Thread: 1991 300 ce
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Old 03-17-2005, 04:46 PM
Rahulio1989300E's Avatar
Rahulio1989300E Rahulio1989300E is offline
V10s & V8s FTW!
 
Join Date: Jan 2005
Posts: 1,147
I will help you!!!!

When my car was cold it had a very hard time staying alive....

I got it soo mechanically adjusted that it ran at 500 RPM upon startup and usually held that engine speed....

I replaced the Over Voltage Protection relay (OVP) and got all my electronic fuel functions back... (like cold start enrichment)

My car now idles at about 900RPM in P, 750RPM in D and then slows to 600 RPM in P or D when warm and in gear.

The part is about $70 to $75... but is a very common culprit....

Before you buy a new one... check it out... there will be a fuse on top of the device... pull it out and check if the fuse is broken!

Even if the fuse looks okay, replace it anyways! Trust me on this one!

See picture for location!
Attached Thumbnails
1991 300 ce-engine-bay-copy.jpg  
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2006 BMW M5 "Heidi" @ 109,000 miles
2005 MBZ C55 AMG "Lorelai" @ 165,000 miles
1991 MBZ 300E "Benzachino II" @ 165,000 miles
1990 MBZ 500SL "Shoshanna" @ 118,000 miles

(On the hunt for a good used M103 engine as of 6/10/23, PM me if you have one to sell!)
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