Question about idle adjustment.
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Senior User
Joined: Nov 2012
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Question about idle adjustment.
guys my dads dad has a 92 ford f150 with a 302.
the problem is, it has a really high idle. you pretty much can put it in drive and it will idle up and down the road,hell i let it idle from behind the building(its a little bit of a hill and a ditch)where i live,
can anyone tell me where the idle adjustment is on this engine?
or could it be somthing else?"
the problem is, it has a really high idle. you pretty much can put it in drive and it will idle up and down the road,hell i let it idle from behind the building(its a little bit of a hill and a ditch)where i live,
can anyone tell me where the idle adjustment is on this engine?
or could it be somthing else?"
Logistics Pro
Joined: Mar 2005
Posts: 4,698
Likes: 47
From: Mexico, Missouri
Check for codes. It sounds like vacuum leak, but could be anything. There is a throttle stop screw, but don't tamper with it.
You can pull codes with a paperclip or analog meter for free or a code reader for about $35.
You can pull codes with a paperclip or analog meter for free or a code reader for about $35.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Idles speed is computer controlled so there are no adjustments just a base throttle plate setting that should not be altered, so if something is out of whack the computer won't control it properly. Possible causes range from a sticking throttle cable to a worn throttlebody, to a gummed up IAC valve or a TPS sensor with a dead spot, or you could have a large vacuum or gasket leak. As suggested pull the codes first, if nothing else that will eliminate a bunch of electronic possibilities and then you can focus on the mechanical issues.
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