1999 5.4ltr Stutters
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Give me coffee - Or beer!
Joined: Aug 2003
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From: Who cares?
1999 5.4ltr Stutters
I'm not sure where to begin to figure out this problem. The truck will stutter at idle and while driving. While driving it can be felt, at idle it is not so apparent. RPMs do not change. No codes.
I started to think it was the transmission (because of the driving stutter) but at idle (in drive, like at a light)? 138K miles on the body and transmission. Maybe 14k on the engine. The truck has been sitting for more than 1 year. Driven a few times to keep the wheels round, but mostly just sitting. Now I need to use it as my backup vehicle and it is acting strange.
I started to think it was the transmission (because of the driving stutter) but at idle (in drive, like at a light)? 138K miles on the body and transmission. Maybe 14k on the engine. The truck has been sitting for more than 1 year. Driven a few times to keep the wheels round, but mostly just sitting. Now I need to use it as my backup vehicle and it is acting strange.
Fleet Mechanic
Joined: Aug 2008
Posts: 1,446
Likes: 9
From: NE Iowa JD Country
and more simple stuff....How old is the fuel filter? and you made sure that the air filter is good? ( no mouse nests)
How far did you drive it after getting it out of storage?
If no improvement with cleaning the IAC. Then start looking for vacuum leaks or test how much vacuum there is. Maybe check the fuel pressure, with sitting for extended periods the fuel pump might be showing signs of age and these electric in tank ones do not like to sit.
If you have a scanner that has ability of live data, look to see if there is slight random misfires
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