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LT1 | LT4 | L99 Engine Tech

Technical discussion for the LTx Gen II series motors.
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1993-2002 Camaro and Firebird/Trans Am specific tech.
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Say hi & tell us about yourself and your car here. New users are encouraged to post here first before accessing the other forums
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General Tech

Basic & general automotive tech discussion. For anything not specifically related to a particular powertrain or vehicle platform.
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  1. HPTuners programming for dummies

    PCM tuning & Computer Diagnostics
    Here is some info help you guys get started tuning with HPTuners. Credit to ozorowski, Keith from HPT, and WS6snake-eater from HPtuners bulletin board for compiling this basic info. DISABLE ALL TORQUE MANAGEMENT Your a hardcore racer now why do you need a computer to tell you how much power...
  2. 4l60e trans not shifting past 2nd gear!!!

    Automatic Transmissions | Torque Converters
    hey everyone, I tried searching around the forums for my issue. The closest I found was not shifting at WOT. I figured I would ask just in case. I have a 95 Z28 auto with about 125,000 miles on it. Out of no where the car shifts fine from 1st to 2nd, but does not go any higher than 2nd...
  3. Lt1 new optispark wont start help!

    New User Introductions
    Hi. I have a 1996 Lt1 in my chevy pick up. Just replaced the optispark . Lined it all up and everything, put water pump ect. back , tried to start it up but wont start. I'd really appreciate any advice anyone can give me.
  4. Diagnose The Optispark

    LT1 | LT4 | L99 Engine Tech
    Since my car has been acting up here latley I've done a ton of research on how the ignition system works(opti icm coil ect...) I came across this video that ges details on how a opti aka abits works and how to diagnose it. It kinda bugs me in a way when ppl assume right off the bat when their...
  5. 95 4L60E no reverse after transmission fell

    Automatic Transmissions | Torque Converters
    I had my 4L60E out of the car. I cleaned and painted it, installed a b&m shift kit and reinstalled it. Now it won't move in reverse. I checked the installation of the shift kit 3 times making sure everything was right. So I disconnected the driveline and looking from the rear forward the output...
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