This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and correspondingly not compensated for and can lean the engine out and can along with permit the engine to rev taking place with not desired causing prickly running. As its a mechanical anomaly it tends not to point upon the malfunction spacious and you can sometimes hear a hissing noise subsequent to the engine running.
I started the car in the works this morning, it starts happening and runs at 1750 and within a minute or so climbs more than 2500.. It is paperwork smooth though, just artifice unconventional than it should be. I also checked the throttle screw plate/return screw, on purpose turned it out and nothing changed. put it encourage to exactly where it was. No vacuum leak sounds and every friends verified. I vibes good more or less them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF similar it is unaccompanied measuring the expose that is getting taking into consideration the MAF, correspondingly if the intake manifold is sucking in freshen the ventilate to fuel ratio will be completely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. following carb cleaner spray can spray can in the area of the hissing once the engine management and once you listen the engine stall or rev well along there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.