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Hesitation @ low RPM
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06-07-2017, 12:57 PM | #89 |
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How do you do that on a moving car ? Since I've no symptoms at idle.
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328i Sports Pkg, Michelin PSS on Staggered 18" OZ Ultraleggeras
. BMS Powerbox. Cyba scoops + Rev motoring intake hose + charcoal delete. Wavetrac LSD . M3: subframe bushings + sways + control arms (fr & rr). Meyle rear toe arms. M3 diff fr bushings . BMW Perf: v2 springs + v1 dampers. Valeo SMFW+clutch. 034 MotorSport engine mounts . Short Shifter + Turner PU bearing + ZHP M weighted shift knob. CDV delete |
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07-17-2017, 02:32 PM | #90 |
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I read through this post. I think I have similar issues in my 2011 328 xdrive. I notice roughness when it starts, and some weird shifting. I didn't break it down as much as some others. I do think it clunks into reverse if the car is trying to find the idle after a cold start. We usually count to 10, then go. If not, it tends to clunk an pulsate.
I bought it as a CPO about 2 years ago with 53k. It has 70k now. At the end of the CPO I had them look at the issue. After a few NPFs, they replaced the ignition coils, but not the spark plugs. The spec for plugs is 60k. Seems cheap on their part. This is normally my wife's car, but I've been driving it lately. I notice with the AC stopped at a light, the RPM went pretty low - near 500. I think the dealer set it super low for the transmission clunk. I bumped that up 100 overall. Did anyone find an easy fix for this? |
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08-13-2017, 06:02 PM | #91 | |
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I did the plugs. Then increased the idle by 100. Not much luck.
It really runs like craps when it is cold. Then decent when it warms up. We literally count to 10 before driving away. Otherwise it like a small boat on rough water - rrrr .... rrrr .... rrrr ... ouch. Quote:
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08-27-2017, 04:23 PM | #92 |
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I had some of the same symptoms as many have described here:
1) random power "hiccups" at lower rpms (around 2-3k) in the first few minutes of driving a couple times each week 2) Uneven power delivery across the entire rev range 3) Rough idle 4) No CEL or engine codes to help with diagnosis 5) 70,000 on the odometer I began by cleaning my MAF and VANOS solenoids, but they both looked clean and there wasn't any improvement after cleaning. Next, I tried resetting my adaptive throttle, which also didn't improve things. I finally started using my Automatic Car Adapter to start reading Short Term Fuel Rates and saw some symptoms indicating an ignition (spark plugs) problem. So I replaced all 6 plugs, which took me about 2 hours. The hardest part was getting the spark plug socket to stay on my socket extension, which I solved by putting a small square of theraband rubber on the end of the extension between it and socket. Then the socket stayed in place. I just cranked her up and the idle was back to normal. Went for a drive and didn't have any hiccups. The power delivery also felt much smoother. I have the 3-stage intake manifold on my engine, and the transition felt much less abrupt than it had the past few months. It might be placebo effect, but I felt like I was able to shift smoother (manual) because the throttle was working better. Lessons learned: 1) If you're at 65,000 miles on an N52, think about replacing the spark plugs 2) If you have a 3-stage intake manifold (with a tune), make sure you aren't applying heavy throttle at low rpms just because you have all that new torque at low rpms. I always thought I knew what "lugging" was and that I wasn't doing it, but looking back maybe I was. Apparently lugging can cause premature spark plug failure. So moral of the story is, if you're going to accelerate hard go ahead and downshift so you don't damage your spark plugs. Hopefully this info is helpful to someone else! Feels good to have my buttery smooth straight 6 back
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2017 F87 M2: MGM, 6MT, AA Tune, Eibach Pro-Kit, Fabspeed Catted Downpipe, Evolution Racewerks FMIC+Chargepipe, Autosolutions SSK, CDV Delete, Vorshlag Plates, PFC-08 pads, Apex EC-7 18x9.5"
2013 E92 328i M-Sport: BSM, 6MT, 3IM+AA Tune, BMW PE, M3 control arms, Eibach Pro-Kit, Bilstein B8, BMW SSK, CDV Delete, Apex EC-7 18x9" |
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08-29-2017, 05:24 AM | #93 |
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Drives: 09 328i Sport 6MT
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I just did plugs and coils, at 86000 miles. Solved my hesitation and rough idle issues, granted they were mild to begin with, but the hesitation was getting progressively worse.
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09-08-2017, 12:51 PM | #94 |
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did plugs, coils, maf, solenoids, vvt motor, camshaft positioning sensors, vvt check valves. symptoms still there: hesitation/stumbling at starts or low rpms + the rpms drop badly when taken out of gear after coasting, at times killing the engine (with a/c on). puzzled by this beyond belief...
