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Aug 27, 2008 3:09:12 PM

smu78: Newbie; Loc: Texas, USA; Posts: 5, Gallery; Registered on: Jun 30, 2007

997 Backfire

I have a `07 997 C2 and occasionally my car backfires when accelerating from a dead stop. Does anyone else's car exhibit this and if so is this normal? I am debating taking into the dealer.

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Aug 27, 2008 3:15:01 PM

JoeRockhead: Rennteam VIP; Loc: Topside , Monaco; Posts: 8033, Gallery; Registered on: Sep 17, 2007; Reply to: smu78

Re: 997 Backfire

Don't walk, RUN, to the nearest phone and make a service call. Kidding. Do you notice any performance degradation when this happens? Are you running stock exhaust? Could be a bad injector.

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Aug 27, 2008 4:20:10 PM

smu78: Newbie; Loc: Texas, USA; Posts: 5, Gallery; Registered on: Jun 30, 2007; Reply to: JoeRockhead

Re: 997 Backfire

No performance degradation and I am running a stock exhaust.

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Aug 27, 2008 4:35:58 PM

yellow997s: Junior; Loc: sugarland texas , United States; Posts: 83, Gallery; Registered on: Aug 29, 2006; Reply to: smu78

Re: 997 Backfire

what brand/grade of GAS are you using ?

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Aug 27, 2008 4:53:38 PM

MMD: Rennteam VIP; Loc: usa; Posts: 9652, Gallery; Registered on: Dec 16, 2004; Reply to: yellow997s

Re: 997 Backfire

Sounds like an important clue that something's wrong. Get car to service dept and have it checked out when you get a chance. FWIW, I've been around a while and haven't heard of road cars backfiring like you describe.

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Aug 27, 2008 8:08:08 PM

smu78: Newbie; Loc: Texas, USA; Posts: 5, Gallery; Registered on: Jun 30, 2007; Reply to: yellow997s

Re: 997 Backfire

Am using Valero premium 93 octane, but in the over a year that I've owned the car have tried using Exxon, Shell, and other premium brands. Problem is I've mentioned to dealer in the past when car is in for other minor issues and the response is always the same: unable to duplicate backfire; I'm, not surprised - I can't even duplicate it.

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Aug 27, 2008 8:23:28 PM

MMD: Rennteam VIP; Loc: usa; Posts: 9652, Gallery; Registered on: Dec 16, 2004; Reply to: smu78

Re: 997 Backfire

The other thing? A part in the air intake system (or elsewhere) might have a burr or other small imperfection on it which causes it to stick or falter. Might just resolve by itself. Happened to me with my brand new 997S. Car didn't backfire but instead shook nastily after starting. It did it a few times, freaked me out, then it just went away and never happened again. Service tech never saw any codes related to those events.

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Aug 27, 2008 9:18:38 PM

yellow997s: Junior; Loc: sugarland texas , United States; Posts: 83, Gallery; Registered on: Aug 29, 2006; Reply to: smu78

Re: 997 Backfire

are you using oem air filter? K&N or BMC filter could cause the issue..

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Aug 28, 2008 8:28:25 AM

BlackOctober: Senior; Loc: IL , Israel; Posts: 511, Gallery; Registered on: Sep 10, 2004; Reply to: smu78

Re: 997 Backfire

Quote:
smu78 said:
I have a `07 997 C2 and occasionally my car backfires when accelerating from a dead stop. Does anyone else's car exhibit this and if so is this normal? I am debating taking into the dealer.

I know this problem,this a engine timing problem nothing serious.Take Your car to the service,they will update Your computer's program.After that the updated system will setup the timing as it should be.That all.Enjoy Your drive.

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