bulldogepd

I have had some problems in the past with my dad's 2001 qc with auto. he had a smoking problem a year or so ago and the dealer replaced the old lift pump with a electric in tank pump and things were ok for a while. around christmas we had more smoke and a couple of codes pop up.
p1693 Turbo Charge Control Circuit Malfunction
p0216 Injection Timing Control Circuit Malfunction
We took it to the dealer and they reset the computer and basicly said drive it until the light comes on again and we will see whats up. now it has the same codes back and the gas pedal is acting crazy , i'll explain:
When driving at a steady speed the pedal seems ok but to adjust the speed the pedal seems to act like the cable is broke and the engine goes to idle for a few seconds. What ever happens disapears and all power and throtle control comes back, STRANGE!! we have read that there are "super duper heavy duty lift pumps" out there, is that the prob? or is the injection pump living on borrowed time? Is this a 44 pump and does that have to be what goes back on?

lovinCTD59

Sounds like that VP44 for me. You can replace it with a number of different pumps from a basic (stock) VP44 up bump it up to a HRVP44 or equal. Its your choice.. Will you guys be installing the new pump or will the dealer be doing it??

crobtex

I would try resetting/recalibrating the APPS first. It's free, so you have nothing to loose. Check the Tech Facts for the instructions.

Snoking

Do a seach on dead peddle or pedal, your VP44 is failing. http://www.turbodieselregister.com/f...ighlight=drats

SNOKING

bulldogepd

If it is dead I think we will let the dealer do it. Ive done one on a 1989 and almost dropped the shear pin into the timing gear cover. one of the techs said he has a low milage vp44 that he will sell/instal for 350.00 on the side. what do you think about that?

crobtex

Not a bad deal if it's any good. Be sure you know if it's an HO or SO. SO works on an HO truck, but I'm not sure about HO on a SO.

Snoking

My VP44 was low mile with only 52K, but I do not think you would want that. The newest rebuilds are getting the best of everything learned over recent years, and probably wroth the extra cost in the long run. SNOKING

24vCTD

Bulldogepd,
Your sig says you have a 2003? Not sure but I believe '03s and newer have the CP3 injection pump (NOT the VP44)...anybody else know any different? If this is the case I'd talk to the guys on the 3rd gen forums; they may have totally different issues with their trucks than we have with our 2nd gen 24v trucks ('98.5-'02).

Snoking

It's his dad's 2001! SNOKING

24vCTD

My bad...

Guess by the time I finished reading all the posts in the thread, I'd forgotten that he'd said that in the first one...

Bulldogepd, I agree 100% with Snoking that the "low mileage" VP is probably a bad idea. The dead pedal is caused by solder joint failures (which could occur at any time regardless of mileage) in the module on top of the VP; not by mechanical wear. The newer VPs have updated modules that are supposedly not prone to the solder joint failure issue. By going with the used pump you may find yourself right back at square one with $350.00 less to put towards a good pump. I can't imagine too many reasons why a dealer tech would even have a used VP44 in his posession unless he removed it to replace it due to a problem.

lovinCTD59

Im with these guys, I'd stay away from the VP that he wants to sell ya for 350.00. Unless he is giving you the same warranty as a new one.

kevellis32

gas pedal?. Sorry couldn't resist

pdieselpu

Sounds to me like the Throttle position sensor . It goes back to idle and has to be "reset " by putting the pedal to the floor and then to top of pedal. I drove for almost a year tryin to avoid the $700.00 bucks for a new one and then finally gave in. A simple swap but costly.

bulldogepd

Yea, yall are probably right. If we get a used one it will no doubt have the same old problems down the road that this one has. The thing Mike said about the solder joins sounds like a simple repair (but im sure its not). pdieselpu thinks that the t.p.s may be the prob. so how do I trouble shoot this? I think I can replace a t.p.s. myself.

24vCTD

I don't think they would make the solder joints very easy to get to. I asked the same question on here before I changed my VP with no responses. Once I pulled my VP, I found out why--it had tamper-proof torx screws holding the module on; in fact if memory serves I think they were even 5-point torx vs. the standard 6-point torx screws. Plus, who knows--the entire guts of the module may have been sealed in epoxy to keep the elements (and us ) out.

As far as the APPS goes, if you search the Tech Facts section of this site there are writeups on how to check/adjust/reset it. I personally don't think this is your problem though what with the P0216 code you pulled. That is pretty much a definite VP failure code. From my readings on here and other sites, the APPS seldom sets a code and never the P0216. Incidently, the P0216 is the code that steered me in the direction of the VP when I was having the same problem you cited in your first post to this thread, even after I paid my local dealer $81.00 to mis-diagnose the problem as a bad APPS. I changed my VP over a month and a half ago and the problem hasn't come back, and my truck has no codes stored to this day. Good luck, and let us know what you find...