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1995 Chevy Corsica Override the temp sensor

Tiny
PAPAOWL64
  • MEMBER
  • 1995 CHEVROLET CORSICA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 13,300 MILES
Can I run the engine without the thermostat installed, I.E. Cold and make the PCM think that the engine is warm?

I understand that without temp indication the PCM puts me in "limp mode" very poor gas mileage! Car runs great no smoke etc otherwise if run cold!

I have a warped head and Blue Devil Sealant works just fine as long as the block remains cool. Normal temp 180 opens the leak to far for the chemical to close it! I just use the car for local trips and do not intend on a major engine repair. Even running with no thermostat I get some heat in winter inside!

Can I somehow supply a false temp present signal to the PCM (computer) to get out of "limp mode"?

Just want to McGiver it if possible?
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Saturday, January 30th, 2010 AT 9:53 AM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
I dont suggest doing it, due to emissions laws. But if you were to look in the perfromance industry, you would probably find a coolant sensor that was calibrated to do exactly that. May have to look for older car applications.
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Sunday, January 31st, 2010 AT 8:00 AM

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