i have a 2001 cummins with a 5 speed it kinda gutless and has really now exceleration and only gets around 17.32 on my last tank of fuel it should get alot better i would think and when i start it it lets out a big cloud of white smoke and when it kinda cold it misses and sound funny and im not too sure what it is i think it might be the injectors but dont really want to get new ones is there any thing else that would make it bad on fuel and power and make it smoke (white) even when it a little warm and help valied

 

Check for codes whit your ignition key cycle. on off on off then leave on but dont start. if any they come up in the trip screen. When did u last change your fuel filter. Could be really bad. Do you have gauges. they help alot with this stuff. You can have a bad lift pump. need to get fuel pressure checked. Worse case is you vp44 is kickin out. Check all of those things.first

 

white smoke on start up signals a failing injection pump. cycle the key on/off and read the codes in the odometer

 

My truck has been down on power over the weekend it was so i brought it to the dealer as it still under warrenty well they checked it out said it had great fuel pressue and no boost leaks. picked it and it was a whole differnt truck it was runnin like it did not when i brought it in there in the morning????? so if my vp was fine and i had no boost leaks iam tryin to figure out what they did if they even did any thing. could it have been some were i had gotten air in the lines and when they tested the fuel pressue it got the air out with out them really knowing??? iam bogged

 

they prob reset the apps... when i took my truck into the dealership and was standing outside the bay the very first thing they did was unhook the batteries and turn the key to the on position... then he dissapeared so i went and sat down... later on i see him driving it out the dealership so i asked him when he got back what he did all that for and he said its what we normally do... it seems to fix the problem or something liek that..... then he said i was ready to go.. i was like omg you just reset my apps and thats all...and charge me a diagnostics fee....

 

I becha thats what they did. Thats crazy how much my truck seems to run now though its pretty cool. So what does reseting the apps do then??

 

the codes i got was p0500 and p1697 if thats help u figer out my problems

 

sorry it was p1693 the code

 

From what I've found on this list. P0500 is the vehicle speed sensor.

http://www.obdii.com/codes.html

 

p0500 is no vehicle speed sensor signal
p01693 + theres another code for a failer in the pcm-ecm

 

FWIW, just replaced my VSS (on tranny). $31 at dealer, 1" wrench,
about a cup or two of tranny fluid. (knew to have other sensor at
the ready, and not to be laying directly underneath it) Spent more
time on cleanup than changing it.