Q: Misfire on cylinder one
Hello I have a check engine light on for a misfire on cylinder one I recently had the coil pack replaced for a misfire on cylinders 1 and 4 check engine light turned off for about a week then turned back on for a cylinder misfire on cylinder 1. I checked te spark plugs and wires they were fine did a spark test came out fine. Checked injector pulsation as well as ohmed the injector out. I looked for vacuum leaks came to fine none as well as made sure the engine was receiving sufficient air. I'm also recieving another code now that I've pulled up the codes again for a fuel pressure regulator sensor. Could that be the problem causing the misfire?
My car has 180000 miles.
My car has an automatic transmission.
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