WebJan 14, 2024 · The causes of exhaust backfire are as follows: The exhaust system is not in good working order, with leaks and clogs Incorrect tuning leading to excess air/fuel mixes … WebAug 18, 2011 · 1,757. Aug 15, 2011. #4. Re: 4.3 Mercruiser high rpm missfire - popping. It very well could be a lack of fuel issue. (lean) Do not run it like that or you will fry your engine. Have your fuel pressure checked first. Lean conditions kill engines quick. If everything checks out on the fuel side, then move on to the electrical side...
Engine backfiring through carb with stumbling on acceleration
WebMar 13, 2024 · A repetitive backfires are generated when the engine is simply running at idle or at cruising speed and can be inline with the engine RPM. A rhythmic popping sound which is not as prominent as … WebJan 7, 2008 · engine pops and backfires at high rpm 1) Vacuum leak 2) Broken valve spring (s) crazy deals lawrenceville ga
Engine sputtering at higher rpm
WebOct 15, 2024 · 10 Posts. #12 · Jan 18, 2024. TRBOS550 said: Hey guys! My s550 stutters and pops at high RPM, for example when I merge on the freeway and apply full throttle it just stutters and pops above 5K RPM. I put the car back to stock from my tune and the issue was still there and there has only been one check engine like for "Over Boost" but … WebApr 29, 2024 · Now getting a backfire through the carb (seems to always be the one over the 5/7 cylinders) on acceleration. SBC 283 with 4 Holley 94. All recently rebuilt. 1 turn out on all 4 seems to give the best response. Timing was set to 10 initial. Vacuum advance pulls another 15 or so, on the manifold. Mechanical is working and goes all in by 3000 rpm. WebFeb 16, 2013 · Exhaust Popping on Deceleration. When you decelerate, you reduce the amount of throttle. This causes an overrun, that is, the motor’s rpm is turning faster than the fuel provided can support, so the motor begins to spool down. This causes a couple of things to happen. First, when you close the throttle, you are also closing the throttle plates. dlan 1200+ wifi ac handbuch