I am exhausted dealing with my diesel but i cant seems to quit. Here goes, i had a 1992 cheverolet 6.5 liter pick-up truck and had the motor taken out and transmission rebuilt and placed it in a 1993 quad cab dually along with the wiring harness. the same kind of motor came out of the 1993, after places the wiring harness then motor and the rebuilt transmission, it crank and drove until i notice that the r.p.m. dial was above normal and the shifting wasnt shifting. so after taking back to the transmission shop and they ran tests they stated that the throttle body cable was reading (90) when the truck is turned on and (35) when it was off and that something was shooting currents or fire to it . they claimed i had all the ground wires connected right, would i have to re-do the whole wiring harness or what can be done. thanks ahead

maybe should have left the wiring harnass on the 93 in place.I think the 92 came with a6.2
I would look at the alternator pulley size on the replacement engine,use the one that was on the 93 to get the right rpm reading.

I think the 92 came with a6.2


It is possible that his may have had a 6.2 or a 6.5, since the 6.5 was first offered in 92. It was not, however offered in the full line-up for 92.

As far as the problem, I'd say check all your wiring, very possible there could be something somewhere. I know, easy for me to say.

On a side note, welcome to The 'Place. How about filling out your sig and looking through the stickies.

Does the check engine light work? Pull the codes. A bad TPS will not keep it from shifting, it might shift really late, but it will shift with a bad TPS circuit. Does the speedometer work?

If you have a buddy with a scanner(snap-on, OTC, etc..,anything newer than 91 should work) that will help a bunch. On the 91-93 trucks and mechanical vans/hummers it usually engine speed sensor, input speed sensor, output speed sensor, no power to TCM, no power to trans or a bad shift solenoid causing a no shift condition.

Test that TPS cicuit, try this and see what you find,
http://www.dieselplace.com/forum/showthread.php?t=258330

Adjust TPS voltage to 0.5-0.6v @idle position, should read between 4v to 5v @WOT position.