Suspected VP44 Failure-Would like verification
 

Hello All, I have a 2000 Dodge 2500 4X4 long bed with 190K miles. Totally stock until a couple of weeks ago. I have had NO problems with the fuel system in the entire 190K miles. It died on the way to work. A couple of chugs then instant death! We brought it home and I started research as to what might be the cause. We tested the lift pump and got NO output after the filter. I decided that at a minimum, it was time for a new lift pump. I bought an Air Dog Raptor 100 and a fuel gauge and installed them. We bled the injectors and got the engine running. It ran fine so we restarted a few times and took it for a short spin (4-5 miles). Brought it back and talked as it idled for a couple of minutes then pulled back in the shop to fix a small fuel leak. We tightened the fittings and attempted to restart and it would not start. We thought that it might have lost it's prime so we attempted to bleed the injectors at the head again and we got NO fuel at the head EXCEPT at #4. After it failed to start the Check Engine Light came on. It never had before. We checked and it threw ONLY a P1693. We suspect that the pump is bad but would like to hear some verification from someone with more experience than we do that it is bad. Thanks in advance!

If your not getting any fuel to the fuel lines then its the VP44.

How are you checking codes?


You waited far too long to install the new lift pump and pressure guage. Once you run without any fuel pressure, in most cases, its too late to put in a new lift pump. As Luke already said, a cracked injector with no fuel coming out is a telltale sign of a dead Injector Pump. Its time for a new VP.

sounds like u got a good truck if u aint had no fuel system problems until now with 190k. i work at a dodge dealership on dodge diesels and also i own a 1999 3500 that has a few modifications. first off the p1693 is jus a code that will say dtc detected in the pcm, which normally doesnt mean anything. that code has been in my truck ever since i bought it 80k miles ago and i tried clearing it with a dealership scan tool and it hasnt cleared. the most common problems with the 98.5-02 24v diesels is the lift pumps goin out because of poor design, and even if the factory lift pump goes out the truck can still run because the injection pump can pull enough fuel to run the truck, but since the injection pump is cooled by the fuel being pumped through it, when the lift pump goes out the injection pump starts to over heat and causing the rotary valve inside the injection pump to eventually sieze. since ur only gettin fuel out of one fuel line at the head, then most likely the injection pump is bad.

Give Tony a call. Mighty Diesel - Diesel Performance Parts For Cummins , Powerstroke , Duramax And More he'll take care of ya.:tu:

ya thats good if you made it 190 with out any i bought my 01 with 158k on it they said the fuel system inclding injectors had just been replaced it was all stock i got 25mpg drivin the 300 miles home straight piped it put bigger tireon it the mileage went to sh*t then late one night 4 months after i bought it it did the same thing chugged then died put fuel in it the next day no pressure afer the filter lift pump went and took the vp with it put a fass system on it and stock reman vp and the only problems its had since wa fitting leakin difinitly need to replace the vp. if it were me i would replace it with a ho vp mine is standard i just thought i would add that they got remaned ho vps at xtremediesel.com

We have some nice VP44's with new electronics for a great price.

I am currently looking into replacing my VP44. chip at Blue chip diesels helped me diagnose mine. From everything ive read on here though DO NOT go with a HO pump the SO's are much better bases for building reliable power. Most guys running HO's try and switch to SO's if their's die. Just my $0.02:c:

Not to hijack the thread, but can you put a SO VP on an HO cummins?