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Old 02-05-2007, 10:20 PM
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Join Date: Feb 2006
Location: Louisiana266 Maloy Rd winnfield71483
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Cool High Rever

Quote:
Originally Posted by STEPHEN NADASI View Post
1987 W124 M103 300E
Engines rev to 5000 + RPM at starting, I then shut off the car.
After 2 to 5 attempts it runs fine. Make no differences warm or cold.
Afraid to damage engine.

1-Have replaced Idle air control valve The 2 rubber hoses to the valve. ( Cracks found in the vacuum hoses / Detected from vacuum smoke test.)

2- Replaced OVP relay Car is running much better.

Engines still revs high only at start up, Same Scenario as before mentioned. Need best course of action, Thank you.
OK, the high rev. could be from an erratic electrical signal from the potentiometer,first the EHA reading should be set, then the on off ratio, and
the readings from the potentiometer,the o2 sensor is another link in the system,it too must be in good shape, all of this can be found by looking up each in the search, I have just completed some of this myself and have several post you can get info from.Good luck and if I can help Let Me Know,JNT
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