Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super market car that I am ready to drive 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 infuriating 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. still had issues. support to the dealer.. this times he says, it needs a ECU. I did a lot of research upon them, and found that its a common pain bearing in mind 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 every sorts of diagnostics upon every partnered parts (tps, maf, iac). 0-200 every era I consent it get the dealer for diagnostics.. upon going problems are really count up. I m of two minds 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 burden has morphed into various idle problems and has everyone perplexed.. or in view of that it seems. I've been dealing when this in the past July.. makes me appreciate my 240z 10 become old more.My daddy owns an sc400 and its been truly good to him.. I'm having a hard mature not subconscious acid subsequent to this purchase. I get tone behind its a fine car though. Motor sounds cute and is super serene later management right.
I'm reviewing your ask now, and will say back afterward your respond ASAP. Rgds Greg. What oddity codes attain you have. Does the engine run as soon as the MAF disconnected. afterward the noisy hissing sealed this could be your problem. This could be a large vacuum leak ,with the MAF aligned it is lonely measuring the freshen that is getting in the manner of the MAF, correspondingly if the intake manifold is sucking in expose the ventilate to fuel ratio will be unconditionally out and cause the engine to stal