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Posted on Oct 21, 2008
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1984 chevy p/u with 305 no spark

Rebuilt dist & changed EST Module & still no spark to spark plugs what else can cause no spark?

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  • Master 360 Answers
  • Posted on Oct 21, 2008
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Joined: Sep 17, 2008
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Computer coil power try to disconet the spout wire..... its under the hood by passenger firewall ....... its a brown wire or behind the glovebox

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Change starter capacitor
Visual inspection to confirm dist rotor is turning. Check pick up coil under rotor, 2 small wires, green and white tend to break, pull on them slightly to check. The rotor can burn thru and short to ground. try these.
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I have a chevy nova 1987. Changed the entire distributor, new cap and rotor but still no spark. have a mechanic and he his stumped to. Now we think it might be the ECM. more money....the auto was running...
Have you checked the control module in the dist. to make sure the unit is good. This sounds like the control module is not allowing the fire through. I would assume when you put the new dist. is this would be change but if not you need to check it.
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I have a 1984 pontiac parisienne that starts then dies. I have recently changed spark plugs and wires, fuel pump, air and fuel filter, new battery. What else could be causing it to die?
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May 20, 2012 • 1984 Pontiac Parisienne
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Not getting fire to plug wires. I have replaced coil pack, module, dist pickup,and cap. I have tested and have fire to dist but nothing coming out. This is an 86 2.8 comanche 4x4 w/ 4 barrel Holley carb...
You have spark on the coil wire but not coming from the cap. You replaced the cap right. Did you replace the rotor too. Sometimes the rotor burn in the center and the spark goes right thru it in to the distributor shaft.
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What do you mean? Its either in time or its not. Why are you checking the timing? You turn the dist to get the timing right. Give some history about the complete problem and what you have tried to do to fix it.
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Mar 11, 2010 • 1986 Chevrolet Chevy
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I have a 84 corvette, I changed the HEI coil ignition module dist cap and rotor, I have no spark, the rotor turns, If I put 12 volts directly to the distributor, I still get no spark
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Jan 23, 2010 • 1984 Chevrolet Corvette
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I HAVE A 1991 OLDS bravada with a 4.3 v6. Service engine light comes on and reads code 42 {electronic spark timing or cicuit failure) I have changed dist cap wires, plugs and rotor button, but still is...
Hey, your right about code 42 being the Electronic Spark Timing. The Electric Spark Timing Bypass curcuit or EST circuit is either grounded or open. A malfunctioning HEI module can cause this code so I suggest maybe trying to replace the HEI module. Good luck!
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Oct 20, 2008 • 1992 Oldsmobile Bravada
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