05 gt p0191 error code

[Monera3v]

Hey guy's

Been posting on many forum in regards to my issue here
Before I take it into ford.
Issue is p0191, p1237 and the pump is constantly running with the key on (no engine start) but yes it turn off once key is off ,
as the chart below shows i'm seeing 75psi at the fuel rail, and pump is at 0.75 duty (150%?)

can anyone look at this data log and tell me if the pump seem to be bad , i see negative values at the pump, but the tables (pcm and fpdm) is giving positive voltage
Before i take it into ford just wanted some of y'all professional advise!

Thanks!

[Blackmare]

I moved this over to the mustang tech section. I think you might get better answers for this issue there. Hopefully the tech gurus can point ya in the right direction.

[Monera3v]

I moved this over to the mustang tech section. I think you might get better answers for this issue there. Hopefully the tech gurus can point ya in the right direction.

Merci beaucoup!

[Ponyryd]

Sounds like the relay is stuck.

[Monera3v]

Sounds like the relay is stuck.

swapped a relay
swap a fps
swap a fpdm

Nothing change the out come

[Ponyryd]

Maybe you have a shorted fuse box, have you tried banging on it? Regardless I wouldn't go to the dealer, better off at a decent private shop IMO.

[hsousa88]

Maybe you have a shorted fuse box, have you tried banging on it? Regardless I wouldn't go to the dealer, better off at a decent private shop IMO.

Agreed.. down with the dealer.

[Monera3v]

Figured out my issue everyone!
Since I was off Wednesday and Thursday, I decided to strip the car completely

First thing I checked was the wiring harness that runs next to the SJB , it was corroded on the inside, I saw a Black / pink stripe wire and notice that belong / went to the fuel pump module.

So I soaked the wiring in 99% alcohol to destroy the corrosion use a Dremel to clean the rest off and sprayed contact cleaner.

For precaution I grinded all the ground sources.

MAF sensor was BLACK!!!! so sprayed some crc maf sensor , cleaned off the cone

Voila , Everything started working perfectly fine! Also fixed 1 of my dimming headlamp (corrosion repair o the SJB)

I also google that leak issue we have at the cowl where water would come in and ruin the sjb and repaired that with urethane

Thank's everyone who helped me out with this!


So since the pump has been running at 0.75 duty for the last 2 weeks... it pretty much going to take a shit on me soon since it been warned and stressed out and probably should replace it right?

[Monera3v]

Never mind issue is back....

Pretty sure the pump is fubar

[Monera3v]

Problem solved,

Fuel pump shorted out.

New pump in no problem after 400km