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trapped air. When temp needle climbs to 1/4 way, loosen coolant temp sensor to bleed off trapped air in cylinder heads. Air is gone once coolant starts to stream out, but only open slightly at a time. May have to do in increments as trapped air will cause rapid overheat
This usually happens when the gauge on the dash goes bad. It can be the sensor for the water temperature too mounted on the engine. The sensor for the fans will have nothing to do with the gauge
It should be a plug and play if your using the ECM for the 1994 engine. The ECM on the 1996 S10 will no work on the LT1 engine, for one thing the S10 ECM will only command for 6 fuel injectors and will have different injection pulse and so on. The program of the S10 ECM is made for the Vortec as to the LT1 will have different parameter **** as engine running temperature, vacuum readings, and timing.
The most obvious would be the 1994 LT1 runs on a OBDI system and the 1996 is running on a OBDII system. You can still run the 1994 LT1 from a 1994 with a OBDii system ecm, but some of the sensors will need to be upgraded to accommodate for the proper readings the OBDII system will need to have the engine to run right.
If you don't have the right ECM for the LT1, go to the wrecker's and locate one, Caprice, Camero, Firebird ECT.....
Thank you for using fixya and good luck on your project.
At or near the bottom of the coolant reservoir is the coolant level sensor. Are you referring to the sensor that let's you know your coolant level is low, or the coolant temperature sensor.
In 1996 the Trans Am came with an LT1 unless an LS1 was swapped in. Timing is not adjustable in either engine though. Why do you feel you need to adjust the timing?
Coolant temperature sensor is located on the intake manifold, close to the thermostat housing for the 3.4 liter and on the passenger side head for the V8's. Good luck and keep me posted.
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