no signal to coils!?
08-18-2007, 10:20 PM
#1
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no signal to coils!? the morons at the "automotive electric shop" have had my procharged ls1, 1979 c10 truck for almost 4 months ,trying to wire it up. they say they have signal from everything , but the coils. any suggetions? i really want my truck back in running condition. please help!
08-18-2007, 10:50 PM
#2
What year PCM/Harness are you using? Each bank of 4 coils has a common +12v and Ground. Each individual coil has its own signal and low reference going to the PCM. Not exactly rocket science. Are you wanting the PCM connector and terminal #s for each coil?
08-19-2007, 11:38 AM
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both came from a 98 camaro. i sent the original one to pcm`s for less as a core, so im not positive what year it is. they seem to think the computer is the problem, but i just dont see them sending a bad computer, after all they did program it.
08-19-2007, 08:39 PM
#4
Go here http://www.gearchatter.com/viewforum...9cd9723c1bbd41 and look at P0351-P0358 DTC diagnostics for pictures of the coil and PCM pin assignments. Then it's just a matter of making sure the coils have their +12V and ground, and that there is continuity from the coils signal and low reference to the PCMs.
08-20-2007, 09:22 AM
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Can you tell me for a fact you know there is no signal to coils. Just because you don't have spark doesn't mean you don't have a signal.
Last one of these I ran into was the coils were not grounded. And the ls7 had no codes. You don't have to ground the coils to low ref in ecm. You can ground them to a good clean chassis ground.
give me year make model of your harness.
Last one of these I ran into was the coils were not grounded. And the ls7 had no codes. You don't have to ground the coils to low ref in ecm. You can ground them to a good clean chassis ground.
give me year make model of your harness.
08-20-2007, 08:41 PM
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its a 98 chevy camaro harness. i talked to them today, and they are just now hooking up the datalink port to see if any codes were thrown. i will ask them tomorrow if they are dead certain they grounded them. will each bank have ground or is each grounded seperatly?
