Check the hose clips for tightness and examine the trunking for any cracks or splits and along with every the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best showing off to locate a leak is to have the engine running and hot and subsequently spray can lighter gas /propane or brake cleaner not far off from each joint in turn. If the engine rev s occurring you ve found your leak.
I did re-check them tho. The master tech did extensive tests upon the let breathe flow meter and said it was good. next I unplug it and manage the motor, the car runs gruff and at 850ish. I can unaided guess that my further 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 control in the alternative of rpm though? I think it solitary adjusts it in the region of 1k..
next I begin the car, the engine surges in the works amid 1200 and 2000 rpm encourage and forth. I changed the IAC and the TPS behind no tweak in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to accustom yourself the idle quickness screw to demean the rpm and it would maintain for a while. Now, the engine is continuously surging to the reduction where I cannot steer it for fear of damage to the drive train. Any experienced solution?