Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super push car that I am ready to steer off a cliff. had a idle surge hardship that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After frustrating 2-3 interchange 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. nevertheless had issues. assist to the dealer.. this grow old he says, it needs a ECU. I did a lot of research upon them, and found that its a common hardship subsequent to this car.. bought a used one.. more trouble. had the indigenous 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 all sorts of diagnostics upon every joined parts (tps, maf, iac). 0-200 every time I give a positive response it attain the dealer for diagnostics.. on going problems are in point of fact adding up up. I m unsure to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason
I bought it in July, drove it house from LA (to Utah), and the problems started rapidly after I got it home.Any new assist you can offer is appreciated. I don't know what else to attain but admit it back up to the dealer. I know I've got the shop foreman in action upon it at the dealer, but I nevertheless atmosphere its pushed to the encourage as its dated and everyone loses in this situation.
I'm reviewing your question now, and will proclaim encourage following your reply ASAP. Rgds Greg. What deviation codes attain you have. Does the engine govern with the MAF disconnected. following the loud hissing strong this could be your problem. This could be a large vacuum leak ,with the MAF united it is by yourself measuring the expose that is getting next the MAF, appropriately if the intake manifold is sucking in air the freshen to fuel ratio will be unquestionably out and cause the engine to stal