Engine/Transmission (1998.5 - 2002) what causes a dead pedal?

[SEmerson]

What part in the vp44 is at fault for a dead pedal?

 

[Vaughn MacKenzie]

SEmerson, I doubt it's the VP44. If you're driving and suddenly get a dead pedal and Check Engine light then it means your APPS (TPS) is on the blink.



Vaughn

 

[24V-DSL]

0216 code and dead pedal were very much a part of my first VP44 failure. I don't know what parts are affected, but it's defined as "injection pump timing failure".

 

[Jetpilot]

APPS



Doug

 

[BWillard]

After changing out the VP44 and the APPS, I found my "dead pedal" problem to be the ECM! BTW, I didn't have any codes! :{

 

[JWBoothe]

I had a dead pedal with a code that turned out to be a Throttle Position Sensor.

 

[TimBrunett]

I had the dreaded dead peddle and it was the APPS, which I had tried to adjust. I thought I could lower the idle speed by adjusting the throttle position - WRONG. The code I got said TPS. I was lucky to get it adjusted back for nothing by my local diesel shop.

 

[hpyman123]

Dead Pedal

My dead pedal was the injector pump. It did it twice going home on Thurs then the truck wouldn't start. It has been acting up for a couple of weeks. It would start but take longer (3-5 seconds to start). Thurs. after the dead pedal it wouldn't start until the truck was completely cold. I replaced the VP-44 on Fri. and the truck runs like a champ again.

 

[WShupe]

I know my dead pedal was caused by my injection pump. :-{} :-{}

 

[TMWeber]

I have the dead pedal and code 0216. The truck first did this a couple months ago very intermittent then this last week quite regular, like every 10 min. At first the dealer (still on warranty) thought the MAP sensor needed replacing, that it was defective and thus sending wrong signals to the ECM causing the fault code. I did not replace it. Now several months later the truck is at the dealer again since the problem is so consistant. I'm right at the end of the warranty, actually 300 miles past, but i've had this problem well within the warranty period so if it is the pump or the APPS I'm expecting it to be fixed on warranty. The truck would take a couple seconds longer to start when hot so I suspect the pump. I'll let you know what they find.

 

[cerberusiam]

The dreaded "dead pedal" can have 2 sources, APPS or VP44. Pulling the codes from the computer will generally point to the culprit, if it will throw codes. Sometimes you get no codes until the problem is bad enough for the ECM to flag. Intermittent failures that will reset to ECM paramters in a specified time don't generate codes, only limp mode for a short period.



The VP44 has 2 areas that can cause dead pedal, p0216, limp mode and great annoyance. The solenoid responsible for setting the injection timing can fail to work properly and tell the ECM it can't set the requested parameter. The same solenoid can work fine electrically and the mechanical linkage it runs to set timing will fail and cause the problems. The mechanical failure is more common as fuel quantity and quality has a large impact on how the timing system works. That was one of the areas that was updated in the later pumps and rebuilds to help solve the failure problem.

 

[Reb.B]

if its dead from a stop sign, then its usually the apps. , and it will come up with no communication from tps. Nine times out of ten it will be a timing failure 216 code, and that is caused by lack of fuel pressure and the advance wears out in the case. When the vp 44 is rebuilt it will need a new case.

 

[mhenon]

The dreaded "dead pedal" can have 2 sources, APPS or VP44. Pulling the codes from the computer will generally point to the culprit, if it will throw codes. Sometimes you get no codes until the problem is bad enough for the ECM to flag. Intermittent failures that will reset to ECM paramters in a specified time don't generate codes, only limp mode for a short period.



The VP44 has 2 areas that can cause dead pedal, p0216, limp mode and great annoyance. The solenoid responsible for setting the injection timing can fail to work properly and tell the ECM it can't set the requested parameter. The same solenoid can work fine electrically and the mechanical linkage it runs to set timing will fail and cause the problems. The mechanical failure is more common as fuel quantity and quality has a large impact on how the timing system works. That was one of the areas that was updated in the later pumps and rebuilds to help solve the failure problem.

cerberusiam... . thanks for that explaination. My truck is showing both a 1693 code on the PCU and a 0216 on the ECU. The "dead pedal" condition seems to come and go without warning. Strange thing is... the truck starts and runs fine otherwise.

Anyone know of a reliable dealer in the Boise Id. area? Need to get this fixed before heading back on the road this fall.

Mike

 

[TMWeber]

if its dead from a stop sign, then its usually the apps. , and it will come up with no communication from tps. Nine times out of ten it will be a timing failure 216 code, and that is caused by lack of fuel pressure and the advance wears out in the case. When the vp 44 is rebuilt it will need a new case.

Mine has been dead from a stop and also while cruising.

 

[s2Mumford]

cerberusiam... . thanks for that explaination. My truck is showing both a 1693 code on the PCU and a 0216 on the ECU. The "dead pedal" condition seems to come and go without warning. Strange thing is... the truck starts and runs fine otherwise.

Anyone know of a reliable dealer in the Boise Id. area? Need to get this fixed before heading back on the road this fall.

Mike

I have the same problem, and I'm also getting an 0522 code, which points to the oil pressure sending unit.

I have reset the APPS, and cleaned the MAP and IAT sensors, ran fine the first three or four starts after that, then it goes back to crapping out from time to time.

The weird thing is, if I pull over and kill the engine, then restart it, it runs great.



I don't get it.



I have the Banks Stinger kit, called them, they said disconnect the pump wire, I did, it still had the problem.



If it is indeed the VP44, why does it run great after I restart the truck? .



This is my first diesel, but if it was a gas motor, I'd be sure it was a short or a bad ground...



Thanks

Stu Mumford

 

[mhenon]

Yeah. . I know what you mean. I just made a 1200 mile round trip to Nevada. Had some problems with the "dead pedal" thing several times. On the return trip however it ran just fine and I got over 20 miles per gallon... . just like usual.

I'm going to take it to a dealer soon. . but can live with it for now. Work is just 2 miles from home and it hasn't acted up on short trips.

Mike

 

[SEmerson]

I know my dead pedal is in the vp44. This vp44 is my backup pump and it always has a dead pedel. I have spare vp parts so I was going to change the bad part. But I wasn't sure what it is. I did change the computer on it but I am not sure if that is it yet.

 

[MoparMark]

Mine has been dead from stop lights ocassionally, if I push in the clutch and rev engine to 3k then go again it seems fine. Does this sound like the APPS?

I have not shown any codes and have 15 psi at filter.

 

[TMWeber]

Just heard back from the dealer- it's the vp44. They had the truck for a week but it did not act up for them until the weather warmed up. Time for a pusher pump!

 

[Mike760]

I experienced a similar situation with a dead pedal. I was on the highway and the truck just shut off. I coasted over to the side and started it up again and I was ok for about a mile until it did the same thing again. I started it again and it was running really rough. I pressed the pedal and got nothing; it just kept idling rough. I replaced the lift pump and still had the same thing so I replaced the VP44 injection pump and now it runs great. Whatever goes wrong with those VP44's seems to cut off any response to the pedal.