Turbo surge while accelerating. lazy and never got around to it.

Turbo surge while accelerating 0 Turbo beetle has also been getting some cold morning shakes (worse than the FE) and she has 52K on the motor. I've had my 2013 Turbo Veloster for a year and it's right at 20,000 miles. not sure whats causing it. After passing I took my foot off the gas pedal expecting to coast back down to my cruise control speed, but the car continued to accelerate with my foot off the pedal. The truck lurches sometimes very violently. Injectors, fuel filter, air filter, fuel When accelerating or especially when going up hills the Escape would somewhat hesitate and create a rocking back and forth or surge. I am getting a lot of herky jerky while under normal or moderate acceleration. No codes are setting from the Powertrain Control Module (PCM). Like I was revving it 2011+ Engine Related Questions - Major surging under heavy acceleration - I have a 2012 3. WOT is better once it down shifts, but it is still there. Going up a long hill where it needs the turbos to maintain speed is where I both hear it and feel it as the turbos cycle. Attachments. Checked for misfires but each cylinder is seems like the same issue from another thread. 0, EGR Bye Bye, Bulletproof Oil Cooler, Pat Oakes Tune, 6" lift, 35's, 4" Turbo Back, K&N CAI It will start surging every second and continue doing this until I reach the top of the hill. Surging or hesitation going up hills. You can still hear it in the exhaust, but can't feel it. 0432 549 932 This seems to fit my group of symptoms: Occurs only after being run to temp, unit must sit off, parked, 10 to 30 minutes, then surges on LIGHT acceleration (gently pulling out of a parking space), after which, surge disappears until parked with engine off again. only in that range. Until the temp needle is up to the center I get surging while accelerating. MBRP 4" Turbo Back Aluminized Exhaust (no CAT), BD Full Bore Exhaust Manifold, Insynerator DSL 3" Down Pipe If your truck is surging while in power with a load on it, I would look at a few other things. Tom goes in depth to 2009 - 2014 Ford F150 - Intermittent rpm and boost surge on acceleration. Because I installed all I have a 2011 SCREW (build date late April) where the turbos started cycling on and off during acceleration or under load when pulling a trailer or going into a strong head wind. I then undid the one hose connecting the BCS to the turbo inlet hose (the one connecting the input of the turbo to the snorkle of the intake, and blew on it while switching the solenoid on and off w/the 12V supply. 50x20, Color matched Brake Calipers, Amp Research Steps, H+S, CAT/DPF delete, AFE and 1000 watts of Starting today at low speed easy throttle under acceleration it's starting to also do it. acceleration is up hill. i checked the actuator through insite and it passes every time. I have an egr delete but am getting a p041d code 2015 escape 1. now its acting up again. Looking for other people to come forward if they are experiencing surging on the veloster turbo. My latest truck is a 17 3. I will explain everything ive done to Started out at higher rpms,3500+ but now its on acceleration almost all the time now. Sounds as if variable veins in turbo are opening/closing slightly. Jan 8 6. My car seems to surge forward and backward during moderate acceleration, most noticably in 2nd or 3rd gear. I did the same, took 45 minutes, and all is well! Anyways all back together bled system installed 2 check valves to return side. " Bucking means you feel a breaking force and is almost always drive train related. As for the surge, it is only at low rpm while holding at a steady speed. 0. 5L non-turbo (other family members) 2019 CX-5 GTR 2. while accelerating under a steady throttle, it will surge, etc. I hear a little chirp from the turbo during the surging. 6. This happens when I first drive each morning. 87000. 030 GAP results in severe predetonation (pinging) under load and hesitation on acceleration. This characteristic will not be present while using the A/P pedal. Any ideas . Monitor FRP_DSD (Fuel Rail Pressure (FRP) desired) compared to FRP_ACT ( FRP actual) during the engine surge condition to determine if there is any potential issue of fuel supply be it the function of the low pressure pump or high Is there something else to use to clean that carbon off. noticed three months ago after the injectors were installed a slight hesitation on take off from a stop and when backing up and stopping. Any advice or help Have an issue with a 2019 Edge Titanium. Runs great besides the surge/pulse on acceleration. If i shift while acting normal it shifts normal. One thing is for sure, you won’t be able to drive safely if your engine keeps hesitating while you’re on the road. Every 3-5000 miles. It is mainly noticable when pulling my trailer and going up a hill. As it starts to pull then power seems to be halted but the turbo continues to spool. until it is at full operating temps 185+ it will rev 100 to 500 rpms while idling. I was accelerating from 1900 after slowing down for potholes, and eased the pedal down. Dirty injectors can cause your car to lose power and make your car jerk while driving at constant speed or from a stop due to frequent engine misfires. It Occasionally I'll be accelerating lightly and RPM will be slowly climbing then drop ~500RPM then keep climbing; My wife's 2013 VW 2. hesitates. flushed filter bowl out and the truck ran fine for a day. Sadly, it's normal to some degree. Save Share Reply Quote Like. Recently, my 04 6. I can feel it in the pedal. 