Question about 1991 Chevrolet Cavalier

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Cranks no start,changed ecm,crank pos sensor,spark plugs, wires,ignition module,coils, still no start??

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  • Chevrolet Master
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When you put the key on position does the check engine come on it as to be on if not blow ecm fuses or go to positive side of battery there a little wire after 3inch there a blac k plastic that connect and other wire pull on the wire if it break just remove plastic hook the wire togetherand try it good luck pierre

Posted on Aug 02, 2009

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Check for a blue snapping spark on 2 or 3 plug wires(or all of them). If you get good spark, then ignition is likely not the problem. A weak or sporadic spark could be a bad coil or coil pack, or a bad ignition module (the ignitor).Check the coils with a volt-ohmmeter per the specs for your car. The ignitor can be tested at a parts store.
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Sounds like the ignition module or the crank sensor. Even though the crank sensor is fairly new doesn't mean anything. Remove the ignition module and take it to a parts store. Most parts stores can test it.

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Just need to know if the pass key system on a 1993 buick lessabre will cause the 3.8 engine to crank but not start no spark aii components replaced including ecm


Have you replaced the ignition module uner the coils. The pass key cuts off the starter and fuel does not effect spark. if you have no spark crank sensor cam sensor ignition module coils and wiring are all that is there.

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You said you changed the ecm module, is that the ecm or the ignition module. Do you have access to a scanner to check cranking rpm? That way you can test the new crank sensor and the wiring and the ignition module.

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