Engine/Transmission (1998.5 - 2002) Dead VP44?

[Froadin]

I think it finally happened to me.

I was WOT passing on a slight grade, and when getting closer to redline, it dropped to idle. I thought it was a dead lift pump, again. But when I pulled over, stopped the engine, then restarted it, it felt like it was only running on two or three cylinders.

I only had two codes, 0500 (I was driving in the snow the other day, which explains this one), and 1693, which doesn't tell me anything. And a dead pedal. I cracked open the fuel filter drain and got plenty of fuel spurting out when the lift pump was running. I noticed the lift pump runs, but is making a different sound then normal.

Got it towed home, took the battery cables off, just to make sure the APPS wasn't bad.

Took longer to start, but still had the nasty rough idle. And ZERO throttle response. Pushing the peddle does NOTHING for me.

I cracked open three injector lines, and I got fuel spurting out. But I really don't know how much is really supposed to be coming out.

With the lift pump running, I get plenty of fuel to the injection pump, but it doesn't sound right (could it be bypassing in the injection pump?).

After trying a number of things and restarting it, it took longer to start. And now it doesn't start.

I don't have access to a code reader right now. Anyone near Yreka CA have one handy? BTW, I was thinking about getting this one for both of my trucks.

http://www.autoenginuity.com/products.html



Ok, so how much is enough fuel with the injector line cracked? I never had to crack one when I knew the VP44 worked fine.

And if mine is dead, I guess it's time to plan for a SHO VP44 from II.

 

[JStrosnider]

I think it finally happened to me.

I was WOT passing on a slight grade, and when getting closer to redline, it dropped to idle. I thought it was a dead lift pump, again. But when I pulled over, stopped the engine, then restarted it, it felt like it was only running on two or three cylinders.

I only had two codes, 0500 (I was driving in the snow the other day, which explains this one), and 1693, which doesn't tell me anything. And a dead pedal. I cracked open the fuel filter drain and got plenty of fuel spurting out when the lift pump was running. I noticed the lift pump runs, but is making a different sound then normal.

Got it towed home, took the battery cables off, just to make sure the APPS wasn't bad.

Took longer to start, but still had the nasty rough idle. And ZERO throttle response. Pushing the peddle does NOTHING for me.

I cracked open three injector lines, and I got fuel spurting out. But I really don't know how much is really supposed to be coming out.

With the lift pump running, I get plenty of fuel to the injection pump, but it doesn't sound right (could it be bypassing in the injection pump?).

After trying a number of things and restarting it, it took longer to start. And now it doesn't start.

I don't have access to a code reader right now. Anyone near Yreka CA have one handy? BTW, I was thinking about getting this one for both of my trucks.

http://www.autoenginuity.com/products.html



Ok, so how much is enough fuel with the injector line cracked? I never had to crack one when I knew the VP44 worked fine.

And if mine is dead, I guess it's time to plan for a SHO VP44 from II.

If your talking about your 01 your code P1693 is a Feul Injection Control Open Circuit Code. Which means that your fuel metering valve in your injection pump is malfunctioning. You may have a POSSIBLE wiring issue from your injection pump to your fuel pump relay and so forth. However, do you have a chip or adjustable fueling device on it? Do you have the factory lift pump still installed or do you have an aftermarket?? But first thing first, get a fuel gauge on that thing so when the lift pump is running so you know how much fuel pressure you have. How about a dirty Fuel Filter? I know my 02 won't run worth a crap with a dirty filter. Possibility of bad fuel? Water in Fuel? If you have any type of fueling enhancement on the truck remove it and see what happens. . Oh here's a long shot... Are you 100% sure you have a good set of batteries??? I checked a truck one time for a similar problem. Rough idle and no start. . I checked the truck over and check the fuel pressures (all were good) found several codes in the puter and they were pump code's. So I misdiagnosed it with a bad injection pump only to find out that the batteries were junk (had enough juice to crank the engine for long cranking periods but not enough to start it). Apparently the batteries were good enough to crank it over but not strong enough to carry all the electronics onboard. I misdiagnosed the truck which was my dumbness but I learned. . Eliminate all of the obvious and the easiest first before pointing out the Injection pump. . I hope this helps you out some???

 

[Froadin]

Yes, my 2001.

Batteries are almost brand new Optima reds.

Fuel filter only has about 1k miles, and it squirts out plenty of fuel at the schader valve at the VP44. Plenty of fuel getting to the VP44.

Btw, for the code.

P1693 (M) DTC Detected in Companion Module A fault has been generated in the companion engine control module.

Meaning, it found a code in the engine's computer.

And yeah, I completely disconnected the Edge Comp box. No difference.

And when I say the pedal does nothing, I mean that when I got it to start, I could stomp the pedal, and it wouldn't change anything, it would just idle (we are talking about 400 rpm range here), and feel like it is trying to rip the truck apart.

 

[JStrosnider]

Sorry about that your Right the P1693 is the Code in the companion Module. A PO253 is the Fuel Control Open Circuit Code. I'm have those problems right now with my 02. However the P1693 is a related Fuel Injection Pump Code (so a dealer told me). From what you are describing it sounds like to me that your injection pump is fried, just not enough to completely keep the truck from running. I would still try to get a fuel guage on it just make sure your lift pump is operating properly. I just hate to see you spend $1500 on a stock Pump or $2200 on Hot Rod Pump and still have the same problem or install the new pump and have this problem again down the road and be back in the same situation. .

 

[JStrosnider]

If you can help try not to run your truck as much as possible because if the truck won't start at all and you do have a bad Inj. pump that usually means that the rotor and shaft are siezed up and the pump is no good for a core. . If the truck starts they haven't completely siezed your core should still be good. Core charges usually run a minimum of $400. .