2014 Chevy Cruze 1. 5 ecoboost that Ive owned brand new. YouTube videos, etc and the main cause typically seems to be from either a bad wastegate, failing turbo, loose or broken vacuum lines, loose or cracks in the Potential "surging" while accelerating fix!! Tags accelerating fix potential surging. Basically it will accelerate normal then add what the butt Great thread, despite the misinformation/bad diagnosis posts. Also had a boost surge in 5th gear around 2300-3k RPM under mild acceleration, with decreased power. 136 posts · Joined 2020 Add to quote; Only show this user #1 · Jul 12, 2023. When using less than 50% throttle to accelerate and above 2,000 RPM, I get a surging with a frequency of about half a second. To help you pinpoint the cause of your engine hesitation, here are the most common culprits. There is a thread called 2019 Edge low speed surge/buck further down the 2. 0 having the same surge/rpm bump while cruising under light load around 35-45 2011 F250 Golden Bronze Fully Loaded King Ranch FX4 with Navigation, 6. You likely have a split in one of them, which will be leaking boost and therefore depriving the engine of This started about 2 months ago. 028 results in minor pinging, but no hesitation or surging. It also surges going down the freeway. 0 having the same surge/rpm bump while cruising under light load around 35-45 mph (which is being confused with stumbling/stuttering/misfire problems others are having under load/acceleration etc and mislabeled as "having same problem" which convolutes the issue). 35 years experience with ASE Certs. I've come up with ICP sensor or VGT. Your turbo is spinning at 90,000-150,000 rpms and when you hear that noise the compressor wheel is coming to a near abrupt halt several times. Ron. There is a surging whooshing sound, almost sounding like the wastegates opening during the acceleration. Sinister Diesel coolant filter, ELC coolant, updated turbo drain tube/oil feed line/STC fitting/oil cooler, ARPs w/OEM HGs, Elite coolant lines, ITP RR fuel system, RCD 175/30 injectors, KC Turbos Stage 2, FICM. Need some help with an surging issue. I'd check the dump normal stuff first: air cleaner Spark plugs vac leak turbo PCV, just 'cause Now to the problem I have been noticing a surge at cruising speeds around 1500 to 2000 rpms. Hello all, Thanks so much for the help and Ideas on what might have been causing the surge on my 6. I noticed a “miss” feeling and engine would almost die. Im about to take it to the dealer just want to know Surging during acceleration. 0 diesel. Makes sense that if there was a malfunction somewhere, and the flaps returned closed while This is a common problem of turbo stall and turbo surge experienced by many modified Powerstroke diesels. cant leave a stop without feathering Customer Concern:The engine surges at cruise speed. rough. It dont matter what gear I am in it is still the same in the same rpm range. 10 years in Ford Dealership, Certified in: Auto Trans, Diesel Engines, Climate Control Now that it is back together, the engine itself runs fine, but the turbo is constantly cycling. Under light acceleration, usually between 1500-3000 rpm if I let off the gas I have what sounds like the wastegate opening prematurely. I appreciate the help 2006 F250 Lariat Crew Cab FX4 6. See Also: 9 Reasons Your Car Makes a Rattling Noise While Driving #1 – Dirty Fuel Injectors. Of the BCS appears to So the check engine light came on again while accelerating right around 4k rpm. No codes I’m really lost but today I was driving to get some 19in RS wheels, if I pushed it on the highway 70-80 mph I would get a lot of turbo noise, almost like flutter during acceleration and my rpm’s would go up and down (while I’m holding the pedal down) without much acceleration. Rpm jumps back and forth while surging. 5L Eco-boost with no hybrid elements. This is a common and annoying problem that can be responsible for a variety of issues. sensor light. Im still not sure why the engine and turbo would surge like it is but being in the shop we can figure that out. If you have a bad ford dealer in your town, Try the lincoln dealer, I did they have a diesel tech and honor Accelerating hard from low RPMs; Abruptly lifting off the throttle; Operating at the upper end of the turbo’s range; The turbulent airflow within the turbocharger and the intake system creates Surges thru all gears. 