Backfire?? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 2 (permalink) Old 06-15-2009, 06:21 PM Thread Starter
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Exclamation Backfire??

2001 grizz 600..
ran fine stock, put a hmf muffler on it and uni filter, still ran fine
went to put the recommended jet on the carb (175) and started missing at 1/2 throttle and wouldnt idle right and when youd come to a stop it would backfiring some and blow the boot off from the head to the carb..

put the stock jet back in (145) and stopped missed at wot, but still not idle right, backfire, and blow off the boot....any suggestions on what might have gone wrong???

1st murdered out 2011 F250 CC SB Fx4 lariat
2008 F250 CC SB 4x4 lariat dark stone, s&b intake, 5" flo pro straight pipe, 7" flo pro tip, sct livewire custom tuned by Eric @ IDP
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post #2 of 2 (permalink) Old 06-25-2009, 04:00 AM
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Sounds like the jet was too big. You do need to richen it up from stock but not that much. I would try a 155-160

When you are changing jetting and stuff make sure you also put in a fresh spark plug
I had a plug show up after I jetted a race bike and it threw my off for a few hours until I figured it out.

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Last edited by RussK; 06-25-2009 at 04:04 AM.
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