Heres whats happening. Will be driving and the truck tries to stall. Sometimes have to pull over shut the truck off restart several times then it will clear up.
This happened Sat but restarted and engine would bog at wot. Then yesterday ran fine but in passing gear it wouldnt run past 4000rpm it was falling on its face kinda thing. Im leaning towards fuel pump (or filter). this has been happening for a few weeks but has gotten worse in the past few days. i did have a code a few weeks back if i recall it was ( P2632 Fuel Pump B Ctrl Circ /Open)


any help is greatly appreciated thanks





2007 5.7 qc 4x4

 

That code could indicate a fuel pump being bad or going out. Your fuel pressure at the valve on the fuel rail on the intake should be 58 psi +/-2.

Other things could be plugs, wires, vacuum hoses/leaks, ECT

 

fuel pressure is 60 but drops to 40 when revved to 4grand . when hunting for idle a sharp blow on the botom of the tank causes a change in the sound of the pump and idle stabilizes for a few seconds then starts hunting again. so................

 

Could be pluged exhaust or fuel.

When it acts up slip it into neutral (keep it at WOT) if it does the same then its exhaust if it rev's up then your looking at a fuel problem

 

If it was exhaust wouldnt it act up all the time?

 

still in a delima here changed the fuel pump ,plugs , cleaned the tb now the hunt is gonw but the bog at wot is still there after the engine warms up............. any more ideas

 

I just had some strange occurrences with my 05 Hemi, turned out to be the gas pedal. Unplugged it while truck was idleing, shut off the engine, reconnected, and all was cured. Could it be the throttle sensor? Either gas pedal sensor or throttle body sensor?

 

update the stealership has had the truck for 2 weeks and cannot replicate the issue im having. is it even remotely possible that the iat would cause this problem.
seems only to happen when the ambient temp is extremely HOT

 

still having problems here .... after about 30 min of driving if i floor it it bogs so bad let off it half throttle it picks up and runs fine any ideas fellas also replaces the cam and crank sensors (no codes at all) im at a loss

 

iat wont do it. i would take it back again to the dealership unless you had a tuner like diablo where you could datalog various PIDs on the engine