Im thinking of giving up on my car but its been having this problem since i adjusted the throttle wire to tighten clearence between foot pedal andactual moving throttle plate i doubt this matters but maybe this helps?... trans shifts when i let go of the gas pedal or around corners @ 4k rpm when going 55-60mph if i let go of the gas the rpms drop and engine stalls shuts off while moving any idea what causing ths?
SOURCE: high idle 1997 Madza 626 4 cylinder auto transamission
The PCM controls idle speed to ensure good driveability. The PCM will only attempt to maintain the desired idle speed when it “knows” the throttle is closed. A throttle switch or the TPS input is used to determine when the throttle is in the idle position. Motors and solenoids are used by most PCM’s to control idle speed. Many PCM’s are programmed to attempt to control the idle speed by adjusting spark timing and then by controlling the idle speed actuator. Some computers of the early 80's did not control idle speed.
SOURCE: 2003 Kia Spectra Loss of power during exceleration
Hi,
The air cleaner mighty be clogged causing insufficient air supply. That is why it runs fine on idle because less air is needed and when the engine demands for more air, there isn't enough.
SOURCE: 2002 Ford Taurus has problems accerlerating...
It sounds like the fuel is not being delivered sufficently to the engine. Try looking here. Perhaps a fuel injecter cleaner (you can pour Seafoam into the gas tank and it is a great fuel injecter cleaner and fuel stabilizer). What did your plugs look like when you replaced them? This can tell you a lot about the combustion chamber. A Haynes manual will be invaluable to you.
SOURCE: Engine suddenly revs when stopped & @ idling
sounds like one of the metal arms connected to the engine may be getting stuck some how. have someone get in car and press on gas when car is off while you watch engine to see what is moving, then check those arms to see if there is any possible obstructions or knicks or something on them
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