We'll fix your Subaru (old or new) and get it running smoothly and efficiently once again. We're glad to have modern technology making things simpler and more reliable under the hood - but if your car is backfiring, turn to the pros at the Hanson Subaru service center. If the carburetor needed service or wasn't working correctly, it might not spray the right amount of fuel - leading to an incorrect air-fuel ratio and, you guessed it, an engine backfire. This could cause a significant backfire.Īdditionally, classic cars featured carburetors rather than direct fuel injection. On an older car with spark plug wires, wires that get crossed or installed in the wrong order can inadvertently cause a spark to fire in a cylinder when it's not supposed to. They're equipped instead witn coil-on-plug designs that increase the consistency and control with which the engine fires its sparks. That's because the systems on older engines aren't computer controlled, and thus will need constant adjustments often called a tune-up.įor example, modern cars no longer have spark plug wires. If you've got a classic ride, that older engine technology under the hood is more prone to backfiring. Why do Engines Backfire? Reason #4: Older Engine Problems Yet again, leftover fuel vapor will flow into the exhaust and could combust there in a backfire.Ĭommon causes of a lean fuel mixture include a vacuum leak allowing the engine to suck too much air clogged fuel injectors not adding the correct amount of gasoline to the cylinders or a bad fuel pump that's no longer pumping enough fuel from the tank to the engine. If there's too much air in the cylinders at the time of the spark, and not enough fuel, the spark won't be able to ignite all the fuel at once. The opposite problem can lead to the same result. Check the price history, create a price alert, buy games cheaper with GG. Why do Engines Backfire? Reason #3: Lean Fuel Mixture Compare prices of over 40 stores to find best deals for Catch a Lover in digital distribution. This kind of backfire is more common on older, carbureted engines with distributor caps. That means most engines will burn up 100% of the fuel in each combustion chamber each and every time. Modern engine timings are controlled by computer, and can even vary on the fly. This combusts the unspent fuel in the exhaust, rather than in the engine - resulting in a loud bang and sometimes even visible flames coming from the exhaust tip. As that ultra-hot fuel reaches the tailpipe, it mingles with the highly-flammable oxygen present in the outside air. If the timing of the spark is a bit too late in the engine cycle, unburnt fuel and air may be allowed to flow through the exhaust. A spark ignites the entire mixture, and the resulting explosions are what power your car. Inside each cylinder, fuel and air are mixed in a precise ratio at the exact right time.
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