DONE with the LT1.
Thread Starter
Registered User
Joined: Apr 2000
Posts: 1,070
From: Austin, TX or Texas State University at San Marcos
What kind of wire are on it? Also yes why didn't you have it put on a scope? I went through 4-5 sets of spark plug wires and many other parts trying to find my high rpm miss. Ended up being the wires from autozone and advanced tried all the different brands they had and they all messed up. I went with Taylor OTVC wires and Ac delco plugs, bam pulled like a freight train again. Thing is all of those wires appeared fine and showed normal resistence with a multi meter.
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Joined: Aug 2005
Posts: 85
From: Corona, CA
Was harmonic balancer checked?
As you may have read in a chevy mag , they had an LT1 with a missfire that they dramatically changed out with aftermarket ignition bits also. They even went with an eight coil conversion and still kept the missfire. Ultimately, a marginally loose (or cocked) balancer with some stripped threads somehow caused their cronic missfire. Once the balancer was properly secured with new bolts , the missfire disappeared. There was no explanation given as to how this could and did cause a perenial missfire. Maybe pulling yours for a check is worth the effort.
Thread Starter
Registered User
Joined: Apr 2000
Posts: 1,070
From: Austin, TX or Texas State University at San Marcos
As you may have read in a chevy mag , they had an LT1 with a missfire that they dramatically changed out with aftermarket ignition bits also. They even went with an eight coil conversion and still kept the missfire. Ultimately, a marginally loose (or cocked) balancer with some stripped threads somehow caused their cronic missfire. Once the balancer was properly secured with new bolts , the missfire disappeared. There was no explanation given as to how this could and did cause a perenial missfire. Maybe pulling yours for a check is worth the effort.
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Joined: Mar 2001
Posts: 1,138
From: DFDub, TX
Thread Starter
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Joined: Apr 2000
Posts: 1,070
From: Austin, TX or Texas State University at San Marcos
Haha yep, just sold the tranny and engine for 1000 and 3000 respectively. Bought a 01 LS1 out of a friends vette that did a LS7 swap, now i'm starting down that lonnnnng road that is the LS1 swap. I'll keep ya'll up to date, should be finished by christmas, my little Christmas present to myself 
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Joined: Jun 2006
Posts: 2,092
From: lakeville, pa
Haha yep, just sold the tranny and engine for 1000 and 3000 respectively. Bought a 01 LS1 out of a friends vette that did a LS7 swap, now i'm starting down that lonnnnng road that is the LS1 swap. I'll keep ya'll up to date, should be finished by christmas, my little Christmas present to myself
Thread Starter
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Joined: Apr 2000
Posts: 1,070
From: Austin, TX or Texas State University at San Marcos
A couple steps closer.
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Joined: Jul 2006
Posts: 430
i hope you dont just throw parts at the ls1 like you did the lt1, it does not matter what motor it is, replacing parts will always come back to get you, you could have saved a ton of money by actually diagnosing your problem rather then just replacing everything between the fenders until it stopped(or in your case you stopped)
+1
as stupid as i felt paying $100 bux to find out my rough idle/not wanting to start after it sat/failing emissions turned out to be a hole in the intake elbow.... i had a new one on there in a few days and spent $236 total for the diag, the new aluminum hose, and a front main seal.... i can only imagine how much i would have spent just throwing parts.... i had thought it was the fuel pump myself....
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Joined: Nov 2003
Posts: 239
From: College Station, tx
Coil Packs
As you may have read in a chevy mag , they had an LT1 with a missfire that they dramatically changed out with aftermarket ignition bits also. They even went with an eight coil conversion and still kept the missfire. Ultimately, a marginally loose (or cocked) balancer with some stripped threads somehow caused their cronic missfire. Once the balancer was properly secured with new bolts , the missfire disappeared. There was no explanation given as to how this could and did cause a perenial missfire. Maybe pulling yours for a check is worth the effort.
