Subbing to this thread because my stock B25 idles at 500 RPM too (except when warm. On cold start idle is 750). Want to see what it is for OP as that can give me clues on my own idle issue. I had the AFM adjusted and that didn’t fix it. Had the car smoke tested and shop said there was a large vacuum leak at the back of the valve cover; weird because my VCG is new and one of the rocker shaft plugs was replaced. I was also able to run my old 325e with the entire valve cover off and it idled fine. Vacuum hoses on my car look good. FPR doesn’t leak fuel out the return line. CTS was just replaced. ICV has been cleaned out thrice although it does rattle as hard as I expected it to. I think mine and OPs idle issue is caused by something electronic.
-
1986 325e Schwarz (sold)
1989 325iX Alpineweiß (daily)
Greed is Good
-
has it ever idled correct?
some other things
make sure throttle switch is good and set correct.
ICV might need more than a clean, id try a known good one.89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
Comment
-
Not since I brought it. Throttle switch has continuity with the throttle at rest. The ICV resistance is in spec. I unplugged the ICV and the car idled dead at 750 when warm. I’m thinking of just throwing a new ICV on it.Originally posted by digger View Post1986 325e Schwarz (sold)
1989 325iX Alpineweiß (daily)
Greed is GoodComment
-
The serviced AFM that Greg from bavrest did solved my surging idle issue! He found that my wiper arm was also worn out and that got replaced. My 2.7i swap idles steady above 500 and it looks like my gas consumption has improved so less stops at the pump haha. Time to enjoy this car now before the next headache!Comment
Comment