lt4 has no spark....
Thread Starter
On The Tree
Joined: Feb 2008
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lt4 has no spark.... i have replaced everything! except my coil blaster.....i replaced mi distributor and cap and rotor and even my ignition module but didnt replace my msd blaster due to the fact that it's not that old....but what else could be the problem should i just replace the blaster as well????help please......
Thread Starter
On The Tree
Joined: Feb 2008
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Well i have the accel 8.8 racewire so maybe the same one would be best i think.......wich is a msd but how can i be sure it's that cause i already spend way too much money and still no spark........
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Thread Starter
On The Tree
Joined: Feb 2008
Posts: 146
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at first my cap n rotor went bad so i replaced iit along w/ the distributor.....car ran for a day or two then stopped starting in result to no spark....checked the icm and was bad so i replaced it as well and still no spark at all!!!im runnin out of ideas......
I never recommend replacing cap and rotor on LT1's, always replace the whole unit. On the opti spark there's more than just cap and rotor that wares out.
Have you test your plug wires to make sure they are good?
You can actually test ICM, coil, plug wires, opti harness while its off the car. Make sure your ground connection is ok too.
Have you test your plug wires to make sure they are good?
You can actually test ICM, coil, plug wires, opti harness while its off the car. Make sure your ground connection is ok too.
I dunno if it would run for a day or two and then quit but maybe you didn't get the pin slot from the distributor lined up with the cam correct. I'm not for sure about any of that but hey its worth a shot if your running out of ideas.
TECH Regular
Joined: Feb 2008
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From: Pearl City, Hawaii
I've gone through two MSD 6AL's. Try disconnecting it and run just the stock set-up and see what it does. When my second box went bad it also burnt the plug that connects to the top of the coil. That cost me another $45. Double check that ground wire for the ICM, my stock one was corroded on the inside and gave a lot of resistance. I changed 3 ICM's before I even considered the groundwire.....
