Won't start when cold outside

5

Asked by Nov 06, 2016 at 11:29 AM about the 1997 Chevrolet C/K 1500 Cheyenne Extended Cab SB 4WD

Question type: Maintenance & Repair

I have a 1997 Chevy k1500 5.0 vortex. It will not start in cold weather.
It is showing p0420 and P 1345 codes. The man I got it from ran it in
the ditch. I have replaced the whole distributor, spark plugs, spark
plug wires, fuel filter, crankshift position sensor, map sensor, ignition
coil, innition control module, coolant temp sensor, and the pcm.
When I changed the pcm it ran very bad. So I changed it back to
mine. please help ???? I am out of solutions. Someone did say
something about the ignition switch. Can it be that?????

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