This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and appropriately not compensated for and can lean the engine out and can as a consequence allow the engine to rev happening gone not desired causing rude running. As its a mechanical idiosyncrasy it tends not to slant upon the defect well-ventilated and you can sometimes listen a hissing noise taking into consideration the engine running.
Its after that worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a under the weather pump will every repercussion in insufficient fuel creature delivered to the engine. Might next be worth cleaning out the idle enthusiasm run motor / valve as these acquire clogged taking place past carbon and some brake cleaner washed through helps clear things off.
I don't have any check engine lights unless I unplug the MAF sensor. with the MAF is plugged in after that the car will stall unless I put my foot on the accelerator. There is plus an intermittent popping sealed coming at idle.