Motor rolls over but won,t start would bad crank sensor cause this?
Yes the crank sensor could keep the coil from firing, but your truck does not use a crank sensor assuming its a V8.
The coil gets power from the key switch, and the ignition module inside the distributor grounds the coil to fire it.
So the problem could be the coil, or the module or pickup in the distributor. The pickup coil in the bottom of the distributor acts as a cam and crank sensor.
You may need a repair book or shop manual to get the test procedures.
SOURCE: no start, no spark, no signal to the coil
there is a fuse that works the battery try checking if it is still good
SOURCE: 1993 blazer 4x4
I assume you have the 4.3 vortec. If so, check to make sure you have the spark plug wires in the right position on the distributor cap. firing order is 1,2,3,4,5,6. right side of engine is 1 front 3 middle and 5 rear. Left side of engine is 2 front, 4 middle, and 6 rear. On the distributor cap # 1 should be toward front of engine and work counter clockwise from there. Hope this is helpful. KS
SOURCE: 1995 lumina cranks but will not start
Sounds like it has jumped timing, dont know which engine you have so could be chain or belt.
SOURCE: truck has no spark changed fuel pump fuel filter
Odds are it is the $20.00 ignition control module but that may be another fluke change out of parts. LOL
SOURCE: 1988 chevy 3500 runs really bad!
I have the same truck I've been looking for information on a different subject. I am an ASE technician I may know what might be causing your problem. First off the white wire on the coil that goes to nothing is your test wire it's not going to be hooked up unless you are performing a test to ensure that the coil is working. Just changing parts often times does not solve the problem and it can become very expensive and make things worst for the next guy to fix. it's going to be in one of two systems Fuel or Ignition since you just did things to the ignition system I'd start looking there check the firing order needs to know what engine you have before I can give you the firing order. is this a V6? V8 5.7? what all did you replace during your tune up? it could be that one of the plugs are not gaped correctly or tightened down which could cause damage to the head requiring the valves to ground to correct the problem. Your catalytic converter may also be causing the problem one the et hot and melt they start blocking the flow of exhaust. If you would like to read more on that check out this site it has some very good information. http://www.aa1car.com/library/converter.htm
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