I POSTED THIS IN THE ELECTRICAL AREA BUT AM NOT SURE IT IS AN ELECTRICAL PROBLEM.
THIS IS VERY STRANGE. WHEN ACCELERATING, MY FAN WILL SLOW THEN STOP. AS SOON AS I TAKE MY FOOT OFF THE PEDEL THE FAN COMES ON FULL FORCE. THIS DOES NOT SEEM TO HAVE ANYTHING TO DO WITH THE ELECTRICAL SYSTEM. I HAVE A NEW ALTERNATOR AND MY BATTERY IS STRONG. I CAN TURN ON ALL THE LIGHTS (I HAVE 8 WHEN HIGH BEEM IS ON)AND CRANK UP 600 WATTS OF MUSIC WITHOUT ANY EFFECT ON THE FAN. SEEMS TO BE MORE RELATED TO VACUME??
I KNOW THERE ARE VACUME SWITCHES IN THE ENVIRONMENTAL CONTROL SYSTEM.
ANY IDEAS...


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Black 1997 F-150 Supercab Flairside. 4.6L with Superchip, Jacobs DIS, K&N Generation II, Cat back Exhaust with Flowmaster 40 and MEG'S Stainless tip in front of rear wheel (nice rumble). 17" Off Road wheel pkg. Lots of body mods. 5 yrs old and still turns heads...and now paid for!! New is NITTO NT404 275/65/17's and Hellwig 1/7/16 front and 1 1/8 rear bar.

 

Does the fan actually turn off?
The Ford set up is that if the A/C is on, and you hit full throttle the A/C will turn off.
It is possible that your fan is still on but you don't feel the cold air.

If your not running the A/C when this, happens and your fan actually does turn off, then I'm sorry for the response because I'm at a loss.

Mike

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MIKE KIEVIT
1997 F150XLT 4.6l 2WD(2ND OWNER)
Standard Cab
Mcwelco Tool box, 2000 aluminum wheels.
Rough Country 2 inch leveling coils,and rear add-a-leaf.
RS9000 Shocks.

[This message has been edited by MKTRUCK (edited 06-17-2001).]