SOURCE: i HAVE A 1991 OLDS
Hey, your right about code 42 being the Electronic Spark Timing. The Electric Spark Timing Bypass curcuit or EST circuit is either grounded or open. A malfunctioning HEI module can cause this code so I suggest maybe trying to replace the HEI module. Good luck!
SOURCE: 94 olds hard starts when warm, starts when cold and runs rich
If you can get a fuel pressure gauge, check and see if the pressure is 16 to 24 lbs after the engine has warmed up.
I would connect the pressure gauge when the engine is cold, make sure it does not leak or touch anything hot, place the gauge between the hood and the windshield and drive the vehicle until it is at the temperature you feel it "starts hard". Shut the engine off and try to repeat the no start or hard start and make sure the pressure is correct.
Also, when you shut the engine off, watch the pressure and make sure it holds and does not drop to (0 LBS) of pressure.
One last question, has the fuel filter been changed in the past 30K.
Let me know.
Regards,
SOURCE: disturbed timing...need info on resetting non-adjustable timing.
Sounds like your off just one tooth, try pulling up dist. and back it up one tooth( counter clockwise) and try it again. When you reinstall the dist. it always goes in just before #1 not right on #1. Your in the ball park.
SOURCE: 1999 Oldsmobile Bravada Heating Problem
when engine is cold remove radiator cap and check coolant level,sounds like it is really low and has an air pocket in it.
SOURCE: 94 olds bravada, key stuck, won't start
Check positive battery terminal they corrode real bad and the key will not come out if it is not getting the proper voltage and the shift will not go into park or shift out of park
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