When motor is cold it will crank and run, hit the gas and has a little hesitation. When the motor gets running warm it won't idle right in gear and cuts off quite a bit and doesn't want to restart. It seems to idle ok in park or neutral for the most part. I replaced the motor a few months ago, piped in 2 of the 4 catalytic converters, replaced knock sensor and now the engine light is back on and it shows codes for the catalytic converter, mass airflow sensor and random missfire, the mass airflow seems to be ok. I tried to check fuel pressure but I can't get the truck to crank with the fuel pressure gauge hooked up, I unhook it and it cranked right up but the engine was cold like I said earlier once the motor gets running warm it doesn't want to run I have no idea what to do now and I need some help. Any ideas?
Thursday, April 18th, 2019 AT 1:38 PM
(Merged)