P0308 and P0304 mystery misfire

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7/22/24 | 06:24 PM

#21

MustangOldYellow

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Joined: May 25, 2024

Posts: 45

Likes: 15

From: Australia

Quote:

Originally Posted by s197HR

just a quick update, put the new fuel filter in, reset KAM, and took vehicle for a drive while monitoring misfires on my scan tool. (generic snap on scan tool.) misfire monitor seems to be completed and vehicle is running better, i still feel a stutter, so i don’t think that was the only problem, however, i do think it was contributing to it. i’m gonna drive the vehicle a bit more and see if it acts up again. if not im going to go to pulling the intake which i have to do anyways to fix a coolant leak at the cross over.

Good one

May pay to add a fuel system cleaner into the tank? Liqui Moly do a brilliant one.

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9/22/24 | 01:59 PM

#22

s197HR

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Joined: July 19, 2024

Posts: 22

Likes: 5

update

Quote:

Originally Posted by MustangOldYellow

Good one

May pay to add a fuel system cleaner into the tank? Liqui Moly do a brilliant one.

Hey yall just an update, after i did a intake swap off my buddies 07 and fixed the coolant leak the misfires mostly stopped and i drove the vehicle for about 3 weeks until i started getting a top end knock and misfires again. i pulled valve covers and inspected and i suspect either a lifter went out and what i was experiencing were symptoms before complete failure. just thought id update, i think it may possibly be a phaser as well though it’s hard to pinpoint where the knocking is coming from. hope this helps anyone who encounters the same issues !

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