This just started you can push the pedal to the floor and truck is still at Idle? Just changed fuel filter ect unhooked the chip same problem no smoke just comes and goes but sooner or later you'll have full throttle anyone know whats going on.

 

Do a search for "Dead Pedal"
Either APPS or dying Injection Pump. Any codes?

I think it's the weather warming up????

 

Im stupid i guess What is APPS?

 

The Diesel Truck version of a TPS (throttle position sensor)

Accelerator pedal position sensor. Since you are not progressively opening a throttle on a carb., the truck has an APPS to to electrically decide where the pedal position is, like in relation to how fast you want to go kind of thing...?

Did that help?

 

Accelerator Pedal Position Sensor
Number 18 - also know as the "Bell-Crank", also known as around $340.00 us.

 

yes I had the apps changed from the delership at 80,000 miles kind of the same problem but not like this. I have a 108,000 on her now. I checked the fuel port on the filter i have no pressure when i turn on the key, should the engine be started before i have pressure?

 

Uh not started, but "bumped" as in, bump the ign. real quick. This will make the lift pump run for about 30 seconds. you shoudl be able to crack one of the banjo fittings on the pump or fuel filter to see if you have flow.
Chances are you don't.
Likely what has happened here is that your Lift Pump has died causing your Injection Pump (VP44) to be starved for fuel.

Cycle your key on,off,on,off on (not stated, on) you should see codes displayed in your odometer window.

When you see P0216, you will know without a doubt what your problem is.

 

Put it this way, when you bump the started over, you should hear a horrible whining sound from the firewall area, you hear it?

 

This exact same thing happened to me on my way home from work today. As I was sitting at an intersection my truck idled up to about 1200 RPM and held. After I started driving again I was going along and all of the sudden it just lost power and went back to idle. Everything running fine but absolutely no throttle response.

I pulled over and called the tow truck. Was told it would be two hours. I killed the truck and started it a few times and on about the third start things went back to normal so I drove it home.

The engine light is still on and the code showing up is P2121. Anyone know what that means? I'm supposed to move in five days so I need to get this fixed ASAP.

Truck has 65,000 miles on it.

 

Thanks, i used to hear the lift pump but just noticed last night i didn't hear it. I'll try just bumping the starter tomorrow. Do you know what the fuel pressure should be? I was on another web sight and read you could get a lift pump for 70.00? When I called it was about 300.00 from the delership. Should i just repace it with OEM or mount it on the frame rail like i've been reading about? Thamnks for your Help Terry

 

P2121 = Pedal Position Sensor 1 Conformance Error