2013 Ecoboost turbo surge issues. Save Share Like. Does not matter My Lifted 2015 AWD Seinna van had a bearing going out on the transmission so I'm now the Proud owner of a new 2023 Limited Highlander AWD with the 2. I was hauling hay on a fifth wheel trailer and my '06 F350 started jumping again. I have a tune, intake, 5" exhaust, and dpf/egr delete. When ever it surges it puffs black smoke 2015 - 2020 Ford F150 - Does everyone's ecoboost surge or shudder - So I've owned 3 ecoboost trucks and all of them have had some sort of shudder while accelerating which hasn't bothered me much til now. Totally different from the spark plug shudder. Top 10 Reasons Your Car Hesitates When Accelerating or Driving. About once a month (completely intermittent and random) but usually when towing heavy up a hill or under heavy load, the truck will lose power, the boost gauge will spike, then it seems like the wastewater will open and make a "puh, puh, puh ,puh, puh" sound as the boost gauge jumps up and down. Oddly no "bogging" with A/C on though. Works great now! Original Post My escape is is jerking/sputtering when I try to accelerate to highway speeds. 10584648-FE99-41AD-8AE2-50181789A9EB_1553258942181 Have you ever wondered what turbo surge is and how it effect the efficiency of your turbo? If thats the case you're in the right place. 0 started stuttering and surging while under a constant throttle. I've made certain I'm not tapping my foot to keep time with the music on the radio. 0 Excursion with the following mods: PowerMax Turbo (larger), S&B intake, EGR welded shut, 5" turbo back exhaust, all new sensors. 4 turbo it has these codes P0106 P015B P0171 P01101. I think its 2200-2400 could be wrong about that ( will update to a precise rpm and I've been struggling with this issue for about 2 years on my 05 6. Turbo psi Rpm Fuel low pressure side Surging at highway speeds with incline (2) The vehicle has surged while driving (highway speeds with any incline) for some time, I recently changed the ATF and am considering doing it again as it didn’t improve much if at all. Would something like this be EGR related? On a side rant, I have always had great success with my Dodge Dakotas (2), Durango, and 5. I consistently had surging this week on a lot of highway driving. 0. I’m new here and new to Subarus (bought a 2022 touring last October). Sort by Oldest first Car runs fine at idle and at gentle acceleration, also not noticed a surge in 1st and 2nd which all pointed to a boost control issue, the clean. Generally speaking, a completely stock turbo engine will not compressor surge during acceleration. Dux Billet Grille Insert, EDGE Insight CTS2 w/ EAS turbo timer and camera, B&W Turnover ball gooseneck with Firestone air bags, Truxedo 2011+ Engine Related Questions - Ecoboost lurching/surging - Has anyone experienced their Eco lurching/surging while accelerating with the cruise control engaged? At around 45-55 mph with the cruise on, during acceleration, my truck feels like it has a miss or something. Code was P0455 Large Evap leak. The most likely cause of surging like this is going to be a faulty Under medium to hard acceleration I can hear the turbo building pressure and blowing off once or twice a second depending on how hard it's being pushed. It only does this under load (heavy acceleration, accelerating up hill). I have about 10,500 miles and my car has done this 4 times in the past 60 days. I tested my boost control solenoid. they said oil in turbo solenoid. Recently when driving ive been noticing on moderate acceleration and cruising speed with turbo spooled a surging from turbo/exhaust. For instance, at highway speeds, it will just sorta stutter some. 5l ecoboost in my f150. I use a neat electrically driven turbo to explain what surge is, and demonstrate 2013 Ecoboost is surging, during idle it’s shaking the truck slightly, but when I’m driving down the road it feels like it’s surging, rpm gage is surging around 300rpm difference. It's not as immediately horrible as surging during acceleration while you're building or at peak boost Our 2017 Explorer 3. It is surging. 6litre surges on hills or under hard acceleration. Im having a surging issue. 94 New engine build in the works Replaced the camshaft position sensor, fixed CEL. I have a 2013 4x4 xlt 3. Another user posted about erratic acceleration and said he swapped out the turbo solenoid and fixed his issue. Tests/Procedures: 1. I have major lurching/surging issues under hard acceleration that starts at 4000 rpm and stops when reaching 5000 and above. LOGAN. This was with the turbo Runs great besides the surge/pulse on acceleration. From day one it has had a low speed skip or surge while accelerating. 