Help??????

[240coupe]

i have a 1994 ranger 4.0 auto i just put a new used motor in it runs but not much power i have good fuel pressure (35 constant) and spark but if i pull plug wire 1-3 no difference in run ability if i pull 4-6 it dies i tryed pulling codes and i have none any help would be greatly appreciated

 

[AlaskanRider]

What all have you done yet? Have you pulled the plugs and looked at them? Compression test?

Sounds like 4.0 ignition systems are pretty good and either work fine if their good, and if their bad the engine wont start at all.

Start with the simple easy stuff and go from there. Got spark? Got fuel? Got compression?