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To much back fire? |
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Cerwin Vega Fan
Joined: Jul 22 2003 Posts: 3001  2003 Pontiac Aztek Last updated: 06/22/07 |
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Tue Dec 09, 2003 2:27 pm
When I give my car any decent amount of throttle and the RPMs reach over 3500 their is a back fire I can hear through the exhaust when I let off the throttle. I now LT1's do backfire sometimes but is this really normal for my car to be backfiring this much?
Thanks, Chris |
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Goph
Joined: Feb 14 2003 Posts: 3824 Location: Iowa 1995 Pontiac Grand Prix Last updated: 09/04/04 2000 Pontiac Grand Prix Last updated: 05/11/06 |
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Tue Dec 09, 2003 3:19 pm
get a tune up if you haven't had one is some time.
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cheezer
Joined: Jun 17 2003 Posts: 45 Location: Sterling, Illinois - Orlando, Florida 1994 Pontiac Trans Am Last updated: 04/04/04 1965 Ford Mustang Last updated: 04/04/04 1967 Mercury Cougar Last updated: 04/04/04 1968 Ford Mustang Last updated: 04/04/04 |
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Wed Dec 10, 2003 9:21 pm
It could be a number of different things. Plugs, Plug wires, Opti-spark going bad. is your car a A4 or M6?
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Cerwin Vega Fan
Joined: Jul 22 2003 Posts: 3001 2003 Pontiac Aztek Last updated: 06/22/07 |
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Wed Dec 10, 2003 11:31 pm
A4 |
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Mav
Joined: Nov 26 2003 Posts: 2680 Location: So Cal 2003 Mitsubishi Eclipse Last updated: 03/01/08 |
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Thu Dec 11, 2003 2:33 am
I had the same problem with my LT1.. had 145k miles or so on the Optispark though and I'm pretty sure was original plugs and cables... Replaced the plugs with splitfire 2's and replaced the optispark and cables.. was like night and day... It's a ***** to change the optispark though, so be forwarned.. you gotta pull off the main pulley, and the water pump to get to it... and then to change out parts of it, you gonna need a reverse E6 torx and a T4 torx driver (I think that's what I needed.. or it might have been reverse E4 and a T6 torx.. either way, they were sized that none of the auto stores around here stocked =/
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cheezer
Joined: Jun 17 2003 Posts: 45 Location: Sterling, Illinois - Orlando, Florida 1994 Pontiac Trans Am Last updated: 04/04/04 1965 Ford Mustang Last updated: 04/04/04 1967 Mercury Cougar Last updated: 04/04/04 1968 Ford Mustang Last updated: 04/04/04 |
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Thu Dec 11, 2003 9:13 am
From the backfiring it sound like your miss firing or you have some crazy detonation. If your plugs and wires are good then I would check the optispark. You can get them off ebay for under $200. Here is a install page for it.
http://www.charm.net/~mchaney/optisprk/optisprk.htm Optisparks can cause all sorta of funky problems and they were one of the major flaws in 93-97 f-bodies. I am upgrading mine to a vented one over christmas when I do my rebuilt build. Rather do it while its apart than wait and have to do it later down the road. |
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Mav
Joined: Nov 26 2003 Posts: 2680 Location: So Cal 2003 Mitsubishi Eclipse Last updated: 03/01/08 |
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Thu Dec 11, 2003 1:52 pm
I got mine for I think $120 from Autozone...
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DragonJeep
Joined: Jul 20 2003 Posts: 3730 Location: Tampa, FL 1992 Jeep Cherokee Last updated: 03/31/05 |
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Thu Dec 11, 2003 3:27 pm
This has got to be Mavs shortest post ever.
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Mav
Joined: Nov 26 2003 Posts: 2680 Location: So Cal 2003 Mitsubishi Eclipse Last updated: 03/01/08 |
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Thu Dec 11, 2003 7:32 pm
I can go shorter.. *grin*
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CRAZZY_AL
Guest Gallery: Showoff your car! |
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Sat Dec 13, 2003 6:20 pm
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The time now is Mon Mar 22, 2010 5:20 am