LT1 in a 93 Camaro pulling timing under load
08-04-2012, 12:47 AM
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LT1 in a 93 Camaro pulling timing under load -93 Camaro
-LT1
-Japanese export model so no EGR or EGR components
Replaced my PCM coolant temp sensor on the front of the water pump. Car straightened out a bit, but still is retarding timing all the way to 0.
At idle, timing is 20-22. Under load, it retards all the way to 0. It never shows knock. Could this be a bad knock sensor? O2 sensors are sort of ok. Right is bouncing between under 100 and above 900. Left is staying right around 140-160 at idle, and as soon as I touch the gas it starts bouncing like it's supposed to. Any ideas?
-LT1
-Japanese export model so no EGR or EGR components
Replaced my PCM coolant temp sensor on the front of the water pump. Car straightened out a bit, but still is retarding timing all the way to 0.
At idle, timing is 20-22. Under load, it retards all the way to 0. It never shows knock. Could this be a bad knock sensor? O2 sensors are sort of ok. Right is bouncing between under 100 and above 900. Left is staying right around 140-160 at idle, and as soon as I touch the gas it starts bouncing like it's supposed to. Any ideas?
08-04-2012, 02:34 AM
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I failed to mention, on the scanner the Knock sensor says 0. It's not actually knocking.
08-05-2012, 11:47 PM
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Sorry, No mods.
Replaced:
-PCM water temp sensor on the front of the water pump
-Plugs with good ol' TR whatever
-Wires with Red MSD 10.5mm
Ordered, but not here yet:
-AC Delco ICM
-MSD Coil
I'm betting its not the opti mostly because according to my Japanese records, it was just replaced in November by the Stealership. However, before I wired my fans to a switch, the car would get crazy hot. I wouldn't let it get to the red line. When I went to start it later (about 30 minutes) it refused. So in the parking lot I pulled a plug and plug wire to test for spark....No spark. I kept playing around under there tapping and touching everything in the ignition system while I had my wife continue to try and turn it over. Out of no where, it started. Ran like ****, but started. I think it's the ICM or the Coil because it's clearly a heat related issue.
Defining the No start condition:
Turned over but wouldn't fire. Brand new Red Top optima.
Haven't had a single issue since I wired the fans to keep the car cool. (With the no start issues)
Replaced:
-PCM water temp sensor on the front of the water pump
-Plugs with good ol' TR whatever
-Wires with Red MSD 10.5mm
Ordered, but not here yet:
-AC Delco ICM
-MSD Coil
I'm betting its not the opti mostly because according to my Japanese records, it was just replaced in November by the Stealership. However, before I wired my fans to a switch, the car would get crazy hot. I wouldn't let it get to the red line. When I went to start it later (about 30 minutes) it refused. So in the parking lot I pulled a plug and plug wire to test for spark....No spark. I kept playing around under there tapping and touching everything in the ignition system while I had my wife continue to try and turn it over. Out of no where, it started. Ran like ****, but started. I think it's the ICM or the Coil because it's clearly a heat related issue.
Defining the No start condition:
Turned over but wouldn't fire. Brand new Red Top optima.
Haven't had a single issue since I wired the fans to keep the car cool. (With the no start issues)
