An engine that is hard to start, hesitates to speed up, and sometimes dies after idling could indicate a fuel delivery issue, such as a clogged fuel filter or failing fuel pump. It may also be related to problems with the ignition system, like worn spark plugs or faulty ignition coils. Additionally, issues with the air intake system, such as a dirty air filter or malfunctioning mass airflow sensor, can affect engine performance. Regular maintenance and diagnostics are essential to identify and resolve these issues.
Engine bounce is a phenomenon where the engine speed rises rapidly and then drops back down while the vehicle is idling. This can be caused by issues with the fuel system, ignition system, or engine timing. It can lead to rough idling and poor engine performance.
Idling is what your car is doing when it is just sitting somewhere running. As soon as you press on the gas it is no longer idling. Your idle speed is the number of RPMs your engine runs at when you are idling.
My engine is idling too high. How do I adjust the idle speed?
Check your vacuum lines this usually the cause for a surge in engine speed when idling or running.
A 1996 Toyota Tercel will hesitate on acceleration at cruising speed if the fuel filter or injectors are clogged. This prevents the engine from receiving enough full and will hesitate.
Because - if an engine (powered by fossil fuels) is running - even at idling speed, it's still producing waste gasses - which polute the atmosphere !
The idling speed is automatically sensed ....and set by the Air control valve
Check your idling speed it might be too low to support the AC motor, so when you turn on the AC the engine dies, try increasing the idling speed a bit at a time.
The air conditioning (A/C) compressor can impact the idling of a car engine by adding extra load to the engine when it is engaged. This additional load can cause the engine to idle lower than normal, potentially leading to rough idling or stalling if the engine struggles to maintain the required RPMs. Conversely, when the A/C is turned off, the engine can idle more smoothly and efficiently, as it no longer has to compensate for the compressor's demand. Proper engine management systems typically adjust idle speed to accommodate the compressor's load, helping to maintain stable idling.
There is a speed sensor under the left side of the engine, close to the oil filter. When this goes bad, the transmission hesitates to shift upwards because of incorrect speed signal.
The idle speed sensor tells the onboard computer how fast your engine is idling. The location of the idle speed sensor on the VW Jetta is on the actual throttle body.
Sonds like the idling speed is too low - it can be adjusted (Usually with just a screw driver) if you know the right screw to turn to give the engine higher idling revs.