Another interesting fan problem
04-13-2016, 06:23 PM
#1
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Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Another interesting fan problem
I am using the stock 1987 (new) relay for the fan on the left side.
When I start the car in the morning the fan comes on right away.
I have replaced the CTS, I have changed the ECM, I have changed the memcal
The prom is programed to come on at 190 off at 186.
I have checked the wire for shorts, there are none.
I turn the key on and have 12 volts at the relay but the fan doesn't start until I start the motor.
I am lost on this one.
Anyone have some input?
When I start the car in the morning the fan comes on right away.
I have replaced the CTS, I have changed the ECM, I have changed the memcal
The prom is programed to come on at 190 off at 186.
I have checked the wire for shorts, there are none.
I turn the key on and have 12 volts at the relay but the fan doesn't start until I start the motor.
I am lost on this one.
Anyone have some input?
Last edited by Dyno Don; 04-13-2016 at 06:27 PM.
04-13-2016, 06:30 PM
#2
Re: Another interesting fan problem
My only question would be ;
Could it be a failure in the heat/ac control ?
I know my fan will come on at any engine temp if I put the control to "Max AC" . If I leave the control in the Max AC position and shut the car off , the next day when I start it stone cold the fan comes right on as well .
Could it be a failure in the heat/ac control ?
I know my fan will come on at any engine temp if I put the control to "Max AC" . If I leave the control in the Max AC position and shut the car off , the next day when I start it stone cold the fan comes right on as well .
04-18-2016, 06:45 PM
#3
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Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: Another interesting fan problem
Turns out it was just a matter of clicking the right box in the chip program.
It can be normally open or normally closed in the fan control area.
I had it wrong.
It can be normally open or normally closed in the fan control area.
I had it wrong.
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