Question 95 TA LT1 ignition problems--help - LS1LT1 Forum : LT1, LS1, Camaro, Firebird, Trans Am, Engine Tech Forums

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post #1 of 3 (permalink) Old 01-19-2011, 03:26 PM Thread Starter
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95 TA LT1 ignition problems--help

Any help is appreciated. History-- 2 months ago the car had a slight miss under a load. Replace coil with a MSD and problem solved. 1.5 months ago while driving at 70 mph on highway lost ignition with no warning. Towed car home to find ICM bad. Replaced ICM problem fixed. 1 week later, started car and let warm up for 3-5 minutes and took off, 6 miles later lost ignition again with no warning. Towed home to find no fire so I replaced ICM (warranty) and it fired right up. Problem not solved, it shut off after 10 minutes (160 degrees). It would hit on occassion while trying to start with about 10% throttle. Checked fuel pressure 51 psi key on and 48 psi starting. Could see a very slight drip from waterpump, so I assumed that the opti had drowned. Replaced opti (gm) and waterpump. Scan tool showed no injector pulses now. Replaced ECM (used) no change. Replaced ECM (new) no change. 1 hour ago.
No theft light on so VATS should be fine.
Help me out guys!! Thanks in advance.
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post #2 of 3 (permalink) Old 02-12-2011, 08:24 AM Thread Starter
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problem found and fixed

After all that was changed it turned out to be the opti harness. I will be posting the 2 extra ecms soon for sale. Thanks
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post #3 of 3 (permalink) Old 02-12-2011, 08:27 AM
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Lol easy fix
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