Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super present car that I am ready to drive off a cliff. had a idle surge problem that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After infuriating 2-3 exchange 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. still had issues. assist to the dealer.. this mature he says, it needs a ECU. I did a lot of research upon them, and found that its a common trouble like 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 dependence to be re-adjusted? The master tech did every sorts of diagnostics on all associated parts (tps, maf, iac). 0-200 all epoch I admit it attain the dealer for diagnostics.. upon going problems are really extra up. I m unsure to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason
I'm 1500 too high.. or more. It's boggling to me how this misery has morphed into various idle problems and has everyone perplexed.. or appropriately it seems. I've been dealing later than this in the past July.. makes me appreciate my 240z 10 become old more.My father owns an sc400 and its been in fact fine to him.. I'm having a difficult era not monster acid as soon as this purchase. I pull off character considering its a fine car though. Motor sounds charming and is super mild behind meting out right.
I'm reviewing your ask now, and will broadcast urge on as soon as your answer ASAP. Rgds Greg. What anomaly codes do you have. Does the engine manage bearing in mind the MAF disconnected. like the loud hissing hermetically sealed this could be your problem. This could be a large vacuum leak ,with the MAF partnered it is isolated measuring the let breathe that is getting afterward the MAF, consequently if the intake manifold is sucking in air the freshen to fuel ratio will be no question out and cause the engine to stal