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328i Sports Pkg, Michelin PSS on Staggered 18" OZ Ultraleggeras
. BMS Powerbox. Cyba scoops + Rev motoring intake hose + charcoal delete. Wavetrac LSD . M3: subframe bushings + sways + control arms (fr & rr). Meyle rear toe arms. M3 diff fr bushings . BMW Perf: v2 springs + v1 dampers. Valeo SMFW+clutch. 034 MotorSport engine mounts . Short Shifter + Turner PU bearing + ZHP M weighted shift knob. CDV delete Last edited by DaanBMW; 09-21-2017 at 08:10 PM.. |
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09-21-2017, 04:18 PM | #96 |
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Eccentric Shaft Sensor
Coils and plugs not the issue so I took it to my independent for them to read it even though I wasn't getting any errors. The eccentric shaft sensor sent out 5 codes and was my issue, flooded with oil. Here is a DIY guide:
http://www.e90post.com/forums/showthread.php?t=697252 |
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03-28-2018, 11:46 AM | #97 |
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Just to chime in, I had exact same issue than OP on my 2011 Z4 N52 3.0 engine 51k miles so I came across this thread. I replaced the spark plug and cleaned the VANOS Solenoid with brake cleaner and it's been running flawlessly since.
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04-11-2018, 06:05 AM | #98 | |
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Hesitation at lower rpm
Hey Daan,
did you managed to solve the problem with the hesitation at lower rpm? I have exactly the same problem and also no fault codes stored. Would be nice to hear your status about fixing this. best regards Major Quote:
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04-11-2018, 03:45 PM | #99 |
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Still not solved it. However during the colder season it's a bit better and it gets less noticeable.
List of parts swapped out: spark plugs, coils, maf, solenoids, vvt motor, camshaft positioning sensors, vvt check valves, fuel pump ECU. Also cleaned throttle body. Also all my software is the latest possible via INPA.
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328i Sports Pkg, Michelin PSS on Staggered 18" OZ Ultraleggeras
. BMS Powerbox. Cyba scoops + Rev motoring intake hose + charcoal delete. Wavetrac LSD . M3: subframe bushings + sways + control arms (fr & rr). Meyle rear toe arms. M3 diff fr bushings . BMW Perf: v2 springs + v1 dampers. Valeo SMFW+clutch. 034 MotorSport engine mounts . Short Shifter + Turner PU bearing + ZHP M weighted shift knob. CDV delete Last edited by DaanBMW; 04-11-2018 at 03:46 PM.. Reason: clarif |
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04-11-2018, 04:03 PM | #100 |
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major330i: Just read your visitor message (seems no notifications for these msgs are received ?).
It's depressing... my really last card was replacing the fuel pump & relay. You listed fuel pump & filter, but not the relay. No idea about EGR - was not on my list. I don't have DISA valves mine is the 1 stg intake.
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328i Sports Pkg, Michelin PSS on Staggered 18" OZ Ultraleggeras
. BMS Powerbox. Cyba scoops + Rev motoring intake hose + charcoal delete. Wavetrac LSD . M3: subframe bushings + sways + control arms (fr & rr). Meyle rear toe arms. M3 diff fr bushings . BMW Perf: v2 springs + v1 dampers. Valeo SMFW+clutch. 034 MotorSport engine mounts . Short Shifter + Turner PU bearing + ZHP M weighted shift knob. CDV delete |
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04-12-2018, 04:56 PM | #101 |
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I have an n53.. there is just the disa left over and the egr valve. If you look at the symptoms the problem seems to appear when the car running with open egr valve.
I have Ista+ on my laptop (the original bmw Diagnose Software). When I check the my car there are no fault Codes so I did a couple of test modules. Only The test module „misfire detection“, which is specially developed to analyze misfires caused by coils, Injectors and spark plugs, detected misfires on cylinder 2. in the end of the test module Ista tells me to replace coil spark plug and injector on cylinder 2. the coils and spark plugs are completely new and all Injectors are index 11 and were installed half a year ago + coded. My Plan is to switch injector 2 (misfire cylinder) with another injector and repeat the test module. If the misfire appears on the other cylinder it must be the injector. Without Ista it’s all guesswork especially when there are no fault Codes stored. I will report if I manage to fix this problem. |
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04-12-2018, 05:44 PM | #102 | |
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My strong impression is that the VVT is causing it. The VVT activates only when car is warm, which is when I see the symptoms, not with the car cold (not sure if EGR does the same). I looked at disabling it but so far haven't found a way. I only have INPA and I don't think it has such test modules, but have to check. I sure hope you get the injector to be the culprit, but from the sounds of it it's not highly likely.
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328i Sports Pkg, Michelin PSS on Staggered 18" OZ Ultraleggeras
. BMS Powerbox. Cyba scoops + Rev motoring intake hose + charcoal delete. Wavetrac LSD . M3: subframe bushings + sways + control arms (fr & rr). Meyle rear toe arms. M3 diff fr bushings . BMW Perf: v2 springs + v1 dampers. Valeo SMFW+clutch. 034 MotorSport engine mounts . Short Shifter + Turner PU bearing + ZHP M weighted shift knob. CDV delete |
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04-13-2018, 02:55 AM | #103 |
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i changed both parts which are under the backseat (the fuel pump, the second part is a filter which also includes the pressure control). Nothing changed! I had the same idea as you -> fuel relay! but.. there is no fuel relay.. the car has an control module for the fuel pump and regulates the fuel pump. So the relay is integrated in this module or there is no need for it. So i changed the control module (sits behind the backseat) and coded it. Nothing changed.
