Engine/Transmission (1998.5 - 2002) all new fuel system - pressure fluctuations

[Schlickenmeyer]

So after the $600 lift pump murdered my VP44, both are replaced along with the FP gauge the crackheads stole that caused me to not catch the dead LP.

Before it sat at 15 psi and never budged much, now it draws down even at city speeds. .

Anyone running an airdog or fass or similar able to chime in and tell me what I missed?



Gonna re-bleed line to sender, that's all I can think of.



Thanks in advance!

 

[SnoKing]

So after the $600 lift pump murdered my VP44, both are replaced along with the FP gauge the crackheads stole that caused me to not catch the dead LP.

Before it sat at 15 psi and never budged much, now it draws down even at city speeds. .

Anyone running an airdog or fass or similar able to chime in and tell me what I missed?



Gonna re-bleed line to sender, that's all I can think of.



Thanks in advance!

Dirty fuel filter? SNOKING

 

[JLandry]

Assuming the fuel filter isn't clogged, it's possible there's a restriction in the fuel tank inlet (in the fuel tank module). You'd have to drop the tank to check.



As long as the fuel pressure isn't dropping to dangerous levels, I'd just drive it for a few days to see if this behavior changes as air is fully purged from the system. I've noticed the fuel pressure on my truck acts differently when I change the fuel filter for a week or so.



Good luck,



John L.

 

[Schlickenmeyer]

The fuel filters are brand new as well, didn't think about crap in the tank, likely some since it did sit for a while until I could afford the parts.

Will re-bleed the sender line, and take her out for a nice jouncy drive.

Thanx!