Fans On after engine off?
Thread Starter
Racer
Joined: Jan 2006
Posts: 288
Likes: 1
Fans On after engine off?
Does anyone know if the dual fans on a 1991 Corvette are supposed to run for a certain length of time, or until the engine reaches a certain temperature after the car is turned off?
Melting Slicks
Joined: Feb 2005
Posts: 2,135
Likes: 0
From: Sebastian Florida
St. Jude Donor '06
If the car is over the temp set by the ECM, the fans will run after the car is turned off. This is to prevent an overheated engine from being damaged. Your car is fine.
Race Director
Joined: May 2006
Posts: 10,691
Likes: 71
From: Phoenix Arizona
I would lean toward shorted relay, here in AZ, we ground the ecm connection (at least on the 84-9's) so the fan comes on when you start the car, the relay coil voltage should only be hot in start, run, or ign. on.
Burning Brakes
Joined: Jul 2004
Posts: 806
Likes: 0
From: Langley B.C.
Originally Posted by Randy93
If the car is over the temp set by the ECM, the fans will run after the car is turned off. This is to prevent an overheated engine from being damaged. Your car is fine.
Thread Starter
Racer
Joined: Jan 2006
Posts: 288
Likes: 1
Just Curious
I was just curious. I thought they used to come on when my car ran at the factory settings before my modifications a year ago. Now, my car in hot Florida with the A/C on rarely reaches above the 1/2 way mark on the instrument cluster. I have a Holley Ram Port Injection unit on my Vette with the right rear drilled out for the water passage. There is a hypertech thermomaster chip in the car with a 160 degree thermostat along with 2 small 1/8 holes I drilled in the top of it. The shroud has been opened up more in the front, & the license plate was opened for more air flow. The air filter is now a K&N (the larger model--there are 2) that fits directly on the throttle body. The filter is modified, so the air temp sensor can fit into the end of it. There is a hood scoop to allow hot air from the radiator out of the engine compartment. The water pump is an Edelbrock Victor. The car is no where close to stock. The distributor had to be changed to the smaller style with a separate mounted coil. Was it worth it? You bet. The car is faster, cooler, & I can take the intake off with the same 8 bolts Chevy used in the past. These mods for a cooler engine might be bad for some (especially those up North), but it works great for me.
Thanks for the responses about the fans. I just couldn't remember.
Thanks for the responses about the fans. I just couldn't remember.
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