SOURCE: My engine in my '03 toyota matrix xr dies.
check the mass air flow sensor it is hooked with air cleaner
SOURCE: engine doen't stay idle at steady rpms rev up and down by itself
Either you have a vacuum leak, a bad throttle body position sensor, or a bad throttle body.
If the throttle body is drive by wire (electronic) then it would be a bad throttle body.
If the throttle body is drive by cable (manually driven by a cable connected to the gas peddle) then it would be a bad throttle position sensor.
If the throttle body is bad the check engine light wil lbe on. If it is on have your codes read at your local parts dealer for free, and this will give you a clue as to which pices/parts you need to replace.
Have the car leak tested and the vacuum linse inspected for leaks as well.
SOURCE: 1993 Toyota Corolla revs high and will stay that
Automatic choke stuck on.Replace it the car is running to ritch.
SOURCE: 2000 toyota corolla ve engine will run at idle but
Install a new mass air flow meter i own this car ive had this issue with my own and several others
SOURCE: 1997 toyota starlet glanza v seems to lose power
Have you just started to have this problem recently? could be just some bad fuel. If not than I would lean towards checking or replacing your spark plugs & check spark plug wires for cracks. It could also be your catalytic converter is starting to plug up on you ? Check listed problems first before attempting anything else.
The missing while accelerating is likely due to ignition coils and/or spark plugs going bad. The missing while in park is a normal thing. The car has a rev limiter that will not allow the engine to rev to higher than 3000 RPM while in park.
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