5.4 High Idle
New User
Joined: Jun 2017
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How did your fix go? I'm dealing with something similar on my 04 Navigator. Conducted a vacuum test (brake booster line) and noticed a lot of a smoke coming from the IAC motor housing. Is that normal? I feel like that should not be the case..
New User
Joined: Jun 2017
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Correct, I did a smoke test to find a vacuum leak. Time to replace the IAC with a Motorcraft one. Thanks for your input.
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New User
Joined: Dec 2012
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Didn't need to replace the control valve, that wasn't the problem... sensor was most likely the issue, but to be safe I replaced that line I linked above. Car runs absolutely perfect with ZERO idle or shifting issues.
I hope this helps.
New User
Joined: Jun 2017
Posts: 24
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I ended up replacing both the vacuum line (tiny, thin line in the upper left corner looking down at the engine bay) and I replaced the sensor I linked above.
Didn't need to replace the control valve, that wasn't the problem... sensor was most likely the issue, but to be safe I replaced that line I linked above. Car runs absolutely perfect with ZERO idle or shifting issues.
I hope this helps.
Didn't need to replace the control valve, that wasn't the problem... sensor was most likely the issue, but to be safe I replaced that line I linked above. Car runs absolutely perfect with ZERO idle or shifting issues.
I hope this helps.
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