Thank you for this comment
My mechanic has checked the timing belt and it is well positioned
I had already switched the throttle air and it didn't help
I also replaced the coils, spark plugs, air filter, fuel pump and nebulizers
You mean a vacuum leak, where?
From the exhaust or from the engine body?
I measured the engine pressure and it was fine
And I cleaned the catalytic converter in the exhaust but didn't clean the muffler. Could the muffler clog up? This is a problem you think
And thank you very much for your reaction