You did an engine swap? I would take a good hard look at the crank sensor then..... they are one of the first casualties of an engine swap....

 

yea when i bought the truck it had the same symtoms and he gave me money to throw a new motor and its the same problems

 

May have a wiring problem. Check continuity from asd relay, to injectors, and coil.

 

info on how to?

 

proper read outs and such like i said before im no electrician

 

OK more info is needed please, you put in a new motor was it a rebuild or a used motor from another truck? if so what year? what old parts were reused on this new motor if any.

 

It was the same year motor 94 360 pretty much everything came on it cause I pulled it it was a used motor 37k in the ticker

 

Thanks, have you done a fuel pressure test yet? 39psi I belive is your number for that year.

 

WTF???? OK. how do I start.....a multimeter will not work to measure the spark. The amplitude is too high and the duration is too low for a multimeter to measure. In English, a multimeter (owned by a non-electrician, and even most electricians) will not measure high enough voltage range. The spark is a very short duration and is gone before the average multimeter can read it (unless you have a very fast "peak hold" function.

Search for "weak spark" thread for a number of ideas to check. Do not get "lit up" doing this. There are a number of opinions about "old school" and other methods, and I will not debate which is best. Just be careful and read the threads.

And +1 on checking crank sensor and fuel pressure.

 

I have 94 dodge with 318 did something similar. would start and run in park or nuetral fine. Put it in gear would go just off idle and anything more on the throttle would spit and sputter, barley pull itself. New plugs, wires, coil, cap, rotor, temp sensor, crank sensor, same thing. Bought a 40 dollar fuel pressure gauge and stuck on it, I had 25psi at turn of the key, would start it up would drop down below 20psi while idling. Would drop even farther when driving it, supposed to over 40psi all the time. replaced fuel pump and have not had a problem since. Find a fuel pressure gage and see where you are at.