Engine/Transmission (1998.5 - 2002) P1389, Dead Pedal

[DLGonzo]

I have gotten a engine light a couple of times now with a 1389 and just before it came on the gas pedal basically went dead. The truck still ran, but engine wouldn't rev. I've also noticed that my fuel pressure is surging past 15 psi. Typical idle is about 13 and running 10-12. At constant highway speeds the throttle seems to be lunging a bit. The engine has never died. Please say this is Throttle position sensor, or somehting simple, and not the pump. Just have 40,000 on this pump.

 

[MCharlebois]

from an 01 service manual... ... ... ... . crank sensor

marcel

 

[TORQUE THIS]

An 01 will have a cam sensor. It's located behind the VP-44.

You might want to check your batteries, and try an APPS reset.

 

[BWillard]

If you need an APPS, PM me I have one for an '01 if it'll work.

 

[DLGonzo]

I've had no problems for a couple of days. How do you do the apps reset. Is it just turning IG to on and slowly pressing the pedal to the floor? I don' think it's my batteries. I've only had these for a little over a year.

 

[TORQUE THIS]

I've had batteries go bad in less than a year... just something to check.

To reset the APPS...

Disconnect the batteries, let them sit for a few hours / overnight, reconnect, turn ignition to ON, slowly push pedal to the floor and slowly return.

Also, check your grounds on the block. There are 2.

 

[Ol'TrailDog]

Wow, I'm suprised Eric hasn't arrived to extol the virtues of "drive-by-wire" :-laf :-laf



Hopefully, his youtful (sic) enthusiasm has been civilized.

 

[RAJohnson]

This is what I use to Reset the APPS.



RESETTING THE APPS SENSOR.

(ACCELERATOR PEDAL POSITION SENSOR)

2ND GENERATION 24 VALVE TRUCKS ONLY.



LIST OF TOOLS NEEDED



DIGITAL VOLT METER

# 20 TORQUE BIT SOCKET

# 1 PHILLIPS

# 10 MM SOCKET



Proper service and repair procedures are vital to ensure personal safety of those performing the repairs. Standard safety procedures and precautions should be followed at all times to eliminate the personal injury or improper service, which could damage the vehicle or compromise its safety.

Although this material has been prepared with the intent to provide reliable information, no liability is assumed in reliance of this material.



It has come to my attention that a lot of people think by disconnecting & re-connecting the batteries and stepping on the throttle it is going to reset the apps, no, that is not correct. It is impossible to adjust your apps if you do not know where it is supposed to be set at. That is why you need the voltmeter.



This is the procedure I use to re-set the apps.



With the key on, engine off you need to probe the apps wire to see where your voltage is currently set at.

The best location to probe the wire is on the PCM (power control module) which is located off the passenger side of the firewall.



• You want the C1 connector, this is the connector closest to the engine,

• You want the orange wire with the dark blue tracer which is pin # 23

• Voltage should read somewhere around 0. 5 volts,

• At this point the voltage reading does not matter, it just has to be accurately written down for later reference.



*** TURN THE IGNITION OFF ON THE TRUCK ***



Resetting the APPS Sensor cont. page 2

(Accelerator Pedal Position Sensor)

2nd generation 24 valve trucks only.



• The apps sensor is located slightly above and a little to the left of the injection pump.



• Remove the black plastic cover that is located by your injection pump.



The two screws that are holding it are plastic, do not put any downward pressure on them or you will never get them off.



• Un do the 6 - 10 mm headed bolts that hold the bracketry in place.

(DO NOT REMOVE THE CABLES)



You will notice the apps is on the back of the bracketry that you just removed, it is held in place by 2 - 20 bit screws. These screws have a little bit of locktite on them so make sure you have a good socket and gently give a little tap with a hammer before attempting to loosen. Be very careful these screws strip very easily and you only get one shot at them.



• On the apps you will find a white tag that gives you the information on what the apps adjustment should be.



• After loosening the screws you can rotate the apps both clockwise and counter clockwise to get the adjustment you need.



• The reading you took at the beginning of the process on pin # 23 should match the white tag on your apps, if not adjust accordingly.

 

[DLGonzo]

Well, I pulled my battery cables off and let it set and went through that deal and no problems today. The problem was at most intermittent, so I may not have helped anything other that making myself reset all my radio presets.