3500eh

been having lack of power issues with my 03 3500 with 220 ks on it. been like that since i bought used at 100k. never thought much bout it as it is my first diesel, until i rode in a friends diesel. my truck sucked! ran bullydog twice and superchip once. and went through 3 trannys in a year. having now idea what to do i came on this site. got many helpful ideas. found a link to reset my APPS sensor. did not work the first time, but it worked the second time. WOW! i actually have some power.
disconnect batteries
turn key to run
wait at least half hour
turn key off
reconnect batteries
turn key to run and slowly press throttle all the way and hold a couple secs
slowly release peddle
turn key off
wait then start

this actually worked. i am so stoked. try it if you are haveing power issues. i also have bout 2.5 more mpg around town. good luck guys and thanks a lot.

on another note. tranny mech did a volt test on tps or apps sensor. it says i am only getting .5 - 3.5 volts. thinks that is low. dont know if it still is, will have it checked out again real soon. how can i adjust. TIME TO GO DRIVE MY AWESOME CTD. no longer is it crap

TIME

morkable

Another way to do that and easier is to unhook your batteries, after they are unhooked, touch the positive and negative cables together, this will clear the ecm. Saves you a bunch of time

Kevin

3500eh

is that what i did? clear the ecm?? what else will clearing the ecm do?

CDoskocil9

I too wonder about this will clearing the ECM erase the tell tale signs of a programmer Example Key Cycles RPM'S etc????????

expressfish

touch the positive and negative cable together ?!?!? scary..........

bluebull

NO............

bluebull

Just make sure both batteries are disconnected.

3500eh

what about the low voltage i was informed about? .5 - 3.5 max for the tps. what should it be and how can i adjust?

RunninLean

Uhhh why ? With no voltage there is nothing to be concerned about.

BigBlue

The apps runs with very little voltage. The idle setting on my truck is .580v.

CowboyDave

How would someone know to do this? I guess I mean can any harm come from doing this just to see if it makes a difference?

bluebull

No harm at all. All it does is let the ECM learn the throttle position parimeters. Your truck will relearn how you drive.

bluebull

Don't know the voltage parimeters but I suspect your APPS or alias throttle position sensor is getting bad. One day it will crap out. When, only those with mistic powers can tell. My thoughts are that's the reason resetting it allows it to function properly again.

3500eh

thanks. add that to the increasingly big list of things to buy/do to my truck. my truck STILL runs awesome today. finally had power to get her muddy and finally not need a tow out from a k car. where should i add fuel psi sensor to. what part of fuel system would be best?

BAH

OK, being a newby owner, and time replying on this excellent site. What will clearing the ecm do? Is it something that someone should do regularly, like with a computer? Thanks in advance. And thanks for all the great info.