[JeepHauler]

I just bought this truck the 24th and I think it may have a bad APPS. Here are the symptoms.

When I first get on the road in the morning while the truck is cold, the rpms will fluctuate slightly while I accelerate. Also, every so often, while I'm driving I'll let out of the throttle from a cruise and go to get back in it and have nothing(its like the truck is stuck at idle). I can pump the accelerator pedal several times and its like I make contact and the truck takes off as usual.

BTW, the truck is a 2001 4x4 Quad Cab 2500 4x4 Auto that is bone stock with 230,000 miles on it. It looks as if the injector pump and lift pump were replaced not too long ago as they are much cleaner than the rest of the engine.

I really hope this is as simple as the APPS. The CEL is not on, but I will be taking it to my buddies shop to scan for codes.

 

[98.5HOTROD]

Better check for codes first before you do anything. Won't the 2001 do the key thing and show codes in the odometer window. Turn the key on dont' crank truck, then turn it off do this 3 times, the last time leave the key in the on position it should flash codes in the odometer window.

 

[JeepHauler]

Pulled the codes and got the following.

P1682
P0500
P0460
P1693

 

[98.5HOTROD]

codes

01682-charging system voltage too low
0500-no vehicle speed sensor signal
0460-fuel level sending unit no change over miles.
1693-DTC cleared in companion jtec module.
First thing I'd do would be to check the batteries make sure there good up to charge. Clean all conections, as these trucks need good voltage and grounds to work properly. Clean any grounds you can see also.

 

[JeepHauler]

Aright, I'll clean the posts and terminals this evening and run it buy one of the auto zoos to have them check the batts. I'm going to do a full service also and replace all fluids and filters.

Do you think the VSS error is related to the charging sys?

 

[98.5HOTROD]

Don't know these trucks do weird thing if its a electrical problem. But good batteries and clean connections at battery and all grounds is important.

 

[JeepHauler]

Don't know these trucks do weird thing if its a electrical problem. But good batteries and clean connections at battery and all grounds is important.

Well, I should have waited a little longer on the codes. All I got was the PCM codes. GUESS WHAT!!!! I GOT A P0216 ON THE ECM. :RANTIN::RANTIN::RANTIN::kill::S:

I gues I need to read up on who to get a PCM from. A guy I know here in town says he can get a new one straight from Cummins for $1k, but I'm not sure about this.

 

[98.5HOTROD]

O216 is the death code for the vp44 injection pump, bad vp will also cause dead pedal. A new vp44 fixed my dead pedal.

 

[JeepHauler]

Good news is I bought the truck cheap. Bad news is it was all I could do to buy the truck lol. I'm pm'ing vendors for prices. It looks like I know where uncle sam's rebate check will go.

 

[Gotemhatin blacksmoke]

My 99 5 speed is dead pedaling. I ran the codes and one came up as tp sensor does not agree with map. Would that be the APPS?

 

[CALIPERF]

Check for ecm codes you may get the o216 death code, it will cause dead-pedal condition, same thing happened to my '99 it may take awhile but it will lay down at the most inconvenient time. Midwest fuel injection has vp 44's for just over $1k, keep an eye on lift pump pressure and use some fuel treatments or twc-3 2 stroke oil in your fuel to keep ip lubed

 

[Gotemhatin blacksmoke]

My vp is only a year old and i have a fass on it so i dont think its the injection pump.