EATC vacuum leak HELP - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 08-02-2008
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EATC vacuum leak HELP

Ok so thanks to all who replied to my thread last week about the EATC issue. Apparently I have a vacuum leak which is causing it to blow through the defrosters whenever I accelerate. So anyway this is a pic I just took of the vacuum harness which connects to the back of eatc. You will notice in the pic that there is a spot for a vac line but no line. Is this my problem as this is how the harness came. If so will some silicone rtv in the extra hole fix it?
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Old 08-03-2008
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Is it possible the harness was installed upside down?

I would the that you need a port to atmosphere pressure to assist in valve venting. I maybe wrong.


Try some electrical tape on that port see if that makes a difference.
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Old 08-03-2008
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nada I jammed the smooth end of a drill bit into the open port and drove around same problem. However when I put the manual vacuum controls on like you said in the other thread then it worked fine. So does this mean that my EATC unit is bad?
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Old 08-03-2008
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I think it does.
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