22139 posts · Joined 2007 Hey all, My truck, 2014 3500 with straight pipe, DEF/EGR delete & MM3 tuner, recently started to surge or lope but only when I'm usually accelerating or barely feathering the throttle. I intend to continue the battle until a resolve is reached. 0L diesel engine may exhibit various light surging concerns upon light acceleration from stop to 50 MPH (80 Km/h) typically on cold start, 1800 to 2800 RPM in drive or neutral, or under high load typically pulling a trailer and/or 0F, 150 miles from home in NW Ontario mine started stumbling when accelerating up an light incline while pulling an enclosed snowmobile trailer. Did some searching and cant seem to find anything associated with what i am experiencing. 0L Power Stroke Diesel - surging/cutting out under load accelerating - Hello again. Doesnt happen when on stock program. The issue is that most modern turbo engines have a very high tuning potential, and once tuned, can produce enough boost at low RPM to cause surge – the most common examples we see are: If I'm accelerating gently enough that it will at or below 2K, it simply goes into third and continues. Started it up and idled just fine, took it out for a test drive and had a slight surge on acceleration. 2. I have a stock 2022 SE 1. HPOP was replaced around 40k I think the correct term here is "surging. 5 twin-turbo is experiencing a surge and hesitation at the beginning of a slow take off, or a rolling take off. My 2014 is surging under moderate acceleration like around 3000 rpm. It's bad enough to be noticed by a passenger. Full Throttle and just creeping around off boost is not a problem. Issue I have to day is. It had gotten to where any acceleration beyond 1/4 throttle and it would surge or miss in an on/off/on/off pattern. I feel and see ( tach bounces ) a surge or buck at low speed around 15 - 20 mph. I just recently rolled 37k on the clock so my bumper to bumper warranty is gone. I've written Hyundai and had it services every 3000 miles, bringing up the problem each time. 2001 Forester Turbo S & 440 bhp 2002 Impreza WRX. 2015 ford escape titanium 1. I’m quite certain I didn’t get all of the old fluid out and maybe that is what is continuing the surging issue. If at all possible you try to avoid that noise. No CEL - I am trying to get that torque app to monitor live data and see what is going on the second is 70mph Cruise surging and the third is light acceleration while surging . down hill. Although it doesn't always happen only 50% of the time. The only factors I can identify are that it happens between 1/4-1/3 throttle, ambient temps between 0-20 F, and a When accelerating, the truck seems like it's starving for fuel as it "surges" or wont accelerate very smooth. When it’s on the higher PRM of the surge there’s this faint vibration that seems to be coming from the bottom somewhere, vibration at 70mph is around 2 jamiebenz - 11/27/2016 16:53 I have an 07 8600 IH semi with ISM motor that surges on acceleration-much worse under load-It puff black smoke on every surge. I also just brought my truck in for this surging issue, and Now I have a new Turbo and the same surging. Please contact me if you having this issue. Getting nowhere with the dealership or Hyundai head office so I have taken it to channel nine news. I done a little research and I do say little. It Surges thru all gears. CURRENT: 2018 Macan Turbo, Carmine Red on Black, Air Suspension, PSE hi i have a isx15 engine serial #79575723, turbo and acuator are 3 months old, 2 weeks ago the truck started surging almost like the vains are opening and closing constantly unless under alot of throttle. The first is rooted in a protection setting and can be solved with t Engineering has found that this condition typically occurs around 1,500 RPM and at speeds between 60-65 Mph only while cruise control is on. Yes the speed and rpm stay the same turbo boost just goes up and down under steady acceleration. . With the windows down I can hear my bypass valve going "pschew-pschew-pschew" while I hold the throttle steady, and a graph of my boost PSI has a ripple between 9-10 PSI while it's going on. What is causing this on/off power surge under acceleration? I'm presuming it's wastegate, but why is it so noticeable and so bloody annoying? Does anyone else have it this Hesitation, surge (boost) while accelerating Jump to Latest 8. Above this area with surges in power on heavy throttle is usually oem fuel line issue. 7 Turbo surging Some 2004-2006 E-Series/F-Super Duty and 2004-2005 Excursion vehicles built before 8/22/2005 and equipped with a 6. I have a 2018 F350 fully deleted and tuned. Don't forget that's also when the turbo would be generating boost and the previously mentioned solenoid is operating. I used the torque app and a bluetooth OBD scanner, and monitored the engine under load while driving. This can be seen when datalog the car and will occasionally throw a code but not always. while neither are good, they are probably caused by intake/exhaust leaks in different parts of the system. R. Replaced by Ford Dealership. If I am cruising at, say 40, and try to accelerate, there is just a puff of Need some help with an surging issue. If I step on the accelerator the miss stops. 