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Member ![]() Group: Advanced Members Posts: 176 Joined: 23-January 04 From: Fort Worth, Texas Member No.: 149 ![]() |
This is likely a giant shot in the dark, but I thought I would try telling my problems here. I've posted at every other LS1 message board, including LS1tech.com which I was sure would help me out, but to no avail.
The LS1 was running great in the 94 Camaro, until randomly, one day these problems occured. Symptoms: - Car will barely start, most of the time afterfires and shoots flames out the exhaust, but wont start up. Sometimes it will not start after 10 minutes of trying, sometimes it will fire right up. - Tachometer doesn't work (it used to). When you turn they key on, the tach will move up a milimeter from the bottom and sit the entire time. - *FIXED* Speedometer thinks you are moving. When I let the clutch out after starting the engine, with the tranny in neutral, the speedo goes up to 10 mph. If you rev the engine, it goes up thinking you are moving. Things we've tried/checked: - Ground wires on each side of the dash, and by the drivers seat are all good - Main engine ground strap good - Smaller 2 grounds on each side of the engine bay are good - Every fuse inside engine bay and inside cab are good - Unplugged and plugged back in all transmission wiring connectors - Unplugged and plugged back in the 3 front and rear ABS sensors - Unplugged and plugged back in ABS module connector - Installed new crank position sensor - Installed new cam position sensor - Gone through every connector in the entire harness of the car On LS1tech and everywhere else I received lame responses like (you've got your speedo plugged into your tach!) I don't know anyone else who has transplanted an entire drivetrain into another car and used the stock wiring harness. Seems like most transplants end up with a Painless harness or something else. At any rate, the blasted car is ready to run... if it would just run. Everything else on the car is ready to let it move and drive! /Cries for help |
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#2
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Member ![]() Group: Advanced Members Posts: 176 Joined: 23-January 04 From: Fort Worth, Texas Member No.: 149 ![]() |
Thanks for the help everyone! It lives again!
I pulled the intake off and headed straight for the camshaft position sensor again. I removed the connector, it looked great. I grabbed a multimeter and tried to get continuity between the CPS connector and the connector for the PCM. I went through the 100 connections on the PCM well over 5 times, and never got anything for all 3 of the wires going to the cam position sensor. Frustrated I cut all the loom and electrical tape off the wiring harness for this side of the engine. I followed the cam position wires and to my amazement, they entered the loom for the passenger side fuel rail. I follow them more and ended up at a connector up by the throttle body! Apparently GM in their wisdom send wires from the back of the engine up to the front, put a little connector there, and send them back down to the back of the engine to the PCM. I can only guess this connector is so you can unhook the connection and test the camshaft sensor without having to remove the intake manifold? At any rate, this connector was buggard up. I yanked all the wires out, redid this connection, and put everything back into the looms. Everything looks much more neat and tidy now. Got the intake back on. Went in, flipped my row of switches and she cranked right up. Tach came up, sounded mean as hell, and it's running great. I wish I would have driven the 10 minutes to Autozone for the scanner in the first place, instead of replacing and removing random things on the car. Lesson learned. It really is like working on computers! So thanks for the help everyone. Can't wait to get the racecar on the track. -Kyle |
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Lo-Fi Version | Time is now: 4th May 2025 - 10:03 AM |