TPS/APPS issues.
 

I am getting a p0122 code (TPS curcuit low input) and am having dead peddle while driving.:argh: If I fiddle with the wires coming from my APPS it will run fine for a while then go back to having dead peddle.:dang: On my Edge it has a throttle % view. When it the dead peddle accurs while maintaining a constant peddle level it will show it going from 35% down to 20% then back up then to 17% ect... This will accur at almost any peddle level below 50%. Before I go out and spent the $400-500 for a new APPS does anyone have any suggestions of what to check. I am stuck on an island until Tuesday so all I can give you are simptoms right now but if I have a list of things to go through it will make life easier for me when I go to check it out.

If you need a new one it's about $160 from Timbo APPS. They're is info and a link on here someplace if you do a search for them.

Have you tried adjusting the APPS volatage yet?
Had the same code on mine, adjusted the APPS and all has been well for the last 6 months.
Here's the write up:
APPS location varies ,it can be mounted at the drivers side front of the intake plenum or mounted beneath the drivers side battery.

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 (Please use a suitable backprobing adapter for your meter lead, do not pierce the insulation as this can lead to water intrustion/corrosion.)
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 bracketry 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.

Try just re-adjusting the APPS before you pull it apart. https://www.dieselbombers.com/24-val...tomy-apps.html

I had planned to try to adjust it. The thing that gets me is I am only moving the wires that plug into it not the APPS it's self. (I am going to check the wires for breaks and worn sections.) Is the little bit of movement that the plug is receiving affecting the APPS?

Try a little dilithium/dielectric grease on those connections to make sure they get good contact.

I will use the grease. I did pull the plug when the symptoms started and luckily there was no corrosion or burns on it.