E36/ 318 over rpms?

[illinois]

I have a 318i (1996) and when I am taking foot off the pedal for example when passing another vehicle and returning to my lane, the engine start to run all the way to 5000 rpm. Sometimes it ends and returns to idle rpms, but often it bounces back to 5000 rpm. Especially when driving with 4-or 5 gear (manual/stick) it seems to be a problem.And it only happens when I am "braking with the engine" , when loosening the gas?
Any ideas what could be the problem. Lambda (02-sensor) is check and ok.

[Autotechnica]

I'm a little confused. When you let off the throttle in gear and let the engine slow the car down it will jump back between 5000RPM and whatever RPM You were at previously? Or does it keep accelerating to 5000RPM after you've let off the throttle? You're throttle body could be stuck, it may need cleaning or servicing. You may also want to check that the throttle cable is still intact and working properly.

Bry

[illinois]

Originally posted by Autotechnica@Jul 21 2004, 01:08 PM

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Thats correct, for example when I am driving with 4th gear and engine rpm anywhere over approx.3000 and I am letting off the throttle, the engine rpms starts to go higher all the way to 5000 rpms, and it will keep the rpms there unless I push the pedal for 2-3 times. I have checked the throttle body its ok, and the throttle spring is quite heavy work. Cable is fine also.
And the funny thing is that it will do this over rpm only when driving with gear on, not when I am idling or standing still and pushing rpms over 4000. The engine gets fuel, even it is not supposed to get it or something else (electrical failure, who knows). No difference if the engine is hot or cold and it is starting and idling normally. I was wondering if the throttles electrical censor is broken etc...

[thekid]

how long have you had the car? and has it always done it? when did it start?

[illinois]

Originally posted by thekid@Jul 22 2004, 01:46 PM
how long have you had the car? and has it always done it? when did it start?

I have had the car 2 yrs, and it has worked like a clock. It has not been raining before this started, I have not wash the engine with the waterpressure etc.
Car has run about 100 000 miles.

[bigred318]

check to make sure its not really dirty around the throttle body cable it could be catching on something!

David