Not sure what to try next, the engine chugs, RPMs fluctuate and car hesitates...tried to pull the code off the computer, and there is no code...replaced the throttle position sensor still same problem..not sure what to try next...any suggestions are welcome.
How many miles? does it idle in park ok? have it had a tune up ? have you tried a gas cleaner that you pour in the gas tank?
It has 77K on it. It does the same thing in park as in drive, just recently bought the car used so, I am not sure when the last tune up was done on the vehicle. Have not tried a gas cleaner in the gas tank.
I hope you did not buy some ones head ache. I see a lot of cars that people buy that have hidden problems. so no codes
I just looked up known problems. wow . first have the timing belt checked . your problems is the idle air control valve
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SOURCE: 2006 Chevy Aveo - Accelerator Pedal position Sensor - Parts
I hate to be negative but there is not a big aftermarket for your car, try googling it, if you get nothing chevy may be the way to go.
SOURCE: 2005 Chevy Aveo - engine light and hold lights flash
I also had the same problem, But the problem lies in the switch the actual hold switch on my aveo there is a side entry way you can pop off the one on the left will give you access to the switch. what could of happen is theres is condensation in inside the switch. then when it gets cold it freezes causing the switch to malfunction. This could happen either by spilling something on the switch or using a cleaning solvent like armorall, YOU MUST BE CAREFULL WITH ANYTHING LIQUID NEAR THE HOLD SWITCH. Also the car going from warm when you drive then cold when you park it at night. My car was in warranty and remind you I came up with is the dealership had no idea what was wrong. they reseted the computer it worked for a week then was happening again. I have knoweldge in switches/wiring so i decided to check pot the switch and open it up and sure enough there was condensation took it to dealer told them to try a new switch works perfect and going on 5 months with out problems. Replacing the switch can solve pretty much every problem that is stated here i think. Also take a look at the wiring and connections for older aveos
SOURCE: I am needing to replace the throttle position sensor
It is located in the large hose coming from the air filter it just pulls out
SOURCE: hold light blinking, check engine light on, engine slows down
check tps sensor (throttle position sensor in backside of the throttle cable) and map sensor (manifold absolute pressure on front little 1 inch sensor with vacuum line) make sure there plugged in. the ecm (engine control module driver side inner fender) and tcm (transmission control module under dash) both need the data to know when to upshift and increase fuel/air. Otherwise the computer runs default values and guesses off of other sensors giving poor performance. also disconnect battery for 15 min. usually resets aveo service lights if you dont have a scanner.
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When did you last change your fuel filter? If it's dirty it will cause that problem. If your like most people they don't even know they have a fuel filter. With the rotten gas we get today I'd change mine with every oil change. Mine is less than 10 bucks.
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