 

[Froadin]

It still pumps fuel out the injector lines, so the injector pump shouldn't be too bad, so I sure hope I get my core charge.

Btw, the SHO VP44 is $1750 straight from II. $1100 stock.

As for the code issue, it doesn't mean anything about fuel. It's just a code was set on the engine's computer. I have checked these before, and have had it show me overboost, lift pump, etc. problems. So I really need a scantool to confirm this.

 

[JStrosnider]

I would definately get a scanner on it to find out exactly what is going on. The prices I gave you $1500 and $2200 are including the core charge. I just Kent Crowder at Scheid price me new pumps and they were $1100 for stock and $1850 for hot and then an additional $400 for core charge. From my past experiences every time I've had the P1693 it's always been related to the Injection Pump Module. Every time I put the scanner on mine it's always been related to the injection pump because the module for it is reading the boost etc. . and adjusts the fuel delivery accordingly...

 

[KKlingbeil]

1693 doesn't usually mean injection pump... . As said before, it just means there is SOME sort of code set in the other computer. Also, it is possible to have a completely toast injection pump and still get fuel out of the injector lines. I was working on one that II ended up getting that the computer board was completely fried, and it still would pump fuel out of the injector lines, but wouldn't run at all. Sounds like the pump to me, but it probably would of set some sort of injection pump something code for it to hardly run like that. . Get the codes asap!!!

 

[Froadin]

Yeah, I NEED to check the codes, but I don't live near town, and the parts stores don't let you borrow their code readers

I definitely won't replace the VP until I KNOW that is what it is.



Ok, I was wondering if you were quoting install costs or core charges.



I also heard that II has a new brain box on their SHO VP44, so that would be nice.

I don't think I will go with a stock replacement. I figure if I can get my power without tapping the pump wire, that would be nice. I will just miss being able to defuel it, as I normally run with my Comp on 1x1. Which keeps me from blowing smoke, and slightly improves my MPG.

 

[Jetpilot]

I also heard that II has a new brain box on their SHO VP44, so that would be nice

You are correct, II just got the latest and greatest electronics for their pumps! This should make the pumps longevity better... . Give us a call if we can answer any questions.



Doug Smith

Performance Diesel Warehouse

 

[KKlingbeil]

I will just miss being able to defuel it, as I normally run with my Comp on 1x1. Which keeps me from blowing smoke, and slightly improves my MPG.

You can still run the comp on 1x1 without tapping the wire, its just like an ez, except you can adjust the sublevels. Just hook up your comp everywhere except the wire on the vp44, and you will have power 1 with all five subsettings. II is great to work with, i would do business with them again.

 

[Froadin]

Hmm, I had always thought I had to have the pump tapped to actually defuel on the x1 setting. Guess not.

I have heard great things about II, and I like their product.



Doug, I might be giving you a call this week to talk about a few things. Thanks.

 

[Froadin]

Ok, I finally got a scanner and got the codes.



P0237

P0251

P0252

P0253

P1688

P1689



P0237 (M) Map Sensor Voltage Too Low MAP sensor voltage input below the minimum acceptable

voltage.



P0251 (M) Fuel Inj. Pump Mech. Failure Fuel

Valve Feedback Circuit

Problem sensed with fuel circuit internal to fuel injection

pump.



P0253 (M) Fuel Injection Pump Fuel Valve

Open Circuit

Problem sensed with fuel circuit internal to fuel injection

pump.



P1688 (M) Internal Fuel Injection Pump

Controller Failure

Internal problem within the fuel injection pump. Low

power, engine derated, or engine stops.



P1689 (M) No Communication Between ECM

and Injection Pump Module

Data link circuit failure between ECM and fuel injection

pump. Low power, engine derated, or engine stops.



I couldn't find the P0252 description on the Code List post in the FAQ forums.



But, I would say that these all add up to one very dead VP44.



Doug, it was good talking to you today. I will give you call when you are open on Monday and get this going.

 

[Gary - K7GLD]

It's a long shot - but try unplugging/replugging the connector to the VP-44 - might simply be a bad or dirty connection.

 

[Froadin]

Actually, I already tried that one. No difference.



Just to note, I had been able to start the truck a few times after it died, but it got harder to start each time. And now it won't start. It pumps fuel out the injector lines when I have them cracked over and turn the motor over. But it doesn't even try to start anymore.

That and once it had the dead pedal the first time, I never had any more throttle response when I did start it.



Looks like I will have the latest version of the HR VP44 in the truck before the end of next week.

 

[AVNote]

that's what happened to my 99 i only got three codes p0251, p0252, p1688. The Mac tools scanner i used said the 252 code is, manuf. control, Aux. Inputs, Aux Outputs. but what that means i'm not sure. but as far as I can tell it all leads to a dead VP-44.

 

[Froadin]

Well, just put the new SHO VP44 in from II/PDW (thanks again Doug!).

A couple hours some SLOW work, cleaning up more then working, and now my truck is running GREAT AGAIN!



Of course my EGTs are up, a BIT. I guess the old VP had been on a long drawn out death. My mileage had been going down the last few months. But I just that that was the move out to Cali and the different fuels. Sure hope my MPG goes back up now with the new pump.



Looks like I will be getting that new cam sooner rather then later. As if that pump didn't cost enough!!!

 

[Bobalos]

Pardon my ignorance, but what/who is II?



thanks

Bob

 

[AFarmer]

Industrial Injection

 

[Bobalos]

do they have a web site?



thanks mucho

Bob