Question about 1988 Ford Bronco II
Idles rough. Continous speeding up and slowing down after it warms up for a minute or so. New plugs distributor cap and has been timed. Oil changed. Uncertain of mileage. Speedometer cable was disconnected when I purchased it.
Any Hope or Help?
Pull the vacuum hose from the map sensor and if your idle smooths out change the map sensor. About a $20 fix.
Posted on Oct 06, 2008
Interesting problem... I myself own an 88 Ford Bronco II 4wd 2.9L V6. I have issues with my idle reving up to 1500 to 2000 rpms at stop. I have not yet resolved the issue, however, I do believe that sometimes electronic components are to blame...such as the brain or "Mother Board" of the vehicle. I replaced the "Brain" on two previously owned vehicles with instant results. I would suggest the local junkyard for a try...only as a last result. The "Brain" is located on the passenger side along the Interior wheel well. If you look along the front passenger side wheel well inside, beneath the plastic, vinyl, etc....you will find a metal enclosure that is comparable to a computers cd drive or hard drive........Approx. 4" x 6" give or take. The Board will have a wide slot plastic attachment plugged into it...very similar to an IDE slot on a computer.
This is the Brain......for your Bronco II.
Buying a used Brrain is a Gamble ...
You could get a bad brain!!!
BUT...You could get an instant repair!!
Who's to decide?
I had an 1986 BMW 325I
Suddenly One Day....
It started Reving up and down erratically....I was at a loss.
Luckily, I had a friend who was a BMW mechanic, and informed me that there was a relay in my glovebox that controlled my idle. I took a chance and tried replacing the relay with one I purchased at the junkyard...although they wanted $50 for it...I was willing.....and the new /USED idle conrol relay turned out to be an affordable fix. Thankfully
Posted on Aug 28, 2008
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Posted on Jan 02, 2017
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