Will not idle and NO codes
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Post Fiend
Joined: Feb 2000
Posts: 11,496
Likes: 6
From: Kansas
Will not idle and NO codes
Here we have a '98 with the 5.4L, 104000 miles. The truck had started being difficult to start, (start-die, start-die, start-run). It did it the other day and after about 10-15 attempts it finally started and idled. When it start-dies you can keep it running by using the throttle. Remove the throttle and it dies. It only used to do it when it was cold, now it does it when it's warm. After all this, I have no codes.
Several sensors come to mind. I was thinking the MAF is bad but if it was, it wouldn't run at all, right?
Several sensors come to mind. I was thinking the MAF is bad but if it was, it wouldn't run at all, right?
Thread Starter
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Post Fiend
Joined: Feb 2000
Posts: 11,496
Likes: 6
From: Kansas
Yeah, that had crossed my mind but it seemed to be more of a problem with the 4.6's. I'll pull those and clean 'em out.
It just did it now. Wouldn't idle without throttle and out of the blue it vroom and settled down. Which still makes me lean towards a sensor.
It just did it now. Wouldn't idle without throttle and out of the blue it vroom and settled down. Which still makes me lean towards a sensor.
Last edited by Ultramagdan; May 4, 2007 at 05:47 PM.
Post Fiend
Joined: Jan 2006
Posts: 14,941
Likes: 4
From: North of Normal
Originally Posted by galaxie641
Sounds a lot like IAC, if you unplug them (electrically) you get the same symptoms.
Post Fiend
Joined: Jun 2005
Posts: 7,047
Likes: 2
From: North west La
I'd change the IAC instead of cleaning it. I cleaned mine once & it still quit about 2 wks later. Mine is pita to remove so I'll always change it from now on.
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I had removed one bolt (almost lost new 8mm ratchet wrench under intake) and decided to get the part before removing it. It is not an easy one to get to.
