Jun 21, 2015 · During this period the idle may be higher than normal. It should slowly drop as the engine heats up. Watch the engine temp gauge and note when it reaches operating temp. Then continue to let it idle for an additional 5 minutes. It will continue to adjust idle during this period. 6) Drive the vehicle at various speed so the PCM learns shift points.
Dec 02, 2019 · The (EGR) valve has changed design many times over the years. Most older EGR systems use a vacuum regulated valve while newer vehicles tend to have an electronic valve to control exhaust gas recirculation. At idle speed the valve should look closed. There is no EGR flow into the manifold. Oct 21, 2020 · Idle Air Control (IAC) The IAC regulates the amount of air entering the engine to control engine idle speed. Carbon gradually builds up on the IAC valve and threads, restricting air flow into the engine. That mimics a vacuum leak and rough idling, or worse, sticking and causing your engine to stall when idling. When the mixture control is moved to lean, it closes the vent valve, and pressure in the float chamber is decreased to a pressure that is essentially the same as that of the discharge nozzle. This decreased pressure differential decreases the flow of fuel. g. MIXTURE CONTROL, (Ref. appropriate figure for a particular model). – The mixture control Causes. Possible causes of OBD code P0011 Kia A P0011 Kia DTC trouble code may be caused by one or more of the following: Incorrect camshaft timing Wiring problems (harness/wiring) in intake timing control valve control solenoid system Continuous oil flow to VCT piston chamber Failed timing valve control solenoid (stuck open) When the temperature rises, the bimetallic strip opens the valve and allows air to enter the throttle bores under the throttle plates, which leans out the idle mixture and raises the idle speed. Higher idle speed makes the water pump move more coolant through the radiator and makes the fan move more air, thus preventing overheating during ... If your ignition timing is way off or if the automatic spark advance is stuck. These things can cause erratic idling and strange running. If it starts and idles good, but loses that good idle as it warms up. Check the valve clearance. If a valve is just a bit tight, it can leak a bit after things warm up and expand. Relief valve stuck open O-ring at the oil pipe in the crankcase damaged. Exhaust Smokes Excessively: White smoke: Piston oil ring worn Cylinder worn Valve oil seal damaged Valve guide worn Engine oil level too high. Black smoke: Air cleaner clogged Main jet too large or fallen off Starter plunger stuck open Fuel level in carburetor float bowl ... Jul 09, 2019 · A Ford Focus canister purge valve recall has been issued a second time following an identical recall in October 2018 to repair deformed gas tanks. Customers of 2012 and 2017 Ford Focus and 2013 ... When an engine is idling, there is a vacuum in the intake manifold. This vacuum pulls fuel out of the injectors, and increases the effective pressure across the injector to a pressure higher than the rail pressure itself. Oct 26, 2019 · Many years ago the writer bought a Commer van with a stuck engine. The poor aftermarket ignition wiring (the van originally had a diesel engine) had caused the engine to quit. The vehicle had been idle for over a year judging by its tax disc so Plus Gas was introduced into the plug holes daily for over a week. The idle actuators control engine air intake up to about 3000 RPM after which the throttle actuators open and let the bulk of the air come in. When an idle actuator fails, the throttle actuator takes over fully and the IA is taken offline by the DME. Hence the higher idle RPMs in limp mode to ensure the idle is relatively smooth.