Help me solve a no start condition
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Junior Member
Joined: Aug 2001
Posts: 58
Likes: 0
From: Los Angeles
Car: 1987 GTA originally 350TPI 3.27posi
Engine: 383 C.I.D.
Transmission: 700R4
Help me solve a no start condition
Vehicle is an 87 Chevrolet El Camino (H) LG4 305 with the same distributor as an F-Body Small Diameter Cap with external coil.
Car just completely turn off on freeway. Car cranks over fine but this is what I get:
No spark going to the spark plug, no spark at the coil wire. Yes there is 12v going into the distributor when probing it with a voltmeter at the pink igntion wire. The coil wire harness connector checks fine. New Cap and rotor. New Module. Still No spark. Here's why I think I might have an intermittent problem.
After changing the module with a brand new GM module, car still didn't want to start. I change the coil from another car with the same setup that runs and GET THIS the car started and I let it idle for about 20 minutes. Just fine UNTIL I turned it off, then the same condition happen. It didn't want to start up again. No Spark at the plugs or Coil wire.
NEW Coil purchased and took off the BRAND NEW GM module that had just been replaced and had started the car and took it to AUTOZONE. When it was tested it was NO GOOD. Great I taught I should just replaced the module and be good to go I thought. This is what I did. I took off the module from a good running car and installed it into my El Camino and NOW I still have No spark. Well, maybe I thought the coil was no good. When I took off the coil from a good running car and tested and still NO SPARK.
I checked the pick-up coil as per the GM manual and when I probe both wires I get a 830 ohm reading which is within spec. I also check for continuity at the pickup by probing one wire and grounding the other at the distributor body. I get the correct infinite reading with the voltmeter set on high. So all the tests on the pickup -coil check off.
WHAT ELSE CAN IT BE?
P.S. This happen after I just had pick-up the car from getting headers installed. I don't know if that has anything to do with this or not.
Car just completely turn off on freeway. Car cranks over fine but this is what I get:
No spark going to the spark plug, no spark at the coil wire. Yes there is 12v going into the distributor when probing it with a voltmeter at the pink igntion wire. The coil wire harness connector checks fine. New Cap and rotor. New Module. Still No spark. Here's why I think I might have an intermittent problem.
After changing the module with a brand new GM module, car still didn't want to start. I change the coil from another car with the same setup that runs and GET THIS the car started and I let it idle for about 20 minutes. Just fine UNTIL I turned it off, then the same condition happen. It didn't want to start up again. No Spark at the plugs or Coil wire.
NEW Coil purchased and took off the BRAND NEW GM module that had just been replaced and had started the car and took it to AUTOZONE. When it was tested it was NO GOOD. Great I taught I should just replaced the module and be good to go I thought. This is what I did. I took off the module from a good running car and installed it into my El Camino and NOW I still have No spark. Well, maybe I thought the coil was no good. When I took off the coil from a good running car and tested and still NO SPARK.
I checked the pick-up coil as per the GM manual and when I probe both wires I get a 830 ohm reading which is within spec. I also check for continuity at the pickup by probing one wire and grounding the other at the distributor body. I get the correct infinite reading with the voltmeter set on high. So all the tests on the pickup -coil check off.
WHAT ELSE CAN IT BE?
P.S. This happen after I just had pick-up the car from getting headers installed. I don't know if that has anything to do with this or not.
Supreme Member
Joined: Sep 1999
Posts: 7,072
Likes: 13
From: Philly, PA
Replace the condenser (capacitor assy.) in the distirbutor. Not becuase I've seen them cause stuff like this, but you asked what else it could be. That's about what you're left with.
BTW- tests of the pickup I have found to prove unrevealing in some instances. If in doubt I replace them, too. You might be money ahead to simply yank a whole distributor out of a junkyard motor and swap it in for diagnostic tests like you're doing.
BTW- tests of the pickup I have found to prove unrevealing in some instances. If in doubt I replace them, too. You might be money ahead to simply yank a whole distributor out of a junkyard motor and swap it in for diagnostic tests like you're doing.
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