limp mode?
 

ive got A 99 4X4 cummins. its happened twice now! ill be driving along and at about 45mph the truck basically wont get out of its own way. i can put the pedel to the floor and wont go. also check engine light comes on ill drive a few miles and it will just go back to normal. not sure whats going on?

check fuel filter whats the code numbers

idk the codes? i havent hooked it up to my reader. but ill check the filter. ive got an airdog lift pump if that matters at all

i would check your transmission. second gen dodges have a lot of trouble going into limp mode when the trans is overheating or even low on fluid. i had the same problem and then i installed a trans temp gauge. it would get really hot, go into limp mode and cool down, and then when the temp was back down, it would we fine again. just like yours.:humm:

its like there is zero power at all. my brothers honda ruckus moped can beat it in a race at this point. like it will only give me about half throttle power and wont go over 10lbs of boost. could it be something with the vp44?

it could be or ur tps but i had a problem where it would go fine then go limp lol then go then give out and youd floor it and nothing!!! i checked codes and it was tps and injection timing i checked the apps and it was working fine so i check fuel filter andi t was plugged up changed it and its been good since

sounds like a dead pedal check the injection pump

Check your coolant level. I had low coolant due to a leaking water pump and the limp mode kept it from overheating. We added coolant and replaced the water pump and the issue went away.

How do I know if the injector pump is bad?

any specialized diesel shop can diagnose it but bluechipdiesel.com has a check list to help diagnose