Engine/Transmission (1998.5 - 2002) 2001 NO POWER at all????

[dieselman24]

I just put a new injection pump and a lift pump on this truck (01 6spd 4x4) to fix the problem,and it has not even helped it I also changed out the injectors with another set of good stock ones and a fuel filter. . The truck revs up really slow and will not run 70mph flat on the floor the only codes in the truck are 0500 and a 0577 I cant seem to find the 0577 anywhere and the 0500 is speed sensor. . Any hlp would be greatly appreciated. . Thanks 573 202 9999

 

[johncameron]

0577 - Cruise switch failure (open)

0500 - no vehicle speed sensor signal

 

[DCreed]

the VSS may be putting the truck in a torque management loop.

 

[dieselman24]

NO Power

so what needs to happen just unhook the speed sensors???

 

[Bob4x4]

The map sensor can fail and not set a code. With an ECM thinking you have a low boost # it will not allow more fueling. If it is sluggish on take off but not as bad at around 2k rpm ck the map sensor.



Bob

 

[DCreed]

unhook wont fix a lack of signal. does the truck smoke?

 

[dieselman24]

NO the truck does not smole at all and it runs great at idle but it just revs up vewry slow almost like slow motion, its really bad. . I was thinking that we took the map sensor out of my pulling and tried it and it did not help either. When I first put this new vp44 on it I thought it was bad so I had them send me another one and it does the same as the first one. Heck I dont what to do with the crazy thing. .

 

[DCreed]

maybe stupid question ,did you replace check valve on 44?

 

[Graphic man]

are you sure you installed the pump correctly ..... the key on the pump slid into the keyway on the gear?



did you use the key on the new pump?... . you don't want to use the old key way





i am not saying you did anything wrong... . just trying to find out whats going on





Scott

 

[dieselman24]

Yes it comes with a new one so I used it. .

 

[dieselman24]

The key was already installed from the havivg to calibrate it,so I never messed with it. .

 

[Bob4x4]

At this point you NEED to run it with a scanner that shows sensors,boost and EGT gauges,fuel pressure and vacuum gages on the pump inlet side.



Bob

 

[TCluff]

I just recently expierienced sumthin very similar with my 02'. How did your fuel filter look when you changed it? I ended up having to drop my fuel tank and dump the nasty fuel out of it... it came out black! Some clean fuel and a new filter was all it needed! It wouldnt even do 45mph on flat ground... and to think i was going to trailer it 350 miles the next day to get a new injection pump!

 

[DCreed]

you can check by running p/u and return into a bucket of fresh fuel instead of tank.

 

[CSnyder]

Double check with your VP supplier to make sure they sent you a HO pump.

 

[klaybus]

Sounds like my truck when my EZ was throwing a Map sensor low voltage error. Cheap place to start but I had a low voltage map sensor error...



Clay

 

[JR2]

I would say you need to fix the VSS first and then look at the MAP. It sounds like your truck is in limp mode.

 

[DCreed]

I would say you need to fix the VSS first and then look at the MAP. It sounds like your truck is in limp mode.

as was stated. thank you!:-laf

 

[dieselman24]

Ok today the 26th. . I have already took all of the electronics off of my 01 pulling truck to fix the problem and it is still there I have no idea what the heck to do?? How do you properly check the map voltage?? Thaks TJ 573 202 9999

 

[JR2]

Any update??