my truck has kind the hard time starting sometimes but it turns over. but when i tap the gas hard it dies on me, but when i press gas slow it has little hesitation but rpm goes up. could this be fuel pump related problem?
i just change map sensor. and is still same.
its been doing it for about 2 weeks now i havent really drove truck a lot but this is driving me nuts. i check with my tuner and he think is not tuning because i had tuning over 3yrs with out n e problem and i dont think tune can change itself all of sudden.

fuel regulator or pump or fuel filter? if so how do i check it?

help guys!

 

i 've been having this same problem i took my truck in to the dealer and they said its a bad fuel pump , not enough pressure or something like that my symtoms are .. extended crank . . but once its fired up its fine ..

 

You could hook up a fuel pressure gauge and check it.

 

i was thiking fuel pump too i have extendend warranty but i dont kno if dealer will fix it with warranty. or if not i have to change it on my own.

thanks guys i will check pressure tomorrow

 

On e of the service trucks at work was doing the same thing and after I did a fuel pump I figured out it was the fuel pressure regulator.

 

OMFG guys it turn out to be spark plug wires. i couldn't believe myself for one last try i change to new wires and plugs and its cured
thanks for all ur input guys.
no more stall and runs strong as it used to run.

 

damn, all these problems and it was just bad plugs. Should have checked that first I guess since they're so cheap. Glad your up and running now!

 

yea man it was bad plug wires hahahaha can't believe myself either. but thanks y'all.