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Originally Posted by 69GTO
My 1991 Sunbird is giving me fits. I can sart it up easily when its cold but it is after a 25 to 30 minute run that it wont it will crank over but no spark what so ever, but then you wait for a bit say 10 to 15 minutes and it starts right up, never dies just dont shut it off  which is kinda of like lottery starting which really sucks because I have very few positive hits, more negative not starting after a 25-30 minute run. I have changed the coil packs and it still does it. It is a 4 banger 2.0. I have read some other posts that have had simuliar problems. So I started doing some research. Could it be the crankshaft sensor or the camshaft sensor? The answer is no. because according the Mitchells and the dealership that year does not have either one. So I am kind of at a stand still on what the problem is maybe someone here can give me some better insight one where else to start. Thanks |
91 2.0.. off the top of my head I can't rember if they had TBI or MPFI?? which does your car have. Does it have a Dist. hanging on the driver side of the camshaft carrier??
IF you have the Dist... I would check the module.. A dist. app will not have a CPS as the ECM gets it's readings directly from the Dist. It should be a cheap part, and easy to replace.
IF you have MPFI, you will have electronic ignition and you will not have a DIst... instead you'll have a coil pack on the back of the engine under the intake... if this is what you have then you will have a Crank Sensor on the front of the block just above the AC compressor (or under the water neck just above the oil pan). Also a cheap part.. just a pain to replace (the factory ran the wire behind the rear timing belt cover).
Let me know which setup you have and I might be able to help you further.