Strange idle
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Junior User
Joined: Jul 2005
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Strange idle
When I went to start my truck tonight it started fine but it idled like it had a radical cam in it, RPMs were about 350-500 a blip of the skinny pedal fixed it but I was just wondering what caused this? 1990 F250 460 5Speed 4X4
Last edited by 1990F2504604x4; Jul 21, 2005 at 03:29 AM.
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Joined: May 2005
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From: orange county and LA
i agree. mine use to do the saaaaame ol' thing. i'd be at a light, then my rpms acted funny, then it'd crap out on me. cleaned up the IAC valve with some throttle body cleaner that i got from auto zone for like 4 bucks. i also cleaned the throttle body. there is also a hose (a small one) that is connected to the main intake hoses. it runs into the upper intake manifold. remove that and give the manifold end of it a thorough cleaning. that should do the trick. it did for me in my '90 F250 460. :]
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Well the TPS is fine, so is the IAC cleaned it about 2 months ago, the coil was not getting 12 volts, only getting about 7-9 at idle, checked the alt and found that when my fan went(pics in gallery) it did bend the pulley shaft and the bearings are shot, only puts out a max of 30 amps according to Kragen and running off the batt below 1200RPMs, funny thing is I had no batt. light and the volt gauge showed "normal"
, new batt. coil, and alt. and she's going good now, I am actualy surprised it started on that batt. since the alt. killed a cell.Thanks for all the replies. Will need you guys in the future when something else decides its had enough.
, new batt. coil, and alt. and she's going good now, I am actualy surprised it started on that batt. since the alt. killed a cell.Thanks for all the replies. Will need you guys in the future when something else decides its had enough.
