Ok guy here's my current situation, I took the engine/tranny out of my truck and had it replaced with another setup I had in my parts truck. I changed the plugs/wires, oil/filter. Tried to start engine, but it's just spinning over. Checked the fuel pump to see if its pumping fuel to engine(it is), but still won't start up. Any suggestions?

 

Did you check for spark? A lot of times during engine swaps the crank position sensor gets messed up. If you have no spark that is the first place to look.

 

I'll check that and get back with you

 

Did you check the ignition coil yet?

 

I have 0 spark, going to get a ignition coil and crank position sensor

 

Verify you are getting power to the coil. If you have that, verify whether or not the PCM is actually controlling the coil ground circuit, that should tell you which one you actually need.

 

Replaced the crank sensor, still no spark. I think it's the ignition coil

 

when i changed my trucks spark plug, it turns out one or two of the wires are not connected properly. when i tried to start i hear nothing, no crank too. so maybe thats it. Pull and put back every spark plug wire.

 

All of the plus wires are connected properly, and all sensors are too. Still nothing.

 

I swapped the ecu from one truck to the next. My trucks ecu has a sticker on it that says 150ad and the other says 440ad. It still wont start and still won't fire. What else could it be?