Motronic Fault Codes.
Originally Posted by 84bmw318i
as you may be able to tell by my name...i had an 84 318i before that was totaled when a big as suv hit me. But anyway i searched for a couple of months and found a 91' 318ic in near mint condition for $2.5k. The only things that i'm having trouble with is the check engine light goes on and off. Anyone have any ideas as to what couple be causing it to turn on and off? Loose wire somewhere?
and follow the procedure in the Motronic 1.3 section to read the codes.
By God's grace, the only times I've had the check engine light come on in my 91 318i are when a vacuum hose detached from under the rubber air intake boot, and when either my fuel or main relay were starting to go.
Hope this helps.