![]() A can of carb cleaner while it's running (or even water) will help you narrow it down. That gasoline-gargling backfire exhaust sound some cars make decelerating, which can really only be described as snap crackle popping, has become pretty popular since motorheads almost. Give it a once over and see if you can find that intake leak. Because brake sensor is insert in that bracket that you have to pull back. Brake verb To cause to move or proceed at a less rapid pace. And I never have that problem happing to me again. Brake and Decelerate Similar meaning words. ![]() So all I did is loosen that nut and pull back the bracket is much is it will go and tight the nut same time. I figure eventually I'll pull all the CARB emissions stuff off, and that will probably eliminate some little vacuum leak I have.īut yours sounds worse than mine, and with a new engine to boot. And bracket can be adjusted by loosing 10mm nut and bolt. This allows the engine to draw its intake across the jet and pull fuel, and when I get slow enough, I close the throttle and it idles fine. I can help it not to lean misfire if I just don't close the throttle all the way during deceleration. You will be able to notice which of the axles work and which don’t. It seemed to want to sputter and hesitate when I want to go from a stop but works okay at around cruise RPMs. The itnitial timing is at 8 degrees with the defualt mechanical advance. I have the Pro-Billet ready to run in a 305 with a blaster coil and MSD 8.5mm wires. You can test this by removing the cap and trying to floor the pedals. I got my Digital 6+ in and it seems to have made more problems than it solved. Check if the brake hub and axle spline are properly connected and are working fine. I'm personally not really worried about it. Another reason for the problem could be related to the axle-to-brake connection. ![]() My main problem was a leaky o-ring between the intake and the plastic spacer to the engine, but even after replacing that (which solved an issue where the bike would die at idle a lot and not want to restart), it's still doing the lean misfire thing. Backfires on deceleration is simply the process of burning the excess fuel present in the combustion chamber. That somewhere else isn't across the jet, doesn't draw fuel, and so you're lean, but just on decel. Yes, it's from a too lean condition when you close the throttle and the engine wants to suck more air in than the throttle slide is allowing - and it's able to suck that air from somewhere else. Could be my linkage is a hair too tight, and the slight weight of my foot on the pedal bleeds a bit of gas into the engine. I get a bit of a backfire sometimes, but it is generally when I am lazy and leave my foot resting on the gas pedal a little to hard when de-accelerating (without braking). ![]() I get that on mine, too, it's not technically a backfire, but a lean misfire. Re: 1968 280 SL backfires on deceleration. ![]()
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