Mis-firing during accelearation/under load
I am driving my second Ranger since 1985. The current Ranger is a 96, 2wd, 4 cyl. with 339,000 miles. (Original engine, 3rd clutch. )
It recently started missing during acceleration and under load. The missing only occurs during the middle of the rpm range for each gear. (manual 5 speed)
I have replaced upstream O2 sensor, MAF sensor, EGR valve, and catalytic converter. Fuel filter was replaced 6 months ago but I am replacing it again this weekend.
There is a gas leak from the top of the fuel tank when I fill up. (Crack in fuel filler tube?) The engine is giving a code P1443 "EVAP Canister purge valve mechanical fault or VMV fault condition". Could a leak in the fuel system like this cause the misfiring during acceleration?