Need help at work with 06 lly gmc c4500

[C.bowles2]

I have a gmc 4500 06 lly that cranks and no start. I pulled the filter and the wif sensor and bottom of filter was packed full of rust.... I cleaned the wif and put new filter on and nothing. When I pump the filter head it gets hard then looses pressure and gets soft. The highest rail pressure I can get is 700 psi. I clamped the return line and I still can't build pressure. Any ideas? I'm hitting my head against the wall right now. Thabks


05 Chevy LLY
-Extended cab short bed 4x4
-Sinister EGR delete kit
-S&B turbo mouth piece
-Sinister intake tube
-AEM CAI
-PVC reroute
-4inch straight pipe
-Edge CTS juice with attitude plus hot tuning
-PPE race plug and ported FR fitting
-33's

Sent from my iPhone using Tapatalk

 

[C.bowles2]

Also it will build the pressure when I prime the filter head. If I don't pump the filter was it won't go over 200 psi but when primed till hard it goes to near 800psi


05 Chevy LLY
-Extended cab short bed 4x4
-Sinister EGR delete kit
-S&B turbo mouth piece
-Sinister intake tube
-AEM CAI
-PVC reroute
-4inch straight pipe
-Edge CTS juice with attitude plus hot tuning
-PPE race plug and ported FR fitting
-33's

Sent from my iPhone using Tapatalk

 

[C.bowles2]

Got it running.... I released the fuel pressure check valve and primed the shot out of it and it started, I'm guessing the customer ran it out of fuel especially judging by the deposits in the filter.


05 Chevy LLY
-Extended cab short bed 4x4
-Sinister EGR delete kit
-S&B turbo mouth piece
-Sinister intake tube
-AEM CAI
-PVC reroute
-4inch straight pipe
-Edge CTS juice with attitude plus hot tuning
-PPE race plug and ported FR fitting
-33's

Sent from my iPhone using Tapatalk

 

[LtEng5]

good you got it running. :woott:

change the filter out again in a couple hundred miles... if it was run out of fuel; junk will be coming thru for a while..... keep him in your back pocket for a few months and checking in on him...... if the CP3 was run dry for too long, you'll be replacing that next......

 

[C.bowles2]

Ok thanks. I'll tell the customer. It only has 81k on the odometer but hopefully nothing else goes bad lol


05 Chevy LLY
-Extended cab short bed 4x4
-Sinister EGR delete kit
-S&B turbo mouth piece
-Sinister intake tube
-AEM CAI
-PVC reroute
-4inch straight pipe
-Edge CTS juice with attitude plus hot tuning
-PPE race plug and ported FR fitting
-33's

Sent from my iPhone using Tapatalk