Does your car tend to surge forward when you step on the gas? The information I am going give can be applied to any vehicle experiencing the same problem. A normal car should accelerate steadily from rest until you gain peak speed, If your engine has an irregular acceleration read on for some causes and solutions. You can always bring your car for Auto Repair San Francisco and have our expert technicians troubleshoot these issues for you.
The following are the causes and solutions of engine surge.
Failing fuel pump and regulator
Most fuel injected vehicles have an injector pump and regulator assembly that helps in fuel delivery to the engine. In order to inspect the pump and regulator, make sure the vehicle is on a flat ground, Attach a pressure gauge to the fuel test port, put the ignition key to the “ON” position. The gauge should jump up to 45 psi and 58 psi. With the engine running the pressure should drop to 5 psi and 52 psi. If this test fails you need to check your fuel delivery system.
Clogged Fuel Filter
A fuel filter ensures clean fuel is delivered to the engine; it is normally replaced within an engine tune-up. Some fuel filters are located inside the fuel tank and are designed to last the entire lifespan of the car. Replacing your filters could fix the problem.
Faulty Mass Air Flow Sensor
This sensor measures air intake volumes while sending signals to the engine in order to determine the engine loads and speed. The sensor may need to be cleaned or replaced.
Cracks in the vacuum line
Hood temperature can result in too hard and brittle vacuum lines; this causes cracks which leak some intake pressures. This could cause some surges. Replacing the broken vacuum lines is a quick fix.
Torn air intake hose
The air intake hose transfers engine intake air volume into the throttle actuator a torn one will develop engine surge. This is fixed by replacing the hose.
Faulty catalytic converter
It is normally used to eliminate air pollution by reducing emissions if it fails it might cause a blockage in the exhaust system. The solution involves replacing the catalytic converter.
Worn out clutch assembly
Wearing out of the clutches can cause a slip which causes a surge sensation. In an automatic transmission, this can be solved by replacing the old fluid while manual transmission involved replacing the entire assembly.
Most surges are caused by a fault in the fuel delivery system and drivetrain failures. In order to fix a surge, you need to inspect the car and determine the fault. If the engine light is on connect a trouble code reader to diagnose engine fault.
Or take your car to your mechanic and let them do the troubleshooting for you.