2003 starting problem
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2003 starting problem
i have a 2003 5.4 sometimes it doesnt start right away, it turns over and when it fires it sound like it stumbles like there is too much gas not all the time but enough could it be the iac valve?
Hotshot
Joined: Jan 2004
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From: St Louis
Originally Posted by uncleglenny
ive had a rough idle since new so from what i read i thought it could be iac valve. if it was a weak fuel pressure wouldnt it do it all the time?
You might have a clogged fuel filter that is delaying the application of full pressure.
Might also have a faulty check valve on the pump that is allowing the fuel pressure to bleed down.
Try cycling the key to RUN but not hitting START. Switch OFF. Repeat several times, they try starting. See if that makes any difference.
Try cracking the throttle while starting. If that helps, the IAC is sticking closed.
Any CEL/SES? You didn't state. If so, get codes.
Steve
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blackmax
Lightning, Harley-Davidson F-150, Roush F-150 & Saleen F-150
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Sep 24, 2004 07:08 AM
