please help
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Joined: Jan 2009
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please help
i have a 94 f150 whenever i start it the idle goes up and down and the voltage gauge does the same , sometime it evens out sometimes it quits, i have repleced the battery and altinator and it got worse...
Posting Guru
Joined: Jan 2004
Posts: 2,403
Likes: 4
From: Charlestown, RI
Does the idle ever smooth out? My 93 does the same thing sometimes, idle goes up and down, etc. If the idle goes low enough, the voltmeter dips down too.
I think your problem with voltage is more due to the idle issue than anything. I'm unsure what my problem is, I'm living with it until I get the time to check things out. I am leaning toward the IAC, and I also have an EGR code that may be causing a vacuum leak and messing up my idle.
I think your problem with voltage is more due to the idle issue than anything. I'm unsure what my problem is, I'm living with it until I get the time to check things out. I am leaning toward the IAC, and I also have an EGR code that may be causing a vacuum leak and messing up my idle.
Posting Guru
Joined: Jan 2004
Posts: 2,403
Likes: 4
From: Charlestown, RI
Any codes from the computer? It may be worth checking the IAC (or IAB, this thing has been called a bunch of things over the years). Here is a link to fordfuelinjection.com that details IAC operation, testing, and cleaning: Ford Fuel Injection Idle Air Bypass (IAB)
There is a bunch of other really useful knowledge on there too, for troubleshooting and repair. It's an excellent site!
There is a bunch of other really useful knowledge on there too, for troubleshooting and repair. It's an excellent site!
