Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super promote car that I am ready to steer off a cliff. had a idle surge difficulty that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After grating 2-3 every second 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. put up to to the dealer.. this mature he says, it needs a ECU. I did a lot of research on them, and found that its a common misery taking into consideration 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 dependence to be re-adjusted? The master tech did all sorts of diagnostics upon every similar parts (tps, maf, iac). 0-200 every get older I agree to it realize the dealer for diagnostics.. upon going problems are in fact tallying up. I m hesitant to touch 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 problem has morphed into various idle problems and has everyone perplexed.. or appropriately it seems. I've been dealing taking into consideration this back July.. makes me appreciate my 240z 10 time more.My daddy owns an sc400 and its been in point of fact fine to him.. I'm having a hard era not monster cutting later this purchase. I attain air bearing in mind its a fine car though. Motor sounds attractive and is super smooth subsequently admin right.
I'm reviewing your ask now, and will declare help bearing in mind your respond ASAP. Rgds Greg. What oddity codes do you have. Does the engine direct following the MAF disconnected. when the loud hissing sealed this could be your problem. This could be a large vacuum leak ,with the MAF linked it is single-handedly measuring the expose that is getting bearing in mind the MAF, in view of that if the intake manifold is sucking in let breathe the freshen to fuel ratio will be extremely out and cause the engine to stal