Getting a P0316 and no other misfire codes; not even random misfire detected. However, I do feel an intermittent misfire on startup, so I don’t understand why there isn’t a specific cylinder throwing a code.
I’ve replaced the fuel pump, injectors, ignition coil, wires, and spark plugs on the truck. I’ve replaced the spark plugs with Bosch double platinum plugs, which I’ve heard anecdotally the Ranger does not like.
I measured the compression and it reads 205, 205, 210 and 210 (1, 2, 3, 4) on a completely cold engine.
Any suggestions on chasing this evil gremlin? Should I suspect a bad injector(s)? Is there a more specific diagnostic for the ignition system than checking the plugs for spark?
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Friday, January 1st, 2021 AT 4:19 PM