5th Gear Member
Join Date: May 2006
Location: San Diego, CA or West Sacramento, CA or Davis, CA
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E30 Sudden drop in tachometer, loss of power
Coincidentally i was searching and another guy names alex had a similar problem with his '89 325i...
On my '89 325i I am experiencing following problem: usually while accelerating, the engine would lose power suddenly for a fraction of a second and then recover. At the same time, tach swiftly drops to zero and immediately recovers. Lights, speedometer, radio, etc work w/o any interuptions. This is certainly annoying if not dangerous.
Now, since the tach behaves this way (drops to zero and recovers), while the car is moving with clutch engaged, I am guessing that the problem isnt with fuel or ignition system components, but instead I am experiencing a computer
glitch. What is the name for the computer that controls the ignition (it ain't OBC, right?)
Thanks in advance,
anyway... It doesnt happen all of the time, mainly at freeway cruising speeds (75-80mph) usually at steady and constant engine speeds, is it a problem with the ECU? Ignition?
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1989 E30 325i (SOLD)
1992 E36 325i (SOLD)
1993 E36 325i (SOLD)
1996 E36 328iS (Current)
2001 E46 325i (Current)
2007 Tucson Limited 4WD (Current)