have a 98 dodge dakota with codes p0351,p0320 and p0420 runs good until it warms up any suggestions have replaced all these parts and still the same

 

Welcome to the forum Tom. I moved your post into a new thread.

P0351 - ignition coil #1 primary circuit
P0320 - no crank reference signal at PCM
P0420 - 1/1 catalyst efficiency

What parts did you replace and with what?

What engine/transmission do you have?