Ok ...pvc valve, if one goes bad I would like to know how the motor will react.

And could this cause a reading of #3 missfire ?



cobrah

 

This type of question belongs in the forum of your truck with more specific information. Tell us what truck ya drive and I'll put it in the correct forum.

 

I have a 1997 5.4 Expedition E.B. 4X4 . Thank ya for your guidance for somw answers


cobrah

 

If it is leaning out the fuel mixture, it could cause a lean misfire and maybe #3 just picked it up first. I would check the vacuum hose to it, especially behind the throttlebody. They are known to crack or split and cause a lean condition.

 

Thx. I will try that and see if it's the problem, if not I'm gonna put it in the shop this thurs,

cobrah