I have an 01 standard output, that has started to stumble at half throttle. I am gonna change the fuel filter this afternoon, it hasn't been changed since Nov. when I bought the truck. If that doesn't help what else could cause this? I have checked the codes and it shows none. I am really gonna kick myself if it's the VP, as I have a Fass sitting in the backseat waiting for a warm weekend to install. I just installed gauges this past weekend, but the FP is not hooked up because I would have to move it again when I install the Fass. Any ideas?

 

what has the fuel pressure been doing reecently, that is the million dollar question. a filter could contribute to the stumble, as could be bad fuel, bad pump/s, an air leak, various sensors, APPS, etc......do the boost and egt's seem normal? any difficulty starting when warm, did the tach tweak out when it stumbled, it could be a variety of things......your fp reading is going to tell you quite a bit.

 

Never mind, figured it out.

 

Out of curiosity, what was it?

 

Dead LP and VP, left me waiting in the parking lot for a tow.