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  1. LT1 | LT4 | L99 Engine Tech
    Hey all, long time lurker, first time poster here hoping for some help diagnosing my LT1. I have a heavily modified 1996 LT1 Firebird Formula that I purchased 2 years ago; relevant to this issue is an MSD 83811 optispark, a MSD controller box, and a MSD ignition coil. Recently I had noticed...
  2. LS1 | LS6 | LS2 | LS3 |LS7 Engine Tech
    This is gonna be a little long, but details are important. 1996 Cadillac Fleetwood brougham 6 door eureka coach. I drove 5k miles to move, he drove smooth. Got to the mountains (200 elevation to 10k elevation) and his transmission pan popped like a bag of potato chips. Waterfall, so I tightened...
  3. LT1 | LT4 | L99 Engine Tech
    I have a 1994 z28 and everything works fine except for after 1-5 minutes on the road after a cold start, it will, seemingly, misfire. I have no idea what could cause this. We have been having some electrical issues with the throttle body so maybe it's an air issue? We just replaced the egr valve...
  4. LT1 | LT4 | L99 Engine Tech
    Hey, I own a 97 trans am. I needed to replace the water pump drive gear because I broke it replacing my water pump. I striped it down to the timing chain, replaced the timing chain and the water pump drive gear. I put it all back together and when we started it, it cranked a lot. When it finally...
  5. LT1 | LT4 | L99 Engine Tech
    I have a 94 LT1 out of a chevy caprice interceptor with a painless harness installed. I pulled the engine and put it into a rat rod project I've been working on. While the engine was out I replaced the spark plugs, wires, coil, icm, optispark, and the fuel injectors. The air pump was also...
  6. LT1 | LT4 | L99 Engine Tech
    Hi All, I have a 1994 Camaro Z28 with 98k miles that is having some idle issues and misfires when warm. I have had the car since 80K miles and I didn't have any issues before this. The issues started last summer and I have not been able to diagnose the issue. Once the car warms up to temp...
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