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Thread: Coil on plug wire harness
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12-19-2011 #1
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Coil on plug wire harness
Can you guy's point me to someone who can make a wire harness for LS1 coil's to a Holley HP ecm.
Holley has it listed in there catalog but it is not being produced yet.
This is going on a big block chevy with coil on plug Ls1 coils.
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12-20-2011 #2
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The local Pick a Part is your fried.
Which coils are you running?. The LS1 or the "Truck" coils?
Each type coil takes a different size plug at the coil. and the bracket that mounts the coil to the
valve cover.Oliver Shultz
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12-20-2011 #3
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Why can't you just buy the factory LS coil harnesses? They are small harnesses that have 4 connectors for the coils and a big connector at the center of the valve cover which mates to the rest of the engine harness.
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12-20-2011 #4
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Pick a Part is cheaper.
Get the complete coils, mounting bracket and the harness if possible get the "Truck " coils.
They are a better coil.
Can also cut enough wire past the big gray plug to help with splicing into the Holley ECM.
Truck coil is the far right.Oliver Shultz
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12-20-2011 #5
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Thank's guy's. I guess i did not explain myself very good.
What i have is 2003 truck coil's and the harness from the coil to the gray plug. What i need is the other half of the gray plug and about 5ft. of wire and the correct pin's into the Holley ecm.
12-20-2011 #6
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Good you have the Truck coils.
Here again Pick a Part is your friend. The wire harness from the big gray plug is the same for a car or a truck
get the harness from the plug to the stock ECM harness.Oliver Shultz
It's OK to giggle and snicker. don't laugh and point
01-15-2012 #7
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couldn't you just snip off the gray plug and hardwire it, using a relay on the + side to give the coils full battery power?
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