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E46 M3 - jerky/hesitation when accelerating
- Thread starter M3west
- Start date
M3west
New member
calypso said:The actuator is the the thinamajig in the engine that controls the throttles position, its a throttle by wire system. So it get a signal form the pedal to say open 50% and its rotates to open the throttles 50%. But if its not smooth, the the car wont be smooth.
Cool, thanks man! Thanks given :thumbs:
Will mention to BM when she goes back next week.
calypso
///Member
M3west said:calypso said:The actuator is the the thinamajig in the engine that controls the throttles position, its a throttle by wire system. So it get a signal form the pedal to say open 50% and its rotates to open the throttles 50%. But if its not smooth, the the car wont be smooth.
Cool, thanks man! Thanks given :thumbs:
Will mention to BM when she goes back next week.
Did you ever resolve the issue?
Theo D
Active member
+1 :dunno:calypso said:M3west said:calypso said:The actuator is the the thinamajig in the engine that controls the throttles position, its a throttle by wire system. So it get a signal form the pedal to say open 50% and its rotates to open the throttles 50%. But if its not smooth, the the car wont be smooth.
Cool, thanks man! Thanks given :thumbs:
Will mention to BM when she goes back next week.
Did you ever resolve the issue?
M3west
New member
Sorry guys, should have replied sooner.
No, the problem is still there and driving me mad. She is now out of MP but dealer says they will try and resolve the issue.
The changed the clutch at 100 000. Workshop manager said drive me 2000km and lets see if the jerky gets better as the clutch beds in. I have never thought that a clutch replacement would have an improvement as the jerk is not related to gear change.
I am going to book her in this week and leave it with them until it is sorted.
Just to reiterate, if im in third at about 3500rpm and accelerate the acceleration is not smooth. kind of runs like it does when it is cold first thing but does it all the time now......
any thoughts?
No, the problem is still there and driving me mad. She is now out of MP but dealer says they will try and resolve the issue.
The changed the clutch at 100 000. Workshop manager said drive me 2000km and lets see if the jerky gets better as the clutch beds in. I have never thought that a clutch replacement would have an improvement as the jerk is not related to gear change.
I am going to book her in this week and leave it with them until it is sorted.
Just to reiterate, if im in third at about 3500rpm and accelerate the acceleration is not smooth. kind of runs like it does when it is cold first thing but does it all the time now......
any thoughts?
osiris
///Member
See this annoys me to the max, The problem is probably something like the actuator like Calypso sugested, but BMW are going to replace the entire car in parts before they address the problem that everyone here thinks it is!
I have had a car that had a warped clutch that caused this jerky hesitation, but replacing the clutch didnt work as the jerky hesitation caused damage to the probshaft and its rubber coupling, so the only way to sort the problem out in the end was to replace everything! as I went through 3 clutches before they figured out that the first clutch damaged all the rest of the things!
I have had a car that had a warped clutch that caused this jerky hesitation, but replacing the clutch didnt work as the jerky hesitation caused damage to the probshaft and its rubber coupling, so the only way to sort the problem out in the end was to replace everything! as I went through 3 clutches before they figured out that the first clutch damaged all the rest of the things!
M3west
New member
Evening all,
So my car is back at the dealer.....for like tenth time for the same problem.
Took her in on Monday to try and solve the jerky acceleration problem. I called the dealer this afternoon to find out how things are going. They suggested they are resetting paramaters (they have done this 3 times already !!!) and they checked fuel pressure as I read that might cause the issue. But nothing !
They can feel the issue but not sure what it is.
I love my car but man I wish they would fix this shit !!!!
:argh:
So my car is back at the dealer.....for like tenth time for the same problem.
Took her in on Monday to try and solve the jerky acceleration problem. I called the dealer this afternoon to find out how things are going. They suggested they are resetting paramaters (they have done this 3 times already !!!) and they checked fuel pressure as I read that might cause the issue. But nothing !
They can feel the issue but not sure what it is.
I love my car but man I wish they would fix this shit !!!!
:argh:
M3west
New member
osiris said:
Sorry, should have given you some feedback. Got the car back from the dealer, they found a faulty relay on the gearbox. Problem seems to be better.
I took it straight to an independent and he suggested it feels normal. Suggested M3's require higher octane than we get in SA. I put in an octane booster and seems to be much better.
Need to get an owner of my M3 to drive mine and vice versa.
Anyone keen in town?
What faheemo said.
From what I understand outside of the DME the engine is the same as the Z4M and that has 2 x Throttle position sensors.
A lot of Z4M owners overseas were having jerking / stuttering issues and had the TPS replaced by dealers only not the one that was giving the issues.
Have a read through this link and see if it sounds familiar: http://www.z4-forum.com/forum/viewtopic.php?f=9&t=39891&start=15
Diagram of offending part: http://www.realoem.com/bmw/showparts.do?model=DU91&mospid=49422&btnr=12_1103&hg=12&fg=10
Hope it helps.
From what I understand outside of the DME the engine is the same as the Z4M and that has 2 x Throttle position sensors.
A lot of Z4M owners overseas were having jerking / stuttering issues and had the TPS replaced by dealers only not the one that was giving the issues.
Have a read through this link and see if it sounds familiar: http://www.z4-forum.com/forum/viewtopic.php?f=9&t=39891&start=15
Diagram of offending part: http://www.realoem.com/bmw/showparts.do?model=DU91&mospid=49422&btnr=12_1103&hg=12&fg=10
Hope it helps.
Pho3niX90 said:
Not the actuator , just the TPS sensor on the actuator.
It's located under the airbox.
for some reason if the top TPS sensor goes it gives a fault code , but the one down under the airbox doesnt throw a code.
I had similar problem wher the car has a hesitation and is kinda unresponsive to the pedal position.
i changed it out and problem vanished.
i'm guessing you have the same problem.
