Question about 1993 Pontiac Grand Am
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Posted on Jan 02, 2017
If its the 3.1L it could be your intake manifold gasket , the material used for the gasket does not react well with GM's Dex-Cool antifreeze. The leak may not be apparent at first, but I would pressure test the cooling system. If you look at the front of the motor by the belts , try to peek down at the intake manifold and check for slight seapage to an obvious leak.
If its either of the Quad-4's they were notorious for heads warping or cracking.
Posted on Feb 03, 2009
sounds like security system problem...to re-set, put key in ignition, turn to run, till security light stops flashing. turn off then start car. See if this helps!
Posted on Mar 16, 2009
Most faultcodes don't disappear automaticly, the have to be 'reset' manually after repairing. It sounds like the code didn't get erased after replacing the MAF. You could try to disconnect the battery for 10 minutes (disconnect and reconnect the negative (-) pole), which should erase the code.
Whenever the engine light still comes back on after that, there probably still is some (other) problem ...
Posted on Aug 24, 2009
a bad mss air sensor would cause this, but your engine lights(check engine) should be showing.. Trust me; if you didn't have a crank sensor; it wouldn't run at all. A simple test for you in vaccum lines. get a bowl of soapy water; and while it's running;slowly over each line, liberally put water and soap mixture. If it's sucking air it will bubble at that sight. But a problem with 3.1, and 3.8's(Dorman makes these) are the intakes. They have a problem(all of them!) where a faulty manufacturing problem, causes the back seal to blow out and warp the manifold. You lose vaccum there, and it runs awful. It's about a $179-199.00 part(comes with everything you need in kit) at OReilly and Carquest and Advance . I'll bet that is the dog in this hunt! Good luck
Posted on Aug 29, 2009
Based on your observations you have bad speed sensors if the ABS if fine on straight line. The turn is bringing them out of specs and causing issue. Pontiac is a GM product and therefore has a Kelsey ABS control unit and two speed sensors that feed it. The Kelsey units are KNOWN to go out in GM and are very expensive. NHTSA looked into it but since the brakes work without it, they said no recall. So GM isnt doing anything for older cars like yours and mine. You can see about getting it fixed but dealer will charge $1200 plus. The speed sensors are expensive but less so than the unit. My suggestion is to have a dealer look at it for diagnosis.. this is usually an hour of labor at normal GM dealer rates $85-$100. That way you have a definitive. Once you have the definitive you can then decide how to progress. If it is your Kelsey unit you can get a reman one from ABSFIXER.COM for much less than dealer and if you have a trusted mechanic they can follow instructions on website to do replacement. I would have speed sensors checked first though.
Posted on Jun 08, 2010
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