I just had a tune up and oil change and now the idle speed, when in park or neutral, is too high. it actually revs itself. I will jump up and down just below 1rpm and just above 3 rpms. Two garages both said thatey could reset it and both had no luck. My nexy stop is the dealer but they have been nothing but a headache any time I have to go to them. Any suggestions?
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18-22 DegreesBefore top dead center - When throttle positionsensor disconnected and using suitably programmedscan tool.When adjusting idle speed, set parking brake & chock drive wheels, curb idle speed (750-850 RPM)transmission in neutral.
8-12 DegreesBefore top dead center - throttle position sensorharness disconnected.When adjusting idle speed, set parking brake & chock drive wheels, curb idle speed (700-800 RPM)transmission in neutral.
8-12 DegreesBefore top dead center - throttle position sensorharness disconnected.When adjusting idle speed, set parking brake & chockdrive wheels, curb idle speed (700-800 RPM)transmission in neutral.
Is it possible the clutch pedal is interfering with the throttle? Start the engine in neutral and allow it to idle. Press only the clutch pedal down and see if this increase the engine speed. If it does speed up the engine and slows back down when you release the clutch then somehow this operation is where your fault lies. If it doesn't alter the idle speed, then rev your engine and release the throttle to see if it returns to idle immediately. If it is slow to return to idle then your throttle cable could be sticking. This means when you change gear lifting off the throttle has little effect and depressing the clutch to change gear causes the engine to race as the throttle is still partially open.
First thing check for engine control module fault codes, if you have a lean running code then you have a vacuum leak on the engine, this allows air to bypass the idle speed control system and raises the idle up. Another issue is a sticking Idle speed control air bypass valve, but that is not common and vacuum leaks are.
might be the CAM & CRANK SENSORS ! HAVE YOU CHANGED YOU AIR & FUEL FILTERS LATELY ? DO SO IF YOU HAVEN'T. DID YOUR SERVICE ENGINE SOON LIGHT COME ON ? IF SO, GO TO AN AUTOPARTS STORE, HAVE THEM PULL OUT ANY TROUBLE CODES,FROM ECM, IF IT SAYS CAM SENSOR, REPLACE THE CRANK SENSOR AT SAME TIME ! ALSO, THE OXYGEN SENSOR PLAYS AN IMPORTANT ROLE, YOU MIGHT REPLACE IT ASWELL . ALWAYS KEEP FILTERS NEW, OIL CHANGED EVERY 3000 MILES.
Adjust the idle revs when the car is in either neutral or park. (2000 rpm is too fast for idle speed).If it is a late model car and therefore has a computer system then what ever you do DON'T TOUCH THE IDLE SCREW. You'll throw everthing out of whack. It needs to be done via a computer. Hope this helps
mcdevito75 here, Sounds like the idle speed motor, Ford is known for these idle speed motors going bad, in the later stages the car races like crazy. have your repair shop check this idle speed motor and change it.