Well I thought the truck was running good... It sat last night and most of today and I went to start her and she fired first crank but idle extremely erratic and had a nasty lope and unloaded a mass cloud of white smoke... New injectors went in a week and a half ago and all seemed well until the lift pump failed. I'm thinking the LP took the VP too. Fuel pressure went straight to 20 psi so that's not a issue. Ran the key trick and got P1693 and then -------- and then P Done. checked for codes and found nothing. 

6 minutes ago, dripley said:

Will that work going back thru the pump? I don't know just asking. Almost sounds to easy.

I don’t know how to do this yet or I’d tell you! Lol. What’s your opinion? Vp or air in fuel?

1 hour ago, Marcus2000monster said:

It never starts hard. It only IDLES like crap when warm. Also it never used to lope when releasing the clutch and it does that now warm or cold. The clear hose is going to tell me if there is air in the fuel. If there’s not I’ll suspect the VP44. Obviously I want to try the cheaper options first and work up to the Vp44. I’m ready to replace it if I have to but not if I don’t have to.

 

1 hour ago, Marcus2000monster said:

How did you pressurize at the Vp44? Air hose?

@notlimah Did you check out the video of what the truck is doing that I posted?

 

Yea I saw the video. Definitely sounds like air, I was misunderstanding your problem earlier though. I think you're easiest fix right now is a new filters. If the problem still exists, I'd check for leaks as @trreed suggested. You shouldn't have any issues checking for leaks that way, just don't get too crazy with the air hose. That'd at least clear you of all the suction lines in the system outside of the fuel module and in tank stuff.

9 minutes ago, notlimah said:

 

 

Yea I saw the video. Definitely sounds like air, I was misunderstanding your problem earlier though. I think you're easiest fix right now is a new filters. If the problem still exists, I'd check for leaks as @trreed suggested. You shouldn't have any issues checking for leaks that way, just don't get too crazy with the air hose. That'd at least clear you of all the suction lines in the system outside of the fuel module and in tank stuff.

Thanks! Iv got Dad picking up the filters in town tonight. 

Good luck.  I'll be watching from the sidelines.  

Just now, Shainer said:

Good luck.  I'll be watching from the sidelines.  

Thanks man! Hopefully I can get to the bottom of this! Headed to town in 30 mins so when I get back I’ll see if the truck still does what it does. I’ll replace the filters either this evening or tomorrow morning. If those both fail I’ll check for leaks doing what ever treed is going to tell  me to do!

1 hour ago, Marcus2000monster said:

I don’t know how to do this yet or I’d tell you! Lol. What’s your opinion? Vp or air in fuel?

It is a toss up my friend. It could be either. I understand your thoughts on the VP. When my ECM  died back in 09, nobody could offer me anything better than check your grounds. Heard that over and over. Me, I was sure it was the ECM but had no knowledge to back that up. So i spent a month or more before replacing it. A VP is a big ticket item also and without some other verification we are hard pressed to tell you to buy one and hope it works. I see to many people show up here after spending 2, 3 or 4 grand chasing problems with parts with no solutions. Dont want you to be one of these folks.

Edited March 15, 20187 yr by dripley

7 minutes ago, dripley said:

It is a toss up my friend. It could be either. I understand your thoughts on the VP. When my ECM  died back in 09, nobody could offer me anything better than check your grounds. Heard that over and over. Me, I was sure it was the ECM but had no knowledge to back that up. So i spent a month or more before replacing it. A VP is a big ticket item also and without some other verification we are hard pressed to tell you to buy one and hope it works. I see to many people show up here after spending 2, 3 or 4 grand chasing problems with parts with no solutions. Dont want you to be one of these folks.

I don’t wanna be one of those folks either haha! Just got

ba i from town guys we’ll start her up ina little while and see what happens...

1 hour ago, Shainer said:

Good luck.  I'll be watching from the sidelines.  

 

What do you think it is?

Alright I started her up and she did it again but it was off and on this time. It would do it for 15 secs and then quit for 10. 

2 hours ago, Shainer said:

I test systems as they function.  Half of the low pressure system operates in varying degrees of vacuum.  Pressurizing may not yield valid results.  Second is how does the FASS pressure regulator, bypass and return work?  Pressurize from the VP back... will that actually send pressure to the tank via the suction line, bypass line, both, or deadhead at the regulator?  I don't know that answer.  You packed the quick connect with grease.  Run it!  If it improves well you found the issue, and you don't need clear line or anything else other than fix that connection or replace the entire assembly with a draw straw.

 

Regulates pressure via a ball and spring system in the return line. 

 

9 minutes ago, Marcus2000monster said:

Alright I started her up and she did it again but it was off and on this time. It would do it for 15 secs and then quit for 10. 

 

Whats then fuel level been? Remind me again what all is done to the fuel module.

17 minutes ago, notlimah said:

 

Regulates pressure via a ball and spring system in the return line. 

 

 

Whats then fuel level been? Remind me again what all is done to the fuel module.

Fuel module is stock. Half tank currently.

Went out and ran her agin. Same thing. I wonder if the grease was thick enough? Or the leak is elsewhere? 

If you fill the tank to the brim you could rule out a leak in the fuel basket.

guess I'm going to order a draw straw from vulcan. 

Stock pickup is too restrictive. 

16 hours ago, Mopar1973Man said:

Stock pickup is too restrictive. 

What’s the difference between the Drawstraw 1 and 2 at Vulcan?

Pretty sure drawstraw 1-2 are for standard fuel module without the in tank pump ‘update.’ The drawstraw 5 is for modules with the in tank pump.

1 minute ago, notlimah said:

Pretty sure drawstraw 1-2 are for standard fuel module without the in tank pump ‘update.’ The drawstraw 5 is for modules with the in tank pump.

Right on thanks. I see here is a 1 and a 1 - 2 which one is right? 

If you call Vulcan they will help you figure out what you need. 

Yea give Eric a call and he’ll get

you squared away. 

Eric is awesome! He answered the phone on a SUNDAY and helped me figure it out! He has earned my bussiness for life! A fine man he is!