What causes VTEC not to work?

What causes VTEC not to work?

A lack of oil pressure, enough oil or similarly related lubrication issues can cause problems with your VTEC system. Without a proper pressure reference, your big VTEC cam lobe will never get going. Without the right level of oil pressure, VTEC doesnt work.

How do you know if your VTEC is not working?

SO MAKE SURE YOUR CAR IS WARMED UP AND YOU HAVE A SUFFICENT OIL LEVEL. When the wires touch you should definately feel a differance, well, that is if your vtec is working.

Can a bad ground cause low idle?

just to add, idle issues can be caused by poor grounds. if throws an offset to the voltage seen by the ECU, which either adds or pulls fuel. This either runs the engine lean or rich and the idle gets screwed up. It can result in slow cranking, unstable or low/high/surging idle, and a slew of other things.

What causes RPM to drop at idle?

This is a common sign of a dirty or failing idle air control valve. This is all controlled by the idle air control valve. When the engine RPM drops below the normal range of 750-800 RPM (for most cars), this often times will cause the engine to stall indicating a dirty or faulty idle air control valve.

Why is my rpm acting up?

If your RPM fluctuates while accelerating, it could be because your spark plugs have gone bad on you. Worn-out spark plugs can cause misfires to occur within your engine, and those misfires can lead to your engine vibrating a whole lot. Those vibrations can lead to the RPM in your engine going haywire on you.

Why does my car sputter at low RPMs?

Most likely if it has a carburetor the carburetor needs an adjustment, or spark plugs are old and worn out, air filter is possibly worn out and clogged with debris so its restricting the airflow. Oxygen sensor is a possibility. Or it could be a fuel filter/injector clogged/ fuel pump blocking proper fuel flow.

Why does my car stutter at 1500 rpm?

In general, when a vehicle sputters and is hard to accelerate, it is due to either a fuel or ignition system component failure. It’s also possible for dirty air and fuel filters, fuel injectors or the throttle body needing to be cleaned that can cause this problem.