Hey Richard or anyone

I talked to you on FSC.com and I am still having problems with this damn truck.

It has the 7.4l and it seemed like it was lacking power. I replaced the injectors, fuel pressure reg, coil, ign module, pump, and tune up. Could it be the coil pickup or maf sensor?

Thanks,
Shawn

I know you just replaced a bunch of fuel system parts but what is your fuel pressure? Key on/engine off, and with engine running? What injectors did you get?

Which year 7.4 is it? Guessing 96-up since you mentioned the MAF, there's no pickup coil in the distributor on the Vortec 7.4's, just a simple cam position sensor and it pretty much doesn't go bad. However the distributors go bad when they get some miles on them. Take the cap off and see if you can move the rotor from side to side. Sometimes you need to gently turn it a little bit, you might see the shaft pop up a little, then see again if it will move side to side. They can wear badly in the top bushing, and also the distributor gear. This will whack your timing way out...and pretty much always set a P1345 code.

Have you pulled a compression test on it?

Richard

It turned out it was the distributor. I pulled the plenum back off and pulled the dist and the worm gear at the bottom was knife edged.

Now I have another problem. The truck is a 2000 classic body 3500 and the tranny is a 4l80e. It just started slipping mildly from od to drive and now it is doing it from 2nd to od. The slip is real quick and it threw a P1810 code which is transmission pressure switch fault.

Do you have any ideas?

Thanks,
Shawn

Yep like I was saying those distributors are crap. Hopefully you got it timed right too (takes a scanner that can read the cam retard figure, set it to within +/- 2 degrees of zero while you're holding RPM's over 1,000 to ensure a good reading.)

Transmission...time to go see an honest shop if you can find one.

Richard