Backfires when I nail the gas - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
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post #1 of 7 (permalink) Old May 26th, 02, 03:00 PM
SSuperman
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Hey guys,
If Im at a standstill and I nail my gas pedal I get a backfire out of my Holley 600.
If I'm at a 10mph roll and nail it
I get no backfire....I installed a K&N X-tream air filter and I think thats when I started to notice it. Does the carb need readjustment, or could it be timing??
Thanks
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post #2 of 7 (permalink) Old May 26th, 02, 03:14 PM
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sounds like you leaned it a little back out your fuel mixture screws a 1/8 turn each an try it until it improves. but keep track of how far from the original setting you backed them out. this should do it if this prob occured only after installing the new filter.
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post #3 of 7 (permalink) Old May 26th, 02, 03:16 PM
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p.s. is that carb equipped with back fire protection for the power valve. if not you now have a new problem.
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post #4 of 7 (permalink) Old May 26th, 02, 04:56 PM
SSuperman
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Hey storman,
I'll try backing it out a tad and see if it works..
If the power valve blew out, would the car would run like crap at idle?
Right now the car idles great.
post #5 of 7 (permalink) Old May 26th, 02, 07:38 PM
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You also might want to make sure you have no play in your accelerator pump arm. You should have fuel coming out of the shooter nozzle as soon as there's any movement on the throttle. You also may have to change the pump cam or shooter nozzle to get rid of the stumble.

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post #6 of 7 (permalink) Old May 27th, 02, 01:55 AM
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Dave
 
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SSuperman,

I went through this on my carb and got a lot of help from this site. Rather than post the suggestions, here's a link to the original thread.
https://www.camaros.net/forum/Forum5/HTML/000877.html

Good luck.

Dave
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post #7 of 7 (permalink) Old May 27th, 02, 03:50 AM
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if its idling the same as before you changed the filter the valve should be ok.. if everything was great before the filter all you should have to do is adjust your fuel mixture if it is still hapening then check your timing. its a good idea to keep a record of all your settings ex. timing turns out on fuel mixture etc. that carb site will help if all else fails but proceed carefuly an keep a record.
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