This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and hence not compensated for and can thin the engine out and can after that permit the engine to rev in the works next not desired causing coarse running. As its a mechanical malfunction it tends not to approach on the idiosyncrasy fresh and you can sometimes hear a hissing noise taking into consideration the engine running.
Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me tell you a little more nearly the problem history. It currently has a master tech endorsed idle expose control valve and tps installed. without upsetting anything, the last (used) ecu and my original, would control in the car without this symptom.
I'm reviewing your ask now, and will broadcast assist later than your reply ASAP. Rgds Greg. What deviation codes realize you have. Does the engine manage when the MAF disconnected. subsequent to the noisy hissing sound this could be your problem. This could be a large vacuum leak ,with the MAF connected it is lonely measuring the let breathe that is getting as soon as the MAF, in view of that if the intake manifold is sucking in expose the expose to fuel ratio will be extremely out and cause the engine to stal