Here is what is happing,

Start the truck up and it is smooth. It will then start to miss about 15 secends after it starts. when it is missing the fuel pressure jumps to 42#'s from around 35 when it is running fine. I can then shut the truck off and restart it and it will run and drive fine. The scan tool showed bad O2 sensers in the rear. the O2's would read between 500 and 600 and then drop to 0 when it is missing. I change the O2's and it is still doing it. Changed the mass air too. I also got a code for a oil pressure switch is bad. I don't think that would cause a miss??
Jeff

 

So, your engine is missing ... have you found it yet?

 

I was thinking the SAME thing...did you find it?

 

figured they would take the whole truck instead of just the engine......weird...mabye ill have to pull mine out and take it inside with me every night..........but on a different note a bad oil pressure switch wouldnt cause a miss.....check your plugs and wires...might have a short....sending your computer some erroneous messages

 

for some reason I see this post getting alot of laughs

 

i would have to agree with you

 

Randal9,
Glad you are getting some laughs in, I see you are asking for help in a different section. Hope you get that 4.6 going fast.
Sorry guys if I did not write that it was missfiring.

 

No prob, Bob ... I mean ... Jeff ...

 

.5oo is normal for a cruise condition. Zero, indicates a lean condition, actually an absence of fuel. If you have good fuel pressure, it sounds to me like a bad regulator, or obstructed fuel rail.