Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super spread around car that I am ready to drive off a cliff. had a idle surge burden that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After irritating 2-3 alternative used IAC s, I took it to the master tech at lexus. He said it was the IAC valve. He tried my used ones.. and finally a rebuilt one. yet had issues. help to the dealer.. this become old he says, it needs a ECU. I did a lot of research on them, and found that its a common pain subsequently this car.. bought a used one.. more trouble. had the original one rebuilt by a specialist.. and that s where I am at now.. Put it in tonight and the car idles at 2k rpm. Does the TPS craving to be re-adjusted? The master tech did every sorts of diagnostics upon every joined parts (tps, maf, iac). 0-200 every times I take it complete the dealer for diagnostics.. upon going problems are in fact adding up up. I m undecided to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car stirring this morning, it starts occurring and runs at 1750 and within a minute or appropriately climbs on top of 2500.. It is organization smooth though, just quirk far along than it should be. I moreover 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 all links verified. I environment fine very nearly them as I've been in there a bunch of times..
I don't have any check engine lights unless I unplug the MAF sensor. like the MAF is plugged in then the car will stall unless I put my foot on the accelerator. There is as a consequence an intermittent popping unassailable coming at idle.