Backfiring when I shift

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Jul 13, 2005 | 10:42 PM

calys968

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From: Tucson, AZ

Backfiring when I shift

My car is backfiring almost every time I shift and it's also getting really crappy gas mileage. Besides that it's running fine, no stalling, sputtering, etc.
Does that sound like a bad O2 sensor?

Jul 13, 2005 | 10:43 PM

Gloveperson

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That or a fouled plug.

Jul 13, 2005 | 10:45 PM

calys968

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From: Tucson, AZ

Quote:

Originally Posted by Gloveperson

That or a fouled plug.

Sorry if this is a really retarded question but what would a fouled plug look like? Would it be black?

Jul 14, 2005 | 02:16 AM

Gloveperson

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Quote:

Originally Posted by calys968

Sorry if this is a really retarded question but what would a fouled plug look like? Would it be black?

http://www.dansmc.com/Spark_Plugs/Sp...s_catalog.html

Jul 14, 2005 | 02:29 AM

DONAIMIAN

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Ive seen it happen on stock cars with OR pipes, but they didnt have bad gas mileage.

Jul 14, 2005 | 07:40 AM

01TAFlyer

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My car did this one time, it was two misfiring plugs, now the misfires weren't bad enough to throw an ses code, and it seemed to drive fine (kinda sluggish though), but it backfired during every shift at anything past like 25% throttle. So I say to change your plugs, I think that if it was a bad o2, that your drivability would be different.

Jul 14, 2005 | 07:48 AM

SlpLS1

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if it was a bad o2.. u car would be sluggish and it would kinda jerk back and forth. no power.. and it would throw a code.. after about 10-15 miles

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Jul 19, 2005 | 02:11 AM

calys968

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From: Tucson, AZ

Ok, I've noticed that my car is only backfiring when I'm low on gas. And I'm not talking about when it's running on fumes, it does this whenever I get down to the last couple gallons. Should I still check my plugs?

Jul 19, 2005 | 08:08 AM

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Ru2n00n3er

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From: Belleville, MI

Might be bad fuel in your tank, and it's just sitting at the bottom of the tank each time you fill up? Maybe try using it all up before you refill the tank next time.