2003 Ford Expedition "cause fluctuating rpm" Questions

...rpm then goes out at idle, no lost of voltage on dash gauge There may be no loss of voltage, but is there a surge of voltage? As for the battery itself when tested, it should read 12-12.5Volts across ...

...cause fluctuations in RPM's: any problem with oil pressure sensor shall as per the signals by ECM, will try to shut the engine down, as a precautionary measure. This is because, if the engine oil ...

RPM fluctuation can be anything (both caused by mechanical or electrical changes or failure/s). Fuel pressure, engine compression, 02 sensors, worn or sticking TAC unit, vacuum leak, poor fuel quality

cause rpm gauge needle to fluctuating from1000 to 2000? 1998 chevrolet lumina 3.1L when driving down the highway sometime the rpm needle be fluctuating from 1000 to 2000 and when it do that the car be

...the automatic idle speed control motor, they are likely full of cylinder backwash deposits and this causes the problem. Use throttle body spray celaner form the auto parts store and after cleaning ...

...to worry about. It will fluctuate more if you have the ac or heater going. The fluctuation is caused by surges in the electrical current. If its happening more rapidly you may have an oxygen ...

...and is constantly fluctuating. does it fluctuate just when its cold or all the time. cause the idle is elecronicly controlled. so you should bring it in and ask them to hook up a scan tool to you

...cause power fluctuations? I was pulling a stick rake, when it sounded as if my L3240 started missing. RPMs dropped to 2000, and fluctuate between 1800-2900 at idle. When I putit in gear holds around ...

I have a 2001 dodge Dakota sport 2.5L it started idling at 3000 rpm and it would fluctuate up and down when I shift gears I replaced all the vacuum lines and the IAC any ideas what's causing it Change

...fluctuating rpm check engine light Hello, I drive 2007 corolla with 97,000 mile. Recently, I noticed a slight drop in RPM level while stop this sometimes caused vibration though the engine not off. ...