E 320 1994 Fluctating RPM at idle and 2500 RPM

[Pete1]

I have 1994 E 320 MB with 105K. The RPM at idle and park fluctuates some time. This reulted in emission test failure as the test results could not be taken/invalid.

1. What could cause the RPM fluctuations?
2. What do I need to do to correct this?
3. I am also getting a check engine light. How do I read the codes?

I have already changed the air filter, engine oil and oil filter, and cleaned throttle plate with throttle plate cleaner.

I need help!

Pete

 

[television]

Pete,, take out the OVP relay and bridge terminals 30 to 97 and see if its OK

 

[Pete1]

Thanks Malcolm.

You will have to tell me what an OVP relay is and where will I find it. also where are the terminals 30 and 97 in 1994 E 320 so that I can bridge them.


Pete

 

[television]

Its 119 in the link and has the fuse on top. take it out and the pins are numbered make sure that the wire link is a tight fit in the holes

http://www.detali.ru/cat/oem_mb2.as...GM=717.450&CT=F&cat=15T&SID=54&SGR=040&SGN=03

 

[kth286]

Pete 1

You say the check engine light is coming on. WHICH light is that exactly as there is NO check engine light on that generation of E320 1994.