Idles high when in park around 2000 rpms or more at times, then idles high in gear around 1000 to 1500 rpms checkengine light on, had auto zone check it out they said misfire in number 4 cly. and 1 cyl. evap. ect. he suggested injection cleaner. just wondering if possably it could be a sencor or something like that?
I would start with ect. That is the engine coolant temperature (sensor). That sensor monitors the coolant temp and tells the computer to increase engine RPM so the engine warms up faster. In the mornings when you first start your car and it idols high, that sensor is sending that information. If you have a code for this sensor start there.
SOURCE: 2000 Chevrolet Venture multiple codes stalling and rough idle
Look for broke/ shorted wires on Crank sensor.. thanks
SOURCE: check engine light air Fuel mixture
When it comes on again let a regular shop scan it for you with a good scanner so they can see whats going on. a generic code reader wont do it. if it is stored in memory they can still check it. if the truck runs good idles fine just watch out for anything out of the norm , what about air filter and fuel filter have they been changed ? tune up ? air filters should be changed every 2 to 3 oil changes and fuel filter every 30k depending on fuel quality there. and tune up at 60 to 70 k even though they probaly said 100k.
SOURCE: '98 S10 4 cyl. 5 speed: Sudden high idle, now surges.
Go to your local shucks or auto zone and they can check any codes behind your check engine light and it's free. It sounds like one of two things a O2 sensor or your mass airflow sensor but they will tell you for sure
SOURCE: Burning smell,check engine light-misfire, rough idle 96 cavalier
Sounds like there is a blown piston, to be sure have a compression test done on that #2 cylinder, if the reading is low, then you'll know.
A friend of mine had a 95 that did simular things only a little more,
it started smoking, dash lights flickered, etc. Finally, he had to get rid of it, the piston rod went through the engine block.
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