3rd Gear Member
Join Date: Jan 2005
Location: Canada, British Columbia, White rock
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|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.|
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| Originally posted by Abdul@Jan 26 2005, 08:31 PM |
I wish I had an answer for you. I dont have enough experience with the fuel delivery systems on these cars to really be of any help.
It is interesting that it idles beter with the fuel return blocked off.
Does it only idle rough when it is turned on and the water has not yet warmed up? Cause the car does have water temperature sensors that will change the way it idles based on water temperature.
Does your car have tha extra injector that dumps fuel into the manifold when it is cold? If so, it might be related to that extra fuel injector not delivering the correct mixture.
Will it idle better if you dont do the high speed thing, but just let it idle long enough for the temperture to come up to normal, then bump the gas a little to get it off of idle, then let it idle again. If it idles well then you know it is warm/cold related, and not something sticking.
Just guesses, I really have no experience with this exact problem.
| Originally posted by Abdul@Jan 27 2005, 11:22 PM |
Is the voltage at the fuel pump the only voltage that is low when it is idling crappy? Or, is the actual system voltage low everywhere?
Just a guess but if the injectors are fired electrically and they are not getting the correct voltage to fire right at low idle then maybe the problem is in the voltage regulator?
I don't know, just guessing. Have you tried calling a BMW mechanic, maybe you can find one tthat has heard of this problem.
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