Mechanics

MY SHUTS OFF WHEN I TURN THE HEAT OR AIR ON

1990 Cadillac Fleetwood

The idle changes and its like the motor works ten times harder
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Darrien
October 28, 2011.




The engine does have to work harder if the AC is turned on.
With the engine running, make sure the coil is still receiving a minimum of 12.8Volts. Also check the heating and cooling system grounds. How long has it been since the engine had a tune-up? Or the air filter and fuel filter were replaced?

Rivermikerat
Oct 28, 2011.


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