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Carburetor adjustment set too lean. The catalytic converter plays a vital role in removing harmful gases from the exhaust. Next, dip it into a bucket that's half-filled with water. You also want to ensure that the engines compression is correct, so you must do a compression test on all cylinders. You should also consider checking the ignition coils, which could cause the same issues. What causes engine backfire on acceleration? - Auto Blog Garage The next thing you want to check is the fuel pressure. surges/sputters while driving, but idles perfectly fine? Why Is My Car Sputtering When I Step On The Gas? Privacy Policy Terms & Conditions, Reason #1: Something Wrong in the Fuel System, Reason #2: Issues with the Spark Plugs and Wires, Reason #4:Leakage Around the Intake Manifold, Reason #8: Moisture on the Distributor Cap, Why Does My Car Makes Thump Sound When Accelerating, Best 0W 20 Synthetic Oils in 2022 (Reviews and Comparison). One of our expert techniciansis ready to detect and fix any fuel system issues your vehicle may be experiencing. Engine backfires and dies when throttle is pressed If you notice that it vibrates more than usual, it could be a sign that the engine is misfiring. Heres How to Unlock and Start Your Car, Car's Engine Burning Oil? What Are The Causes Of An Engine Misfire? You can either get one yourself, or go to a mechanic and borrow their diagnostic tool to read the trouble codes from the ECM. Vacuum Leaks: Vacuum leaks occur when there are cracks or holes in any part of your vehicles vacuum system which allows unmetered air into your intake manifold causing a lean fuel mixture and sputtering while accelerating as well as poor performance overall from your vehicles engine due to incorrect air-fuel ratios being delivered into it during operation. The mower is a 2006 Simplicity Javelin RZT2044 with about 125 hours on it. 2. Common Causes of Backfire: Lowering engine speed too fast. Though this might sound (and feel . I change the gas out with new gas and it still does this. Low fuel pressure is another thing that can cause misfires. Improved Safety: A well-maintained car is much safer than one with neglected components or systems which could fail unexpectedly while driving at high speeds or under heavy loads, leading to dangerous situations on the roadways for both drivers and pedestrians alike. Low Compression: Low compression occurs when there isnt enough pressure inside your engines cylinders during combustion which can lead to sputtering while accelerating as well as poor performance overall. I havent been riding in mud, just riding on roads. A clogged fuel or air filter can make your engine sputter and your acceleration lag because the engine is not getting enough fuel or air, respectively. Why Does My Car Sputters when Accelerating - Eagles Garage If it goes bad, the engine control module may overcorrect a problem that doesnt exist just as it does with a malfunctioning MAF sensor.