3-Series (E21, E30)Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.
I just got a 1984 e30 318i and I am trying to hunt down a problem with cold starting. When the temp is around 30 and below it idles very rough and does not accelerate very well. I do not have the problem when the outside temp is up so I was wondering what may be some things to check that may help. Any help would be great thanks.
Can't find vacuum leak anywhere. This morning it took turn for the worse, would not stay running after it came down from fast idle. This is driving me crazy, I tried to keep it running to warm up but no luck. After a bit I finally ran the battery down, I had to drive my truck to work. When I got home it started right up and is running fine.
It seems to run fine when the outside temp is up above 40f. I did find a vacuum line that was plugged with a screw, it was from the vac advance on the distributer. I reconnected it and will try again in the morning. It is supposed to be about 31f so we will see if it makes a difference. i will keep updating the progress (if any) but am open to any suggestions. My wife asked about using a engine block heater but not sure that will matter much.
The problem is definately related to moisture. I drove it the other day and it was 50+ and raining and it had a miss the whole way to and from work (40 miles round trip). Not sure whart is causing this as the distributer is dry. It almost seems like it has to do with the air intake or possible the vacuum problem I mentioned before. I know this it was 21 this morning and dry, it fired right up and ran great all the way to work so I am ruling out the cold side of the problem. I will keep posting as I find things out, please keep giving advice I am very thankfull for it.
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