Breaking up at 6k,do coils go bad???
+1, magnecor for me also, I bought this set in 2001 for my C5, been on three other cars since (including this one), many many plug changes and still 'click' on both the coil and plug like they did on day 1.
justto throw this out as a possibility as i too had many ignition problems with random misfires...mine wasnt consistantly above a certain rpm but just an easy thing to check
the connector pins ,female particularly, inside of the big connector from the coil harness to the engine harness... for some reason they had worn out i guess maybe from removing my coil pack constantly but they would not make a good contact all the time and would cause my car to sputter when getting on it. the easiest way i tested for it was while the car is running i wuld move the connectors around and wiggle it and i could hear the misfires. wait now that i think about it the female pins were one the engine harness side of the coil pack connector but if everything else you try fails id say to make sure all those pins are making contact. i used a tiny sewing needle to stick in and open the pins up again so they would bite on the male pins. you may have to take apart a connector to get a good idea of what imtalking about. like i said just something to try if all else fails and its simple.
the connector pins ,female particularly, inside of the big connector from the coil harness to the engine harness... for some reason they had worn out i guess maybe from removing my coil pack constantly but they would not make a good contact all the time and would cause my car to sputter when getting on it. the easiest way i tested for it was while the car is running i wuld move the connectors around and wiggle it and i could hear the misfires. wait now that i think about it the female pins were one the engine harness side of the coil pack connector but if everything else you try fails id say to make sure all those pins are making contact. i used a tiny sewing needle to stick in and open the pins up again so they would bite on the male pins. you may have to take apart a connector to get a good idea of what imtalking about. like i said just something to try if all else fails and its simple.
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Okay so the car now has new tr6s gapped at .28,brand new msd wires with dielectric grease and perfectly installed,and it has coils off my friends 2000 T/A.
Still breaks up right at about 5700rpm then seems to clear up at about 6300rpm.
This is a tough one. The car hauls some serious *** and i can hear it breaking up in 1st and 2nd. It could be that im spinning the tires in 1st and 2nd though.
What is the deal with increasing the dwell? Im not to familiar with the term dwell and how it effects the car.
Alex
Still breaks up right at about 5700rpm then seems to clear up at about 6300rpm.
This is a tough one. The car hauls some serious *** and i can hear it breaking up in 1st and 2nd. It could be that im spinning the tires in 1st and 2nd though.
What is the deal with increasing the dwell? Im not to familiar with the term dwell and how it effects the car.
Alex
You don't happen to have a 2 step in the car do you Alex?
My two step went bad last year on my first pass at the LSX Shootout(of course damnit) and my car was doing what yours is until we unplugged the 2 step.
I remember PSJ having a problem like this years ago and it ended up being the reluctor wheel on the crank having come loose. Another car with a problem like this that we couldn't figure out a few years ago was also that same issue. I kept saying it while they tried everything under the sun and finally we pulled the motor and sure enough that's what it was.
My two step went bad last year on my first pass at the LSX Shootout(of course damnit) and my car was doing what yours is until we unplugged the 2 step.
I remember PSJ having a problem like this years ago and it ended up being the reluctor wheel on the crank having come loose. Another car with a problem like this that we couldn't figure out a few years ago was also that same issue. I kept saying it while they tried everything under the sun and finally we pulled the motor and sure enough that's what it was.
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Increase The Coil Dwell Table. It Will Fix It!!!
Or send me your tune and I'll do it.
email @ edcmat-l1@msn.com
Or send me your tune and I'll do it.
email @ edcmat-l1@msn.com
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Sean,
I do have a 2step and I did try taking it out of the loop with no change.
I hope its not the reluctor ring. Im going to have to try everything else first before i go and take out the motor.
I do have a 2step and I did try taking it out of the loop with no change.
I hope its not the reluctor ring. Im going to have to try everything else first before i go and take out the motor.
What valve springs again?
Your mph is very low for that turbo, you should be in the 130 range at least I would think. I might be 400 lbs lighter, but that would still put me at 135mph at your raceweight to your 122-124.
Your mph is very low for that turbo, you should be in the 130 range at least I would think. I might be 400 lbs lighter, but that would still put me at 135mph at your raceweight to your 122-124.
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NO sorry i have not. Im doing a different hot side of the turbo kit that is less restrictive.First im going to see if that fixes it,maybe it was due to really high back pressure? Then i have some new patriot extremes im going to throw at it.if that doesnt fix it im doing truck coils. Then if that doesnt fix it im going to pray to lord jesus christ and hope he can come down and take my ls1 apart to see whats wrong
Alex
Alex
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NO sorry i have not. Im doing a different hot side of the turbo kit that is less restrictive.First im going to see if that fixes it,maybe it was due to really high back pressure? Then i have some new patriot extremes im going to throw at it.if that doesnt fix it im doing truck coils. Then if that doesnt fix it im going to pray to lord jesus christ and hope he can come down and take my ls1 apart to see whats wrong
Alex
Alex
I had wondered about back pressure on my setup as well, just put a built 383 in so thats only gonna make it worse, may have to weld a bung in and measure the boost back pressure ratio.
Will try the usual stuff first, fresh plugs gapped at .025",leads, swap out coils from my 346, increase spark dwell, and have some shorter pushrods to give correct lifter preload to go in.
engine is new as are the patriot gold springs so can rule that out, may need a larger AR exhaust houseing, currently .96 on a TC 78 only running 12psi but want to run 15 plus
We have run the TC to 20psi on a 370 w/o trouble, making roughly 775-800whp through an auto. Never had troubles with it breaking up all the way to 6500+ in a 6000lb. truck. PRC duals with 155lbs on the seat, GM Perf lifters, LS6 cam, 7.400 P/R's stock rockers and custom 1 5/8" headers. We run a 4" down pipe and exhaust with no muffler though. Dwell one the coils is at about 5.5. Scott wires and tr6 plugs at .028. Static Compression is 8.5:1.
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From: New Zealand
We have run the TC to 20psi on a 370 w/o trouble, making roughly 775-800whp through an auto. Never had troubles with it breaking up all the way to 6500+ in a 6000lb. truck. PRC duals with 155lbs on the seat, GM Perf lifters, LS6 cam, 7.400 P/R's stock rockers and custom 1 5/8" headers. We run a 4" down pipe and exhaust with no muffler though. Dwell one the coils is at about 5.5. Scott wires and tr6 plugs at .028. Static Compression is 8.5:1.
What AR hotside are you useing ?