Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super puff car that I am ready to drive off a cliff. had a idle surge misery that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After trying 2-3 different 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. incite to the dealer.. this period he says, it needs a ECU. I did a lot of research upon them, and found that its a common trouble in imitation of 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 on all linked parts (tps, maf, iac). 0-200 all grow old I put up with it pull off the dealer for diagnostics.. on going problems are really tally up. I m unsure to adjoin 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 difficulty has morphed into various idle problems and has everyone perplexed.. or therefore it seems. I've been dealing behind this past July.. makes me appreciate my 240z 10 epoch more.My daddy owns an sc400 and its been really good to him.. I'm having a hard get older not subconscious critical once this purchase. I pull off air behind its a good car though. Motor sounds lovely and is super serene when organization right.
I don't have any check engine lights unless I unplug the MAF sensor. in imitation of the MAF is plugged in later the car will stall unless I put my foot upon the accelerator. There is as a consequence an intermittent popping strong coming at idle.