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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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Old 08-12-2012, 02:31 AM   #1 (permalink)
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Off-idle hesitation issue

Ok, I have had this hesitation since I bought the car and rebuilt the top end, but at first thought it was from 2 year old fuel. But now I have fresh fuel in it, and I STILL have this annoying 1 second hesitation. Ive spent the last 2 days TRYING to track down a POSSIBLE cause. But Im coming up with NOTHING so far. Any ideas? Ive checked for vacume leaks, air leaks downstream of the mass airflow sensor, etc. Nothing, no vacume leaks, no downstream airleaks. The car is a 1990 325 IS, M20B25 engine.
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Old 08-13-2012, 04:57 PM   #2 (permalink)
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maybe plugs and wires need changed.
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Old 08-14-2012, 12:59 AM   #3 (permalink)
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Originally Posted by e30_fett View Post
maybe plugs and wires need changed.
Thought about that, but then I remembered I replaced the plugs with brand new ones when I overhauled the top end. It only happens once it warms up and runs for a few minutes.
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