Check the hose clips for tightness and examine the trunking for any cracks or splits and plus all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best habit to find a leak is to have the engine management and warm and later vaporizer lighter gas /propane or brake cleaner as regards each joint in turn. If the engine rev s taking place you ve found your leak.
I did re-check them tho. The master tech did extensive tests upon the air flow meter and said it was good. when I unplug it and rule the motor, the car runs harsh and at 850ish. I can lonesome guess that my additional rebuilt ecu has an issue, or the tps needs to be re-adjusted, or somehow my maf has died in the midst of all this. I don't think the tps has that much run in the different of rpm though? I think it forlorn adjusts it going on for 1k..
next I begin the car, the engine surges happening with 1200 and 2000 rpm put up to and forth. I distorted the IAC and the TPS later no tweak in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to acclimatize the idle enthusiasm screw to lower the rpm and it would preserve for a while. Now, the engine is continuously surging to the point where I cannot steer it for distress of damage to the drive train. Any experienced solution?