Web Results


The causes of most engine backfires fall into two categories: gases explosively expelled through the intake manifold, or explosions that take place within the exhaust system. Backfires through the intake are generally related to problems with ignition timing, and backfires through the exhaust are usually related to ...


How to Fix Engine Backfires . ... The problem list below will give you an idea of what causes could be generating this condition. ... If this timing is mis-adjusted it can cause low power, poor gas mileage, engine detonation (pinging) and backfiring through the intake or exhaust system.


The rapid burn that occurs while the exhaust valve is open causes a backfire. Almost all backfire situations will have other symptoms attached to them such as a Check Engine Light illuminated. A backfire is a sign that your car isn’t running efficiently and needs to be addressed in short order.


A back-fire is a separate phenomenon from the fire produced by Top Fuel dragsters. If a backfire occurs in the exhaust, some authorities refer to it as after-fire, though this term is infrequently used and use of the term "after-fire "can lead to confusion. A common cause of backfire in the exhaust is from running an incorrect fuel mix, or ...


When an exhaust pipe is changed, this causes an unbalanced air-to-fuel ratio. The airflow into the motorcycle is increased because of the difference in pipe design and other specifics. This difference causes backfire in the exhaust. Other causes of backfire are bad or weak fuel pumps, low fuel pressure, or clogged fuel filters.


Why does my engine spit or backfire? First off, you need to determine whether it is backfiring out the exhaust or back up through the carb. We usually refer to an exhaust backfire as a "backfire", and backfiring through the carb as "spitting" or "coughing".


A mower th at backfires is irritating, but thankfully backfiring is not a danger to your engine and lawn mower. While it’s not dangerous, it can be a symptom of other problems, and should be addressed. So what is a backfire, what causes it, and how can you stop your lawn mower engine from backfiring?


What causes a car to backfire? In a nutshell, your car backfires when its internal combustion engine experiences an instant of external combustion. ... » 5 Reasons Why Your Car Backfires. Number 5 Will Get You Worried; ... A backfire from your exhaust pipe will not hurt your car, but it can be an indicator of an impending problem or a ...


I’m trying to trouble shoot a backfire through my exhaust. I adjusted the valves, reset total timing, tried another carb, replaced fuel nozzle the carb is a Holley 600 the motor is a 350 40+ comp 286hr 10 to 1. It only happens under a load at idle and above 5500 rpm. The only thing I have not tried is fuel pressure. Intake vacuum is 15.


Backfire is a condition described as a loud bang, poof, explosion, etc., while the engine is running or while shutting down. Afterfire occurs after the engine has been shut off. Note: Backfire and afterfire through the carburetor will not harm the engine at all! Find out the most common causes and possible fixes for engine backfire and afterfire.