Missfire

Technical Discussions - Got a mechanical problem?

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Noturbuddypal
Scoobytruck Lurker
Posts: 2
Joined: Tue Jan 21, 2025 5:36 pm

Missfire

Post by Noturbuddypal »

so I have a misfire. started slow and only at stoplights then got worse, finally got a misfire code on cylinder 3. Did a compression test all came back fine. swapped and then put in new fuel injectors. New fuel pressure regulator ,new ignition coil and new sparkplugs. I'm at a loss of what it could be or what to check next. currently the misfire still happens only at idle after warmed up and an irregular intervals . I am sputtering some liquid out of the tailpipe when it misfires, I cant get a good smell on it but I believe its the unburnt gas coming out. any help would be appreciated
20Baja06
Scoobytruck Contributer
Posts: 92
Joined: Tue Jul 20, 2021 8:18 am

Re: Missfire

Post by 20Baja06 »

What vehicle trim is this?

How are your spark plugs and wires? Are the plugs gapped correctly?
-Brian
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anarchy1024
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Joined: Mon Apr 12, 2010 4:07 pm
Location: Toronto, ON

Re: Missfire

Post by anarchy1024 »

You said new coil and plugs; did you also replace the spark plug wires? If not...
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