Question about 1988 Chevrolet Silverado 2500

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1988 chevy silverado wont fire. Already checked the ign mod next is the coil. What else might cause it not to fire?

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Internal parts of distributor body ...(hall effect generator/ pick up or rotor, cap contacts as they apply to your vehicle)

Posted on Oct 02, 2010

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Check power to coil thru ignition switch.

Please see my tip at http://www.fixya.com/cars/r6223989-ignition_coil_doesn_t_spark .


1988 chevy silverado wont fire. - 7c627e9.gif

Posted on Oct 02, 2010

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1 Answer

Truck dies when temp. gage gets past middle, will start after cools


Could still be the ign. control module. If they get too hot they stop working. I recommend finding out what is causing your cooling system to not cool correctly. Check your clutch fan for proper operation. check the thermostat and water pump. also make sure you upper and lower radiator hoses are good. finally make sure you bleed all the air out of the system.

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I have a 1995 chevy corsica 2.2 4cyc. The car turns over but will not start.


Yellow spark is usually a sign of a faulty coil, but you have two.
So if the coils are not the problem, it could be not enough voltage to the coils or something else.
The coil fires when the ground connection is removed, in your case the coil fires two cylinders at the same time.
I would check battery voltage to the coils thru the module next.

Apr 09, 2013 | 1995 Chevrolet Corsica

1 Answer

How do you tell if the ignition module is defective.


Generally she don't run. That said, I'm sure you wouldn"t be posting if it did. If you have spark,it's good. Next thing, check for spark at the plugs. If none, then move back to the coil wire at the cap. If no spark there, then check at the coil tower. If no spark there, then get your 12 volt test light and check coil negative terminal while engine is cranking. It should flash. If not, suspect ign. mod. , however, it can still be caused by mag pickup in distributor. O also make sure you have 12 volts at coil possitive ,key on engine off.. I used to teach this stuff but it's been a while. If you have no spark , it's probably the mod, but it doesn't cost much to test the rest. Good luck, and get back to me with any questions!

Feb 23, 2011 | 1983 Chevrolet Silverado

2 Answers

I have a 2000 C1500 4.3L V-6 replaced the dist,rotor,pick-up coil,coil,ign mod,plugs,wires, still no fire, but if you keep trying for about 30 min or so it will finally fire and start?


Go to the parts store and have them hook up the battery and alternator to test the thing under load.  Shouldn't cost you anything for the test.

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1 Answer

1988 cherokee no power to coil


I'd try an ignition module based upon what you have already replaced. Depending upon which engine you have and what month it was assembled, You could have one of several ignition systems (seems like they were using up whatever was on the shelves) any diagrams are cryptic as to any relays used etc. I'd try that, then physically begin tracing the coil power back to it's source. Actually, the car is old enough that I might even consider building my own ignition system and discarding the junk they used when they built it! But, that's somewhat complicated.

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1 Answer

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I know you may have already check this but have you looked at the ign fuse in the fuse box on drivers side dash panel and fuses in the fuse box under the hood

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1 Answer

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you will have to replace the map sensor that is most likely the problem but im not sure what the circut low input is i need more details

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