From digest.v4.n830 Thu Jul 11 14:38:44 1996
From: Land Shark <lndshrk_at_xmission.com>
Date: Thu, 11 Jul 1996 14:00:50 -0600
Subject: E36 M3 Idle Surge
Yes, it's a known problem...
Don't let them fool you ..
It's NOT a big deal however ..
The reason it happens is that there is code inside the DME that does NOT
engage the idle circuit until the VEHICLE speed is below about 1.4 MPH ..
This causes the speed to surge as the EGO sensor controls the fuel, but the
ICV does not regulate the AIR .. hence the surging rpms ..
The fix is to reprogram the EPROM, but BMW has not chosen to do that, instead
they have a kludge fix that interrupts the A signal from the Instrument Cluster
to the DME when the clutch is pressed in ...
PS: Yes, if someone has it occur FREQUENTLY I could ship you TWO eproms to try,
of which ONE would fix the problem for you ... it doesnt happen often enough
for me at 4800' alt. to diagnose!
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