Hello, my Volvo S40 T4 year of construction 99 Ruckelt while giving gas and also does not have the full speed also in idle run it runs bad. It seems to me as if he has ignition oscillations, I also want to check that tomorrow, or. you know if it can also have other clock things I know with the Volvo engines not so well. p.s. had yesterday in operation the air mass meter pulled off to test that, since that is the engine control light on, you know whether the one at some point goes out again or I have to delete the error manually, or. the engine now remains in emergency run ? mfg