P0303 Cylinder 3 Misfire

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03-26-2023, 04:14 PM

#11

greg8453

Senior Member

Join Date: 03-29-2022

Location: Davison MI

Posts: 1,022

Quote:

Originally Posted by Jfidelh

I later figured out that P303 code was set due to very low gas. I was driving around trying to get the gas to low so that I could replace the fuel pump.

Absolutely not.

03-26-2023, 04:27 PM

#12

donbrew

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Join Date: 01-23-2009

Location: Fredericksburg,VA

Posts: 24,738

Not "absolutely".
Here is the logic: the pump is not getting full "gulps" of gas resulting in low fuel pressure. Low fuel pressure finds the most gummed up injector. For reasons I don't know #3 is the most common misfire, maybe because the knock sensor location.

BTW, a 13 year old thread.