7 diesel with about 23,000 miles and just started noticing that I was feeling a surge when under a load on or off cruise at constant highway speeds. No CELs, No limp mode, no rough idling. No engine codes reading or pending. Surging means power loss and then suddenly back on, which is engine related. Reply. If you accelerate tooo hard it will "cough a little too", So far suggestion are turbo actuator or egr valve. 6. After running a while then parking and it sitting there. If I'm accelerating just a little harder so it passes 2K, I get a noticable surge, almost like I stabbed the pedal. 023 results in more power and better in-town mileage (avg 35mpg), but below average highway performance and mileage (37mpg). Atl3128 Discussion starter. 52,487 Satisfied Customers. It's pretty bad, it jolts you around in the seat. 7 turbo surging - I have a 2016 F250 6. And also while coasting around 55 and under I get surging like there’s extra bubbles of air being forced in like minute surges of power. I watched my boost gauge while it was doing this and it was bouncing between 7-12 psi while it was surging even though I didn't change pedal position at all. Anyone have any issue with this? I am very light on the throttle. It flashed like before and just disappeared after a few seconds. 7L Power Stroke Diesel - 2016 F250 6. Tags 14l 2012 accelerating idle issues surge surging turbo. I have the six speed stick, and the 6. I now have 62500 miles on it. com FICM w/ ID tune, Elite UP, BPD water pump - 13. 4 Turbo. As the truck Surging when cold. - Hello everyone. I tried accelerating passed 4k rpm again and that's when the surging happened it seems. However no noticable variation in engine RPM on the tach. When coming to stop light, it will want to die from time to time, which it has done. If I jump on it, she runs fine. And obvious feeling loss of power. While starting cold or warm. However, it is VERY noticeable on mid to heavy acceleration. 9K views 29 replies 4 participants last post by TangoMike415 Sep 20, 2021 Well my surging was getting worse. It is a surging feel when slightly accelerating. My theory is I never heard the surging before becuase of the quiet exhaust, and didnt feel it while driving because of the torque management keeping the throttle kind of dead. 2015 escape 1. It's worse in eco mode and when it's cold, but never entirely goes away. Replaced the turbo waste gate solenoid , also referred to as turbo control actuator and took care of that problem immediately, takes only about a 1/2 hour to 45 minutes in labor time and the turbo solenoid part is The reason why I suggest it is because it's only happening when you're accelerating, or under a load. - It only does it while I am trying to hold a constant speed (not accelerating / decelerating - The tachometer shows the engine surging <i>up</i> about 1-200 rpm - The surges last for just a split second, but as soon as the RPMs drop back to normal, another surge will kick in so the tach is bouncing up and down. The surging here only happens when the engine is cold, it will smooth out a bit at 3200-3800k RPM, but as soon as you get back on it, it does the same thing. Anything over . If I accelerate fairly hard without letting down shift the surge goes away. 2020 CX-5 GT 2. It doesn't happen in 1st or 2nd, but it'll do it on 3-6th gear. 4 . The condition known as turbo surge or stall occurs under heavy load conditions where boost pressures I have combed the forums and most of what I have found is for the turbo model or much newer Subarus. I does seems to clear a bit but low speed acceleration is never smooth. You’ll want to figure out the cause and get it fixed ASAP. I think its 2200-2400 could be wrong about that ( will update to a precise rpm and mph later). 3. One thing i am not understanding is, why is the turbo actuator command jumping around 75-88%? There are 2 main causes of the 2017, 2018, 2019, 2020, and 2021 L5P Duramax Turbo Surge. It's barely noticeable at idle, and while at a steady cruising speed. Currently I'm running livetune cobb stage 2 93 octane. Some noticable surging can be felt. The faster I accelerate the less I notice the chugging feel. This '17 with all of the Not sure whats wrong. The Tech at the dealer states "these do this" which I think is a cop out. Erratic surge under acceleration. Can watch pids on ids and the ipr valve is being commanded to move when its happening. My 2014 chevy cruze 1. Mods are: HKS uncatted upipe w/o EGT bung SR*S turbo back exhausts w/o cats 2004 f350 surges between 2000-3000 rpm. Good evening. Answered by Chad Farhat in 10 mins 3 years ago. their issue is a lean condition, sounds like yours is a rich condition. The car on the oem tune will not turbo surge in 99%+ of cases especially above 3. 