My car has no Valvetronic.. if we have exactly the same issue then the VVT and DISA shouldn't be the problem. There just 5 options left. 1:air leaks (trottle Body sealing, egr sealing, vacuum hoses) 2.The Egr valve can't close properly (thinking about to deactivate the whole egr system) 3. Injector (because of the test module "misfire detection") 4. Problems with nox Sensor or catalytic converter (i have the secondary cats/ nox cats deleted) 5. Transmission problem (low oil level or bad torque converter) The egr is closed while cold start. The car has to reach a certain cooling temperature until the egr starts to work. The egr works just in a special rpm range (i think 1000-2000). It could be that the egr can't close properly like it should so there could be a leak where exhaust gases enter the intake. i read they changed allready your injectors. Which index have your injectors (this is important). Injectors with index under "11" had problems. But if they changed some injectos and replaced them with index "11" then all Injectors have to be index "11". It's not allowed to mix them up.. only if the injectors below index "11" can mixed up. A second point is that they have to be coded after replacing them. So this is also a point to check if ur not sure about it. |
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04-15-2018, 09:03 PM | #105 |
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I always thought an injector would manifest itself at more than this take-off/low speed hesitation, like issues at idle and/or at higher speeds. So I never tested anything injectors.
I just realized the N53 is direct injected... I would think it's not injector related given mine is port-injected. And mine being a manual tranny in which I changed the oil 4 times in 40k miles, I doubt it's anything related to tranny. Excellent to see more info about different attempts to solve this. I for one I'm still stumped...
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328i Sports Pkg, Michelin PSS on Staggered 18" OZ Ultraleggeras
. BMS Powerbox. Cyba scoops + Rev motoring intake hose + charcoal delete. Wavetrac LSD . M3: subframe bushings + sways + control arms (fr & rr). Meyle rear toe arms. M3 diff fr bushings . BMW Perf: v2 springs + v1 dampers. Valeo SMFW+clutch. 034 MotorSport engine mounts . Short Shifter + Turner PU bearing + ZHP M weighted shift knob. CDV delete |
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04-16-2018, 09:12 AM | #106 | |
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I didn’t bother to read it all, but have you tried swapping MAF and clean your throttle body? Last edited by W37V; 04-16-2018 at 09:18 AM.. |
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04-16-2018, 04:50 PM | #107 |
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I have already changed the maf sensor and cleaned the throttle body and changed the sealing. The hesitation is still there. No smoke test done yet. That’s a good idea.
There are not many things left which can cause hesitation. Disa, Injector, Agr valve, air leak.. but no fault Codes ? |
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04-17-2018, 01:06 AM | #108 |
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No smoke test either. MAF was cleaned and later replaced with brand new. And i've no other problems on idle or codes. Air/fuel leaks would cause more misbehaving.
The hesitation is there upon start-up or accelerating from low rpms, and also when coasting in gear and then taking it out of gear - the rpms drop so suddenly that if a/c is on at times if can kill the engine (w/o a/c it usually recovers to idle speed). scary if you're right in the middle of a turn and lose power steering, happened multiple times.
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328i Sports Pkg, Michelin PSS on Staggered 18" OZ Ultraleggeras
. BMS Powerbox. Cyba scoops + Rev motoring intake hose + charcoal delete. Wavetrac LSD . M3: subframe bushings + sways + control arms (fr & rr). Meyle rear toe arms. M3 diff fr bushings . BMW Perf: v2 springs + v1 dampers. Valeo SMFW+clutch. 034 MotorSport engine mounts . Short Shifter + Turner PU bearing + ZHP M weighted shift knob. CDV delete |
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04-17-2018, 05:14 AM | #109 | |
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I think this is the one: http://www.e90post.com/forums/showthread.php?t=1300719 |
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04-17-2018, 12:44 PM | #110 | |
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Not aware of any other tests that I can do. Also AFAIK the TB is actually only used as a backup to the VVT, and with not codes whatsoever I don't think the VVT has any system-identified issues and thus the TB should not really do much. What this backup really means is not clear to me. I know my TDI was using the throttle body only when the engine was shut down to make it smoother (less shudder).
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328i Sports Pkg, Michelin PSS on Staggered 18" OZ Ultraleggeras
. BMS Powerbox. Cyba scoops + Rev motoring intake hose + charcoal delete. Wavetrac LSD . M3: subframe bushings + sways + control arms (fr & rr). Meyle rear toe arms. M3 diff fr bushings . BMW Perf: v2 springs + v1 dampers. Valeo SMFW+clutch. 034 MotorSport engine mounts . Short Shifter + Turner PU bearing + ZHP M weighted shift knob. CDV delete Last edited by DaanBMW; 04-17-2018 at 02:00 PM.. Reason: think |
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