Questions & Answers for: causes surge high rpms

surge. I use this to cure these problems all the time. Here is the most common cause of surges and stalls and low idle, it is the idle speed control air-bypass valve (IAC) and throttle valve, they get

...rpms it dies. TRY THIS AND LET ME KNOW IF IT CORRECTS YOUR PROBLEM Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is the idle speed control ...

...causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or ...

the rpms close to or more than 1 on the tach. Does anyone know what could cause this? Check for a vac leak. Check all small vac lines and listen for high pitch whistling noise. Ir crack in intake hose

...high for a moment then drops. I have to give it gas to keep it from dying but initially when I hit the gas it doesn't respond so I have to pump it a little first. While the engine is cold the ...

high at idle. 400 to 800 RPM? surge. 1000 to 2000. what? numbers tell the tale. first off, idle is the last thing to work right on any engine. there are many ways to find what is wrong. fix idle surge

...absolute pressure ( MAP) sensor/ barometric pressure (BARO) sensor---high input====causes--wiring short to positive---MAP sensor---BARO sensor---ECM Check the MAP sensor first and replace if ...

...make metallic deposits on spark plugs which will then miss at high speed first and soon at all speeds. Try pulling plugs and "reading" them first. Then test fuel pressure while running at high

High & Low and doesn't stop after starting. Continues to do it at each stopping point? you have air in your coolant. This is a common problem that causes surging idle on the Legends. You need to bleed

...surge protection for all electronic equipment as the voltage from a genset is reasonably well controlled , even at over rpms the voltage would not go high enough to cause damage for example a 240 ...