6 ecoboost. The PCV valve didn’t make the rattle noise while shaking it, only got a rattle after every 5-10 hard shakes, so I think it was bad and had lots of gunk inside. Two times while accelerating on an on ramp to an interstate and another one today, accelerating mildly away from a stop light up to 45 mph. 7 idle surge !! FIXED WITH SOLUTION !! Howdy, First time post on thread, been watching for some time. Given the multiple previous posts, I'd go with the solenoid- providing all Basically you need to check all the air hoses from the turbo to the Intercooler and from the Intercooler to the engine intake. I can be going 65 and it will start surging. . it could totally be a faulty front o2 sensor, but it doesn't 6. I have a tiny leak on the turbo for one of the oil lines, but its not dropping, just a little discolored and moist. Wifes Escape 2. I have 2002 just put new injectors,IPR valve, volant cold air intake, and high $$$ FASS PLATINUM 95gph pump. No and that noise is turbo surge/flutter. So at least I can cross off anarchy tuning as the issue. At the level I'm accelerating when this occurs, boost levels should be stabalized due to the VNT turbo design. 5 10 speed and the shuddering is starting to annoy me as it's turning into more of a More recently it does it under both hard acceleration and light acceleration. Jump to Latest 11K views 28 replies 6 participants last post by Atl3128 Jul 21, 2023. My Eco MT would surge quite noticeably at 2500 RPM in 4th gear at about 40-45 mph climbing a large hill. Which would suggest not getting enough fuel. 5L non-turbo lazy and never got around to it. Today, I explain what causes turbo flutter, also known as compressor surge. 069 @ 101. I've only owed my 19' Titanium for a couple weeks but I've noticed from day 1 when accelerating at slow to moderate speeds there's a chugging feel while picking up speed. If i do it while its acting up it will sort of sneeze access boost. The delete was done almost two years ago, which makes me wonder why it hasn't done this until now if it has to do with the delete. Change evap canister valve,MAP sensor,Purge Solenoid Valve,Throttle body,new gas cap and it's still doing it. I took a 12V supply and connected it to the leads on the solenoid pins. 4 engine bucks or jerks during acceleration By chatting and providing personal info, you understand and agree to our On a 2014 Chevy Cruze with a 1. It will do this continuously thru the entire gear up down up down. 4L - Surging Issues While Accelerating. Has custom idp tune loaded now have flashed to other tunes, happens on any tune over stock. Steve S. 7 PSD, 4x4 E-locker, Color Matched Line-x Bed and toolbox, Icon Vehicle Dynamics/One Up Offroad Suspension Lift, BMF Novakaine 8 Chrome 20x10, Toyo M/T 37x13. 5k rpm. timing chain diagram Common examples of cars that suffer open throttle surge. Seems to act up more when cold. 7 cummins. 190000 km. Have had vehicle to dealer service three times. Solved: Wastegate Solenoid Seized. Have not checked the brake pedal position sensor yet. Well I have found the best dealer to take it too, they found the problem called ford "they are aware" of this problem over nighted the part and I was back on the road. We bought it used in December and it has Anyhow this is the problem: While accelerating WOT after peak boost has been met, the boost falls off, the surges back up, then falls off again. Sort by Oldest first Oldest first Newest first Most reactions. your ECU is pulling timing in these ranges in response to knock and creating the surging effect. This is a normal characteristic and is caused by the PCM trying to keep the torque set point and speed the same. Tech describes it as "FOUND THE PCM WILL CYCLE THE VALVES AND WASTEGATE RAPIDLY CAUSING SURGE AND TURBO FLUCTUALTION SOUND. 0L Eco Boost page. Did it consistently every 30 secs to a mn for 10-15 miles. Better for mpg. surge while heavy acceleration , or if i'm in med speed and accelerate little bit i feel missfire couple of time and it goes fine if i accelerate slowly it goes fine, and nothing happen in high RPM (more the 2RPM) , if you manual gears with high RPM ( like going long up **** ) However, I had a weird situation occur twice while accelerating hard to pass (in normal mode, not Sport). I have a full race cat back exhaust, s&b air I’m having the same problem on my 2012, under acceleration I get turbo flutter over and over for a period unlesss I let off the throttle. S. I receive no check engine light, and no fault codes and no codes stored in memory. It's a weird pulsing feeling. 1. This only happens at a certain rpm range. 2012 1. RPMs will plateau and then rise,plateau and rise. fom pezhn supub wpkh krl clzc ehsl pfz vbgdrab voaw nxq ikjp mnsfvx jlzzkvt wfgtlc