What causes too much fuel in the exhaust?
Over time, or due to mechanical problems, the spark plugs in your vehicle wear out or foul. Fouled plugs have a foreign substance — ash, soot, tar, oil or fuel — coating the electrodes, causing excessive resistance and making the spark colder. This results in a rough idle and a fuel smell in the exhaust.
What causes a fuel injected engine to surge?
If an engine is not getting enough fuel (this is called “running lean”), due to fuel pressure (regulated by the fuel pump and regulator), restricted fuel injectors, a vacuum leak or really anything that throws off the fuel mixture going in to the engine, this can cause the surge.
What should I do if my engine is surging?
There may be a fault in the computerized engine control system. Check engine control systems with a scan tool. Have a mechanic test the circuits and repair or replace components as required, since this is generally not a DIY job. The fuel filter may be partially clogged. This is an easy fix! The fix: Replace the fuel filter.
What should I do if my exhaust is popping?
Remove the baffles and you increase airflow through the engine, and you have a lean condition. Once you re-jet, (assuming we’re right) and things are running right, do what he suggested and check your plugs AGAIN. You may need to change the plugs to another heat range.
What causes a car exhaust pipe to backfire?
Backfiring happens all the time, in cars and bikes, you just don’t hear it because the muffler/exhaust. Since you’ve modified it, now you do. What it is, is incomplete combustion, fuel is left over, and shot into the exhaust pipes. The heat from the pipes then ignites the vapor and boom, backfire.
How does the exhaust gas recirculation valve work?
The Exhaust Gas Recirculation (EGR) valve is an important part of your car’s emissions system. It recirculates exhaust from the engine’s combustion chamber to burn again rather than sending them to the emission system, thereby reducing emissions.