Check the hose clips for tightness and examine the trunking for any cracks or splits and next all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best habit to locate a leak is to have the engine executive and hot and then spray lighter gas /propane or brake cleaner concerning 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 on the let breathe flow meter and said it was good. in the same way as I unplug it and run the motor, the car runs rough and at 850ish. I can deserted guess that my other rebuilt ecu has an issue, or the tps needs to be re-adjusted, or anyhow my maf has died in the midst of every this. I don't think the tps has that much manage in the alternating of rpm though? I think it unaccompanied adjusts it just about 1k..
in the same way as I start the car, the engine surges going on amongst 1200 and 2000 rpm encourage and forth. I misused the IAC and the TPS once no change in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to adjust the idle rapidity screw to belittle the rpm and it would preserve for a while. Now, the engine is forever surging to the point where I cannot steer it for alarm bell of broken to the drive train. Any experienced solution?