I think the shop I took my truck to found out why it is throwing a PO300 random misfire code.They put gauges on the fuel lines and they said it is the fuel pressure regulator.It will be done on Monday morning.I hope that is all it is.They said the injector are fine.It was idleing rough but when I was cruisin it was fine,it was only a rough idle.I changed the plugs,wires,fuel filter,dis.cap and dist. rotor and that did not fix it.So I hope it is just a fuel pressure regulator.I do have a question though guys,if the fuel pressure regulator was bad can it make my truck run rich?
Thanks guys
Later

 

i hope they get it fixed up for ya. not sure on running rich and all but i would imagine it could go both ways if it were bad.

 

I guess it could run rich depending on how it is stuck....open or closed. They have to take the top portion of the manifold off to get it but its not a big deal. Hope that fixes it for you.

 

I got it back today and that was it.just a fuel pressur regulator.Thank god it was it.It runs so smooth now.Thanks guys for all the help.