It is a 2002 2500 4X4 with a 5-speed. It has a Bully Dog Torque Dog chip, cold air intake, boost gauge and lift pump pressure gauge. Mileage is down about 3 MPG?? Truck is pumping out black smoke when accelerating. It takes more boost to accelerate in traffic. I also can almost zero out the fuel pressure gauge when accelerating. Fuel filter has less than 2000 miles on it. Did I get a bad tank of fuel that plugged the filter??? Any ideas what is going on here??

Jeasen

 

Ideas anyone?

 

Welcome to DTR, check for codes with the key trick on, off on off on, and watch your milage.

 

Things to look for:

Boost leaks
IAT sensor
Codes

 

Thanks for your help. I did the on, off, on,off, on thing and these were the codes that came up: PCU 1693, Ecu 0236. Now what do I do?
Jeasen

 

I would have done a search but the site will not let me. How do I reset the codes? I see nothing that looks like a boost leak and my boost gauge goes right up as always. Maybe I should not have got so upset with this guy and should not have smoked him. I am new here but not new to diesel trucks. I just want to get this truck back to normal. All help is appreciated.
Jeasen

 

accoding to the manual that came with my smarty, the codes mean this:

0236 ---> map sensor too high tooo long
1693 ---> dtc cleared in companion jtec module

now, you'll have to find somebody to explain what that means

WR

 

The 0236 code is probably coming from the bullydog.

I would worry about the lift pump with that kind of fuel pressure.

 

I was getting 0237(Map Sensor too low) so I took off my programmer and was still getting it. I cleaned the IAT sensor and Map sensor but it still kept coming back so I just replaced the Map and haven't had any troubles since. Take your bullydog off and see what happens.