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Well, if everything is in good condition (cables, spark plugs, battery, etc, etc.) it could be the VATS anti theft system. From what I understand, this system is a problem on the later model third gens. Check your instrument panel when you attempt to crank that car. If you see a light come on that says "Security," that's it. What is supposed to happen is when you put your key into the ignition, the circuit is completed with the antitheft system and if the resistance provided by the chip in the key matches the resistance standard in the VATS module, the car is able to crank up. There's a resistor chip built into the key (you can't mistake it). Some people measure the resistance of their chip in the key(there are 15 different resistance values) and wire a little resistor like you can buy from Radio Shack with the same value onto the circuit side of the connector. If it doesnt crank then, you either have the wrong resistor or something else is wrong.

Answeri had the same problem with my 91 camaro v6 i got a new battery,accelerator. and starter it turned out i needed a new cables

could also be the timing on the engine. have the timing checked


starting is a common problem with this kind of car. there are three main solutions, and they are easy to diagnose. this could go for any car. if car does not crank, it is the battery. you can recharge the battery with a jump, but you'll need to replace the battery soon. so if that's the case, use another car to jump the maro and limp on over to the nearest auto parts store to get a new battery. if engine cranks, and engine does not even fumble, or misfires so deeply, then this is a sign that theres no ignition, or too much resistance along the way to spark. you can take a multimeter to every wire to check this, from the distributor to elsewhere. if engine turns, and with hard press on accelerator, it catches and then fumbles, its a fuel system problem. replace filter, and if you can run engine with enough hard accel, try to use injector cleaner as instructed. there is the possibility of vaccuum leaks, but this is a problem which tends to build over time and effect all situations of driving.

Could be ignition coil bad.


Ihad the same problem and it turned out that is was a bad fuel pressure regulator and bad injector

check the knock sensor connector just above the starter on the block or the wires on the solenoid on the starter i have the same car as ur's and I've replaced just about everything on it except for the block & rear

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โˆ™ 2011-09-13 17:51:53
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Q: What would cause a 1991 Camaro v6 3.1 motor not to start. i replaced the spark plugs and wires?
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