APPS - Adjustment

[BigBlue]

This is different than resetting it. I did it to mine today and it made a nice difference. Boost comes up faster and smoke is down. You have to measure the voltage that the APPS is putting out then compare that to the voltage that it's supposed to be set at. For example. My apps was putting out .450 volts and it was supposed to be putting out .584 volts. I went and adjusted it and now I'm putting out .580 volts. It's not a major difference but it is nice. I've only put maybe 5 miles on it so far but come wednesday I'll be doing 500 miles a week so I'll give yall a better idea on how it drives.

Instructions:

Tools: Digital Volt Meter, T-20 Torx bit, #1 phillips, 10mm socket

With the key on, engine off you need to probe the APPS wire to see where the voltage is currently set at.
The best location to probe the wire is on the PCM (Power Control Module) which is located on the passenger firewall behind the air intake.

• You want the C1 connector, this is the connector closest to the engine
• You want the orange wire with a dark blue tracer which is pin #23
• Voltage should be 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

Remove the black plastic cover off of your APPS. There are two plastic screws. One on the top and one on the front facing the radiator. It takes a little prying to pull it off.

Undo the 6-10mm bolts that hold the bracketru in place but 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-T20 torx 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 because these screws strip VERY easily and you only get one shot at them (VERY VERY VERY IMPORTANT; They are VERY tight).

On the APPS you will find a white tag that gives you the information on what the APPS voltage should be.

• After loosening the screws (do not remove) you can rotate the APPS clockwise or counter clockwise to get the adjustment (towards the front of the truck increases voltage and towards the rear of the truck decreases voltage)
• The reading you took at the beginning of the process on pin #23 should match the white tag on your APPS. If it doesn't the adjust accordingly.

__________________
2001 QC SB AT 4X4
Adrenaline+7x.010 injectors+HTT 62/71/13ss+Billet DTT=
14.6@96mph (pre billet)

[Jakey's'01H.O.]

my apps is totally shot...lol need a new one...unless my is just way outta whack????

__________________
'01 ETH/SO VP. Airdog. ARP. Nanofiber. Amsoil ByPass. HTT. Quad xzt+. Redline. 220 sticks. FOR SALE. HOLLAND COURT DIESEL PERFORMANCE. WICKEDDIESEL. DIESELNUT COALTRAIN IS THE SH$T

Nice tech article..................... thanks Bigblue

[BigBlue]

No problem. Figured that I shouldn't be the only one to benefit from this. For what it's worth, my buddy had an issue with his truck kinda hesitating when he was cruising or accelerating. Checked his APPS and it was way off to. Adjusted it and it runs like a champ. He did get a P01 something code that had to do with the APPS but it turned off the next time he started the truck. I didn't get that on mine. Once my buddy gets here I'm gonna try it on his and see how it works on his truck.

__________________
2001 QC SB AT 4X4
Adrenaline+7x.010 injectors+HTT 62/71/13ss+Billet DTT=
14.6@96mph (pre billet)

[C4 Max]

Is this good for the 06 models?

__________________
06 2500 Mega Cab 4x4, auto, 3.73. Toyo MTs 295/70/17 on the stockers.

[BigBlue]

You can always try but I don't take any responsibility if it causes any damage. I don't see why it wouldn't because as far as I know they are the same setup. Wire colors might be different though.

__________________
2001 QC SB AT 4X4
Adrenaline+7x.010 injectors+HTT 62/71/13ss+Billet DTT=
14.6@96mph (pre billet)

[mwa3c]

DUMB QUESTION: What is the APPS?

__________________
2002 2500 quad cab 4x4 AT 4.10 gear 24v Holly Blue LP, Boost, FP, Pyro, Trans Temp Guage, muffler deleter pipe

[BigBlue]

Accelerator Pedal Position Sensor. It's located on the drivers side, front of the engine, in front of the intake air horn/elbow thingy. It's got a black plastic cover on it.

__________________
2001 QC SB AT 4X4
Adrenaline+7x.010 injectors+HTT 62/71/13ss+Billet DTT=
14.6@96mph (pre billet)

[mwa3c]

makes sense. thanks!

__________________
2002 2500 quad cab 4x4 AT 4.10 gear 24v Holly Blue LP, Boost, FP, Pyro, Trans Temp Guage, muffler deleter pipe

[Jakey's'01H.O.]

any more progress on this bigblue? i will be drilling mine this weekend to spray with di-electric cleaner...i am also gonna check the voltage...for what ive heard, none are 'bad' they just get corroded...ill be one happy camper once this is fixed...sad i bought an ecm over this though..

__________________
'01 ETH/SO VP. Airdog. ARP. Nanofiber. Amsoil ByPass. HTT. Quad xzt+. Redline. 220 sticks. FOR SALE. HOLLAND COURT DIESEL PERFORMANCE. WICKEDDIESEL. DIESELNUT COALTRAIN IS THE SH$T

[bob4x4]

Originally Posted by C4 Max

Is this good for the 06 models?

No your's is not the same.

Bob

[bob4x4]

Originally Posted by Jakey's'01H.O.

...i am also gonna check the voltage...for what ive heard, none are 'bad' they just get corroded.

You have been misled..............

Bob