Here’s the story with my truck :


drove it about 90 miles, shut it off, while I was working all day . Went to start it and it just about started, ran terrible and it won’t idle.
i do have 2 codes p0172 p0174 - one bank rich, one lean.
I checked the brake booster vacuum line - it felt loose , but it’s ok.

im trying to figure out what the problem is ? I’m lost !!

the codes make no sense .
any ideas ??

 

Were you able to run it long enough to get it fully warmed up?

 

yes - the truck just runs terrible

won’t idle

 

A common problem is corrosion is the Fuel Pump Driver Module. If you are a northern vehicle and you have not changed it before this is where you should look next. The FPDM is located above the spare tire and is held on by two (10mm ?) screws. Easy to change once the spare is out of the way. Remove the screws and look at the back side of the FPDM it is likely corroded to the point that the printed circuit board is exposed. Road salt eats it up. I am 95% sure a FPDM from a 2004-2008 Ford Crown Vic, Lincoln Town Car and a Mercury will fit and because they are mounted in the trunk (behind the back seat rt center) are unaffected by weather. If you purchase a new one, about $50-$80, it will come with rubber standoffs to prevent the dissimilar metal corrosion. Clean the ground connection.

 

This may help: https://www.fixya.com/cars/t3799850-p0172_p0174

Since its easy, you could disconnect the MAT sensor connector to see if that causes any change.

 

Squidvicious,.......

Did any new codes show up during your troubleshooting?It’s been a few days since you last posted. Have you resolved this issue and if so, please post the solution? Feedback is important so that we all learn solution paths to these issues.

Thanks in advance

Jimboy

 

Squidvicious,.......It’s been a couple of weeks since you last posted. Have you resolved this issue and if so, please post the solution? Feedback is important so that we all learn solution paths to these issues.

Thanks in advance

Jimboy