I have no idea why this is happening. I have replaced my coolant temperature sensor for the third time now and the check engine light has come on once again throwing a code 15. The first two times I just replaced the sensor but this last time I replaced the connector as well. It will be ok for a few weeks but then it will just go bad again. Its causing the engine to run really rich and making it hard to start. This is really starting to get on my nerves big time. Somebody please help!!!!!!!!!! Thanks.
bsa

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"If they do not run, Then they will die." - Stonewall Jackson

'87 IROC, 355 TPI,700R4, Trick Flow Heads, Comp Cam, Comp 1.6 Rockers, Lucas 23# injectors, Edelbrock headers, Flowmaster 3'' exhaust, gutted cat,
Mallory coil, Mallory HyFire IV ignition box, Mallory Sidewinder 8mm wires, Autolite platinum plugs, K&N filters, Transgo Performance Shift Kit, Corvette Servo, 2,000 Torque Converter

 

please.......

 

how did you re-connect the wires when you replaced the connector? You should always solder computer/sensor connections. Don't crimp or twist the wires together, any fluctuations in resistance across the wire can affect the sensor outputs. Also, be sure to use a dab of dielectric grease in the connector when you plug it in.

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1996 Trans Am WS6 (Ram-Air)w/K&N, airfoil, Lakewood LCA's and Panhard Bar, Dynomax Ultraflow race muffler
3rd gens formerly owned:
Red '88 IROC-Z LB9 5.0 TPI (can be seen in Featured Rides)
Red '85 Camaro LG4, converted to 355

 

You should also "backcheck" the CTS wires to the ECM to check for an open circuit (broken/pinched wire) or a short. Don't cost nothin'...

 

allright, I'll check that. Somebody over in the TPI forum seemed to think there may be a short somewhere..........
bsa