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post #1 of 4 (permalink) Old 06-09-11, 05:22 AM Thread Starter
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Wide Open Throttle Switch

I have a question on another Ford forum. On my 02 Windstar, the ac will stop blowing under acceleration. Once I've gone back to normal driving, it will begin again. Like I stated before, it only happens when going up hills and acceleration (i.e. stop light/stop signs/passing, etc.). This person on the other forum, quoted the WOT (wide open throttle switch). I never heard of this. Can anyone elaborate?

Joe D.

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post #2 of 4 (permalink) Old 06-09-11, 07:31 AM
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Re: Wide Open Throttle Switch

When you open the throttle all the way, the PCM shuts the A/C compressor off. If the air just quits blowing out of the dash vents, it's more than likely a vacuum leak. Check valve, hose or reservoir. If the compressor quits, it takes awhile for the air to start feeling warm.

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post #3 of 4 (permalink) Old 06-09-11, 12:01 PM Thread Starter
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Re: Wide Open Throttle Switch

Quote:
Originally Posted by Bert View Post
When you open the throttle all the way, the PCM shuts the A/C compressor off. If the air just quits blowing out of the dash vents, it's more than likely a vacuum leak. Check valve, hose or reservoir. If the compressor quits, it takes awhile for the air to start feeling warm.
Yeah, it just quits blowing out of the dash vents. I was out there today. I stripped down the cowl (inner/outer) so that I could get down into the engine compartment. I checked all the vacuum lines I could find. I unplugged and replugged. All looked good and stayed connected. The air doesn't get warm, it just stops blowing until it gets back to a steady speed.

thanks again
Joe D.
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post #4 of 4 (permalink) Old 06-09-11, 02:12 PM
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Re: Wide Open Throttle Switch

That indicates a vacuum problem. After it's been off for a while, pull the line that runs inside and there should still be vacuum there. If not, check the check valve. The switch or vacuum motors could be leaking too, but in most cases, it's the lines.

Bert
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