Questions & Answers for: engine surges idle

...engine surges until power is applied recently purchased 95 astro , engine idles rough , after apllying power will accelerate smooth then at speed engine began surging , when slowing down engine ...

...a 2008 Toyota Sienna. When idleing the engine seems to surge, not a drastic surge but noticeable. The tach doesn't surge along with the engine..i'm wondering what this could be.. iac idle air ...

...the main engine computer was replaced 7 months ago but at crank idle drops then surges over 1000rpm then drops to normal. Is also surging up at times while driving. Help Bad throttle position

engine surges at idle and bogs until about 5 k rpms are reached ,if you push throttle to about passing gear than it takes off like a shot ,,how ever you can;t drive in town like this (which engine. ??

...engine surges at idle what causes the engine to have surges when idle hot engine or cold, or both??????????????????? surging or hunting idle is complex but for sure the ECU has lost control of idle ...

...surges, it means its trying hard to gain back control. this is called a software servo loop. The ECU is programmed to hold rpm near say 800 RPM hot. and is very digressive in that role. I have a 91 ...

...engine surge. The surge rpm is equal to fast idle. The repeating cycle is 10 seconds normal idle, and 2 seconds surge to fast idle then back to normal idle. To confirm this cycle I watched for 10 ...

engine have high idle and surge, and when cruise control cable disconnected from throttle body idle returns to normal car ran fine before blown head gasket. Did head job, started car and got high idle

surges. A diagnostic scan of the engine management system should be performed to identify the issue. Exhaust restriction: A restricted exhaust system can cause a rough idle and power surges. Check the

...engine surges jumps up and down a few hundred rpm. * Blower motor * A/C control * Actuators How do I test these and where else should I look? If the operation of your A/C and heat is causing your ...