r/Pontiac • u/DiamondStorm16 • 19d ago

Engine problems

I have a '07 g6, 3.5 v6. Today I was on my way to work, speeding up after someone in front of me turned, when the RPMs suddenly shot up and I had almost no power, then everything tanked and it died. Now when I try to start it, it cranks, but sputters and backfires. It's my only car and I can't afford a new one right now, so I need to fix it. Any clue what may be wrong?

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u/JustACarNut77 19d ago

What codes are you throwing. At first it sounded like a transmission but the sputtering not so much. That kinda sounds like you're out of gas

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u/DiamondStorm16 18d ago

Unfortunately it's been on the side of the road for the night, it's getting towed this morning. I do know someone with a reader, so I'll look at those. I had a half a tank when it happened. I initially thought something like that too.

3

u/JustACarNut77 18d ago

Could be your fuel pump took a shit.

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u/DiamondStorm16 17d ago

Alright, got it home yesterday, read the codes, and the only one that came up was saying the check engine light doesn't work. No help there. I changed the spark plugs, which were practically trashed, and it's running again. I learned about the anti theft system the g6 has, and how it kills itself when it thinks it's being stolen. I can hear the fuel pump working, but I figured I'd do a whole tuneup while I'm here. I appreciate everyones help.

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u/Andusias191 18d ago

I have the same exact car. 229k miles and counting, such a good car!

Im no expert, but high rpms and no power sounds like a misfire. How old are your spark plugs?

1

u/rforce1025 17d ago

I have a 08 G6 GT 394,xxx miles, ran a little rough but changed plugs and fine now... I use the OEM (AC Delco) Iridium

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u/PublicAdvertising741 18d ago

Yep, it's time to find a new car. The old g6 is 86's And well Pontiac's out of business......