chevychick24

hi,

so heres my problem i went on a camping trip and on the way there driving two hours my truck was fine and only used an 8th of a tank, then on the way back she started running rough and resisting from take off and drank over a half of a tank so then she started throwing out codes saying she is misfiring on injectors 2 and 4 so i changed those two and the 02 sensor one the bank side it was misfiring on and no change the engine light didnt come on as much but still having the rough idle like she wants to die and the resisting from take off its like she is now starving of gas and all i can think of is that my ecm has gone cause i checked and pulled everything apart the fuel lines the fuel pump and changed the 02 sensor the two injectors that were misfiring the fuel pump and nothing the injectors helped a little just when it comes to the engine light not coming on as much, i want someones advise cause i have got a ecm lined up and i want to know other people opinions if thats ok. i have heard of this happening before to an 03 model half tonne. please give me your feed back

thanks

Speedy650

did you check your timing?

lukemoore646

how many miles are on the truck? also what engine is in it? spark plugs come to mind but only because you didn't mention it above, also the wires, i dont want to sound like a jerk but its just not a good idea to start throwing parts at a problem without looking at all of the options, another thing to try is cleaning the mass air flow sensor, its located just above the air filter, when those get dirty they do some interesting things

therewolf

I agree with Lukemoore66, those hot shirt "100K" Iridium spark plugs only last about 55-60K,tops. At 55K they were ready to melt right off the sides of my 2500HD.

chevychick24

i changed all the spark plugs on it and wires i have checked sensor after sensor i made sure air was flowing thru the exhaust right i did everything to fuek lines off flushed them the only thing everyone is thinking is hat its the ecm it the only thing we didnt change.

thanks so much for your replies

chevychick24

oh and its a 2500hd v8 vortec engine