Hey!
I have a problem, high RPM on ignition and and neutral. After cleaning the throttle on my chevy optra 2005, problem hasn't solved. Is there any chance that I need to perform throttle position leaning? if so, how do I do that?
Been researching for quite a while and didn't find a solution.

 

I'd recommend check for a vacuum leak.

 

I've swapped to 2 different throttles (second hand, definitely not new ones). one had the same symptoms and the third one had a leak on its water connection so at the moment we've made a bypass so the water do circulate but throttle is way better now. Do you think ordering a new one might fix the problem? AliExpress is recommended to buy a new throttle from?

BTW been experiencing a big downfall on the cars torque, I'm giving a decent amount of gas and the car's acceleration is damn lazy, on uphills I'm sweating to each 60km/h and beyond that is put of reach (on uphills)

I was adviced to try 44K fuel additive in order to clean the fuel injectors, what do you think about that?

 

use injector cleaner will help. If your in doubt about the throttle body, you'll probably end up replacing it anyway, so.

 

Is the check engine light on?

 

Yes P0314 Camshaft position sensor A, I've replaced it to a new one and reset the fault codes, and still the check engine light turned on with the same fault code

 

This might help some.

https://www.obd-codes.com/p0314

 

Hi, I have the same problem with my Lacetti 2005. 1.6 and I need help how to perform throttle position learning after cleaning throttle valve. Thanks in advance!

 

Solved by replacing - reinstaling complete software with original one. BTW Optra = Lacetti. Best regards if I can help someone.