99 f250 5.4l idling problems
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From: River Ridge
99 f250 5.4l idling problems
I just bought a 99 f250 with a 5.4 the coils; injectors, fuel pump and filter had all been changed and was running great. Now it is having high and low idling problems I had it checked out and they told me it was my cam sensor. Changed that and its still doing the same thing and it feels a little sluggish.
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From: River Ridge
the IAC is new.it runs good for a while then it will start trying to stall as im driving.i can turn the key off and back on and it runs good again but then when i stop it will idle high.i dont think it would be a vacum leak cause if i let it run for a few it will idle back down.
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From: River Ridge
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Freshman User
Joined: May 2009
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From: River Ridge
Im thiking it might me the TPS also. cause i tried cleaning the MAF and still the same.(somewhat) now when its trying to idle its trying to kill then idling back up.when i pull the plug on the TPS the idle drops. so guess that will be the next thing..lol..its always something with these damn trucks.. just hope its nothing major sence i just bought this one.
Lead Driver
Joined: May 2003
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From: Lyndonville, Vermont
I wouldn't pick up anything yet..Clearing the codes wouldn't have fixed it. It just had codes because you were working on it. See what code comes on by itself...TPS will set a code if its bad plus you can test it with an ohm meter or a scanner. I can read the value of it at at any angle on my scanner.
Dick
Dick
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Joined: Mar 2011
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From: Medina Ohio
After dealing the the TPS, if you are still having issues I would take it to a Ford Dealer or reputable shop, have them perform a power balance test to see if its a ignition/cylinder problem, and which one.