1998 EXPEDITION XLT rough idle

[chucka66]

When starting it up in the morning it starts very rough for a few seconds then it idles up this only happens when its real cold out.no codes found . check engine light is not on .

 

[xcaliber1972]

check the pcv valve elbow at the back of the intake

 

[Lane24]

Yup, may have a small leak or crack in it. Mine first started acting like that only when it was cold, then gradually started doing it all the time. The hose crumbled in my fingers at the elbow when I took it off to check. It's a quick easy fix, and a good place to start checking. I would also suggest cleaning your MAF if you haven't don so in a while.

Here's a link about the elbow Xcaliber in referring to.

http://expeditionforum.com/showthread.php?t=4926

Keep us informed if this was the culprit, or the MAF, and if not, we can keep offering some suggestions. Good luck to you.

 

[chucka66]

I purchased a new assembly will install let you know thanks

 

[chucka66]

truck idles fine now.thanks

 

[Lane24]

truck idles fine now.thanks

Awesome!!!!