Backfiring- Help
I have an 85 with a 12a no mods and everytime i turn it off it backfires... Im not talking about a little "poof" I am talking about sounds like I am standing at the back of my car with a 12 gage. It also shoots a 3 inch flame from the tail pipe when it does.
I have tried to adjust the carb and it still does..... Anyones help would be helpful. Thanks |
It may also help knowing i am not running a cat on my exaust.
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it could be as simple as an exhaust leak. i had a small hole in my exhaust and every time i let off the thottle above 3k it sounded like a shot gun and shot a flame. i patched the hole with JB weld and it fixed the problem
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It dont happend when i take it to high rpms just when i turn it off..
Whats th best way to find in exhaust leak? |
mine did this when i had weak spark plugs, and a small vacuum leak. some of the unburnt fuel would find its way to the exhaust and the temperature in there would ignite it. at the time i had headers straightpiped to a ebay muffler so it was VERY loud.
specially when you park on main street in front of the police department....never seen so many cops running outside with gun in hand. |
my 1st gen gsl does this everytime i turn i off aswell but not as loud
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Facing the fire wall on your carb. There is like this valve thing that kind of looks like a pv valve. If removed or stuck it will back fire like that.
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mine did it but it was my air pump (79 SA) but once i removed it no more backfires....which means no more fun at school zones and under bridges
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Rx7's do run a little rich... are you sure you are adjusting your carb correctly? The 85 has different adjustment screws than other models. If you've got a haynes manual check the adjustment for the 85 is in chapter 13 I believe.(It's one of the last chapters) It might sound like a dumb mistake but I've seen plenty of people on the forums who were adjusting the wrong screw thinking it was the same set up as older models.
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