idle has been fluctuating and often times
stalls from STOP. recently changed the
fuel filter, fluctuating rpm and stalling now corrected, but sometimes idle speed sticks to higher RPM (800),when at "P"
position RPM shoots up to (1000). other times RPM stay normal. what is this telling me?? thanks


[This message has been edited by joel (edited 01-05-2000).]

This could be a common failure such as the throttle switch or the overvoltage relay. I would replace the overvoltage relay first. If that doesn't help, go to a tech for help.
Good luck.

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Benzmac:
1981 280GE SWB
1987 16V
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

JOEL if you find out what the problem is please let us know here because I have the same problem on my M102 engine. I thought it might be the bowden cable which looks a little slack below the throttle cable. The throttle cable itself feels fine. I am thinking of replacing the throttle switch like Benzmac suggest, failing that i'll have to visit MB.
p.s. Try tapping the accelerator pedal slightly several times and see if the idle sinks.

yal
88 230e (W124)

[This message has been edited by yal (edited 01-07-2000).]

benzmac, thanks for the tip and immediate reply. cleaned airflow intake valve and float underneath air filter housing - problem disappeared!! hope it lasts.
where is the throttle switch located, anyway?

[This message has been edited by joel (edited 01-08-2000).]

[This message has been edited by joel (edited 01-08-2000).]

benzmac: my car is acting up again. RPM shoots up to 1000 when car in "P." where is the throttle switch located? thanks.

The throttle switch is behind the gas pedal. Right there on the mat. You can't miss it.

yal -
thanks for your reply. did you change your
throttle switch as you planned? did it fix your problem. thanks

No the throttle switch is located on the throttle body under the air cleaner. It is a skilled job. I'd allow a tech to do this.

------------------
Benzmac:
1981 280GE SWB
1987 16V
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

thanks benzmac. yal, i almost killed my dealer who insisted that it was the kickdown that is behind the gas pedal. cheers!!