i have a 03 3500. i have been having trouble with the loss of power, around 2000rpm. it only does it after it is warmed up and going. When it is cold it run great. I changed the filter. no help. I also have changed the lift pump and a another new filter. still does the same thing. I put a low pressure senser on it that runs in the cab that a ight come son when the pressre drops below 5 psi. It does come around 1700 rpm but it doesnt come on when it is cold. any ideas? it is not showing any check engine light or any code when i do the key back and forth.

 

turbo leaking...hoses leaking...intercooler leak?

 

dont think so. if it was it shouldnt it do it all the time? not just when it warms up.

 

i have got some codes of the truck. need some help on them.p0633,p0483,p0514,p2509,p0193 and p0251. does any one know these?

 

This is what I have for the following codes
P0633 (Sentry Key Immoblizer(SKIM) secret key not entered
P0483 Fan Speed
P0514 Battery temp sensor rationality
P0193 Fuel Pressure Circuit sensor circuit, voltage too high
P0251 CP3 pump regulatorcontrol

P2509 I do not know this code I will check with a friend that works for a dealership. I have the same issue on my 03, but I don't have any codes. I have had the code for P0251 once in the past and had to replace the CP3 regulator. Let me know if you find out what is causing the truck to run like crap, I've had mine to the dealer 3 times with no luck. They can't find any problems, other than they want to throw parts at it on my expense until it is magically fixed.

 

thanks for the info. the reason i got all the different codes is that i was unplunging the sensor on back of the cp3 to see if i was getting full rail pressure. the problem with mine(i hope)is the pop of value on the fuel rail is popped. i have odred the whole rail. they said the pop of value alone was as high as the complete rail with new pop off and fuel sensor on it. i hope this works. i was getting alot of fuel return to my take and then i checked this pop vaule. i will let you know if this fixed it. p2509 is the ecm/pcm power input siganl.

 

is it a manual? is your clutch starting to slip?

 

mine is manual. i replace the rail. didnt fix the problem. This is real starting to get under my skin. ready to trade the bast**d off. I am wonder were to go to now. The injectors or the pump?

 

no slippage. i am still having the pressuere problem. going to replace lift pump again.