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ls3 chevelle runs, need help with the codes

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Old Jan 16, 2011 | 04:30 PM
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71chevellels1's Avatar
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Default ls3 chevelle runs, need help with the codes

Ls3 with ls1 harness and computer. Car starts right up, if i turn it off it will not start back up untill i unplug the injector plugs then fire the car with them off, it back fires then i plug the plugs back in and it fires right up. Codes

p0118
p0342
p0740
p0785
p1860
p1810

Also i extedned the cam sensor plug to the front because of the ls3 cam sensor and also crossed the two wires on the plug. Thanks!
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Old Jan 16, 2011 | 05:05 PM
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Originally Posted by 71chevellels1
Ls3 with ls1 harness and computer. Car starts right up, if i turn it off it will not start back up untill i unplug the injector plugs then fire the car with them off, it back fires then i plug the plugs back in and it fires right up. Codes

p0118
p0342
p0740
p0785
p1860
p1810

Also i extedned the cam sensor plug to the front because of the ls3 cam sensor and also crossed the two wires on the plug. Thanks!
P0118-Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
P0342-Camshaft Position Sensor Circuit Low Input
P0740-TCC Enable Solenoid Circuit Electrical
P0785-3-2 Shift Solenoid Circuit Electrical
P1810-TFP Valve Position Switch Circuit
P1860-TCC PWM Solenoid Circuit Electrical
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Old Jan 17, 2011 | 06:49 AM
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I bet that ECT code is your big problem. See what the Pcm says the coolant temp is and then you may have to check those wires.
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Old Jan 19, 2011 | 09:25 AM
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I am kinda of a noob but what about the reluctor wheel on the crank? Aren't the LS3 58 tooth vs a 24 tooth for the LS1? Forgive me if you have already accounted for that.
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Old Jan 19, 2011 | 04:56 PM
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It's a cam sensor circuit problem. As the ecm doesn't know when to fire the injectors.
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