Troubleshooting engine motor revving too high, and loss of power while driving

Hi Stephen, The problem with the idle speed being to high could be with the cold start up idle motor, located on the throttle body, more especially if the idle speed is erratic with surges of increasing and decreasing speeds. If the idle speed is high and without surging the problem could be a broken or loose fitting vacuum pipes. Check to make sure all are fitting tightly and they are not cracked, broken or loose. Lastly there could be a problem with the intake manifold gasket.Lack of power could be related to the above, or if your vehicle is fitted with a distributer, the ignition timing may require setting. If required, the job must be carried out with a stroboscopic timing light and a bridge connecting T to E1 inside the diagnostic socket (usually located on the fire wall above the gear box side of the engine. Paint a spot a white paint on the timing cover on the TDC mark and another in the notch on the crankshaft pulley, Start the engine and leaving it idling at 650 rpm loosen and adjust the distributer by aiming th timing light at the front pulley, moving the distributer until the painted marks align with one another. Lack of power can also be due to poor service, a clogged fuel or air filter or a fuel pump becoming lazy (Though this is unlikely as they either work or fail) Have the engine cylinder compressions tested.and make sure it is with specifications. Hope this info is some help? Regards John