lq4 swap no spark
Thread Starter
Teching In
Joined: Jul 2010
Posts: 31
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lq4 swap no spark I just did an lq4 swap into my trans am and took out the ls1. I swaped over all accesories and all sensors. I'm also using the ls1 harness and ecm. When I went to start it there was no spark to any cylender. All it will do is just turn over. Does anyone have any idea what's going on? All the sensors that I swaped over from my ls1 to the 6.0 were all good. Thanks
Thread Starter
Teching In
Joined: Jul 2010
Posts: 31
Likes: 0
The motor turns over but it won't start. There is no spark coming out of the coil packs, but I put got more coil pacs to see if it was thos and they new ones had no spark either... any help would be greatly appritiated
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Very possible the crank sensor or cam sensor isnt reading.if you have access to a obd2 code reader then plug it in and crank the car for a few seconds and it may give a code as to the problem.Id double check the crank sensor first...I had mine not plugged in all the way and did this exact issue.Good luck
Very possible the crank sensor or cam sensor isnt reading.if you have access to a obd2 code reader then plug it in and crank the car for a few seconds and it may give a code as to the problem.Id double check the crank sensor first...I had mine not plugged in all the way and did this exact issue.Good luck
Sadly you may have to do a case learn procedure and that means towin the car to a nearby dealership or dyno shop.You need someone with hptuners or a tech2 to initiate the crank sensor learn.Right now the crank sensor is not correctly reading the reluctor and wont give spark to the plugs.I dont know of anyway to cheat a case learn code but search tech and maybe there is something that can be done.
Talked to my harness guy i was losing power on my ignition relay while cranking soon as i added power to it fired rate up. He also said it should of ran with the crank learn code.
Thanks man. She sounds great, even better with the cutouts opened. I had voltage in the on position but none while cranking.
