What causes cooling fans to come on too early?
I am wondering about this issue about my radiator cooling fans that come on way too early before the engine reaches operating temperature.
there are two wires from PCM for each fan ( one dark blue and dark green)connected to relays.
When I start the engine, fan no 1 comes on a few minutes after engine start up. Upper radiator hose when fan no 1 comes on is around 118 degree F ( using infrared temp gun). The second fan comes on within a few minutes as well when the temperature at upper radiator hose is around 125 degrees F.
Once both fans are on, they keep running.
Will appreciate your input guys on how to address the issue.
When I took my car to a tuner. He said that it did show on the PC that the fans are controlled by the PCM.
I am not sure if he had checked properly or not.
Then, what else could cause the fans to come on at different time intervals and keep running all the time once they are on
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72 Camaro RS:SOLD
68 Camaro:
LS6 Engine,Tremec TKO 600,5 Speed
Complete Speedtech Subframe Kit,Speedtech Torque Arm, 9" Rearend from Strange, Wilwood Brakes, Minitubbed, Hotchkis Subframe Connectors, FIKSE FM5s
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