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pinging
My '93 325i automatic has a problem with pinging under a light load. For example, going up a slight grade at about 30-40 mph.
The car has had a tune up, the fuel injectors cleaned, and the fuel pump replaced (which improved the problem but did not eliminate it.)
Is there anything else to check which might cause this? I thought these cars had detonation sensors which prevented this problem.
The only other thing I can think of would be that the car has a vacuum leak somwhere - but it does not look obvious by looking at the vacuum gauge aka MPG gauge.)
Any tips on what else to look for?
Todd
'93 325i
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