Cooling fan kills motor

J

Jarredpayne

New Member

Aug 6, 2019

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Indiana

Jul 24, 2021

#1

• Jul 24, 2021

• #1

I have a 2002 Mustang Gt with comp cams 270 and a few other bolt ons. Whenever i start the car it idles and drives fine, until the fan comes on. If the car is sitting and idling and the fan kicks on for temperature, it’ll instantly kill the motor. If I’m driving and the fan is on and i come to a stop, it’ll idle down and kill the motor. It never did this before and I’m trying to find a solution

 

Noobz347

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Jan 4, 1985

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Jul 24, 2021

#2

• Jul 24, 2021

• #2

You have either an electrical short someplace or broken ground.


What was the last maintenance you did to the car and when?

 

J

Jarredpayne

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Aug 6, 2019

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Jul 24, 2021

#3

• Jul 24, 2021

• #3

Noobz347 said:

You have either an electrical short someplace or broken ground.


What was the last maintenance you did to the car and when?

Click to expand...

When i put the cams in. This is the only thing Atleast that I’ve noticed that isn’t normal

 

Noobz347

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#4

• Jul 24, 2021

• #4

When did you put cams in?

 

J

Jarredpayne

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Aug 6, 2019

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Jul 24, 2021

#5

• Jul 24, 2021

• #5

Noobz347 said:

When did you put cams in?

Click to expand...

Just a few weeks ago. I should mention that i just went out and changed the tune a little to where the low speed fan was to come on at 190, and the high speed at 200, just to see and make sure they both worked. The low speed fan never turned on, but right at 200 the high speed did and killed the car.

 

Noobz347

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#6

• Jul 24, 2021

• #6

Check your wiring and relays.

 

J

Jarredpayne

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Aug 6, 2019

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#7

• Jul 24, 2021

• #7

Noobz347 said:

Check your wiring and relays.

Click to expand...

I have good power to both the high and low speed fan. The high comes on, low does not. All relays appear to be good and check out with a volt meter

 

KRUISR

10 Year Member

Apr 16, 2015

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Jul 25, 2021

#8

• Jul 25, 2021

• #8

Do you have the OEM fan or some other? Changed the tune? What are you using?