The engine still stumbles and backfires through the carb. However, be very careful when doing this and have a fire extinguisher ready. Muffler construction can induce backfire. However, it is doubtful that you have one at home, so you can also try to find leaks by listening to high-pitched noises around the engine bay when the engine runs on idle. While sputtering engines can provide good acceleration performance, they can also have an adverse effect on acceleration performance if not properly maintained. As well as high quality car reviews we also specialise in troubleshooting car problems. Learn more here: How to find a Vacuum Leak & How to Fix It (8 Easy Steps). When the coil got hot it would spit and sputter and backfire. This type of engine is often used in vehicles such as cars, trucks, and motorcycles. Change Store. It can also be caused by spark issues from bad spark plugs or ignition coils. READ MORE: 15 Types of Car Sensors (& What They Do). It is consistent with the RPM's. At idle and say when downshifting there is no sputtering, and the car doesn't bog down and I don't feel as if it is being sluggish, only when I . You can do this with either a compression tester or a leak-down tester. Backfiring during acceleration can also be caused by internal carburetor problems, low compression, leaks in the fuel tank, lean engine conditions, and weak or broken valve springs. A cracked manifold creates a leak that will cause a vehicle to sputter or run jerky when you accelerate. Follow along as we break down some possible explanations for engine sputtering and share with you why its so important to fix the problem ASAP. Certified Automotive Diagnostic Technician. Mower runs fine for an hour then sputters and dies. The ratio of fuel to air in the mixture must be precise in order for it to work properly. First, check the pressure and take out the transfer pump screen. This component should be checked regularly to make sure that it is clean. A dirty mass airflow sensor could also be to blame for a sputtering engine. Continue with Recommended Cookies.
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