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Backfire/ Miss Fire

PIOTREK

By PIOTREK,
in General Maintenance

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PIOTREK Proficient

PIOTREK

Posted
Posted

Hey guys done a search already, I doubt that it’s the coil pack but I’m open to suggestions!

Anyways haven’t given my car a decent boots for about 4 weeks. Sat night been perfect turbo weather :P I gave it a nice flog on the freeway entrance. I found that originally at 6k it wouldn’t really want to free rev (engine was warm 30min of driving). After one or 2 redlines it was fine. Now it doesn’t really backfire but at full boost at 7plus rpm it makes mid backfire on gear changes(release of the throttle). Not really worried as they are mild and doesn’t happen at 5k but any suggestion? Spark plugs changed 10k ago with quality iridium

Hopefully going track soon, and I want it running 100% perfect! Btw my car runs pretty rich stock, no smoke but I smell it sometime (rather it rich than lean)! I guess most people have simular issues?

Is there a way to reset the ecu I think its stuck in granny mode lol

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PsYLoR Collaborator

PsYLoR

Posted
Posted

Are you saying when you change gears at 7000rpm it backfires but no backfire at 5000rpm ? Sounds like its unburnt fuel popping????

Reset ECU by disconnecting battery & depress brake peddle, or do ECU diagnostic at the ECU, or bridge Consult.

Scroll down this post...... ECU Reset

PIOTREK Proficient

PIOTREK

Posted
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Posted

Yer only at 7k full slogging it! 5k runs prefect. And yer I would say it's more of a pop noise cause I no wat backbfire sounds like I used to run bov LOL (aftermarket).

If it's unburnt fuel then would u say not to worry? Cause really the only way to address this is air fuel ratio?

PsYLoR Collaborator

PsYLoR

Posted
Posted

Doesn't sound to me like a cause for concern, but im no qualified mechanic. I sometimes get a few pops from the exhaust when my foot is off the accelerator coming down revs after giving it some.

When you reset the ECU make sure the first drive you go on is hard & fast, the ECU learn's from this & adjust ignition timing accordingly. You want the ECU to know how to handle a flogging before learning everyday granny driving. :thumbsup:

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