1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
Joined
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17,622 Posts
Agree. The coolant temp sensor to the PCM is the 2-wire sensor at the thermostat housing and must be unplugged while setting timing. It will turn on the 'Ck eng' light, but the code can be erased by disconnecting the battery after the timing procedure is completed.
The single (violet) wire temp sensor near the #1 plug is for the dash temp gauge only.
If nothing can be found with the way the engine is running, then the transaxle lock-up torque converter clutch (TCC) may be staying on hydraulically. Unplugging the TCC electrically by the 2-wire plug next to the dipstick may make no difference if the problem is the TCC staying engaged hydraulically from an internal transaxle leak or TCC venting valve restriction at the valve body.
The TCC solenoid gasket on the valve body has a screen to trap debris. If this screen plugs up then the TCC can't vent pressure and it will stay engaged and will cause a stall when put in gear. Or if you are driving, it may lug the engine down to a stall when coming to a stop unless you slip it into neutral.
I have fixed these by simply cleaning the screen, but this may be temporary as the debris is probably clutch lining material and it will accumulate again. This probably means that the transaxle will need a rebuild, cooler flush and reman t/conv soon.
The single (violet) wire temp sensor near the #1 plug is for the dash temp gauge only.
If nothing can be found with the way the engine is running, then the transaxle lock-up torque converter clutch (TCC) may be staying on hydraulically. Unplugging the TCC electrically by the 2-wire plug next to the dipstick may make no difference if the problem is the TCC staying engaged hydraulically from an internal transaxle leak or TCC venting valve restriction at the valve body.
The TCC solenoid gasket on the valve body has a screen to trap debris. If this screen plugs up then the TCC can't vent pressure and it will stay engaged and will cause a stall when put in gear. Or if you are driving, it may lug the engine down to a stall when coming to a stop unless you slip it into neutral.
I have fixed these by simply cleaning the screen, but this may be temporary as the debris is probably clutch lining material and it will accumulate again. This probably means that the transaxle will need a rebuild, cooler flush and reman t/conv soon.
