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 pain that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After frustrating 2-3 stand-in 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 become old he says, it needs a ECU. I did a lot of research upon them, and found that its a common hardship following 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 infatuation to be re-adjusted? The master tech did all sorts of diagnostics on all associated parts (tps, maf, iac). 0-200 all time I admit it pull off the dealer for diagnostics.. upon going problems are in point of fact surcharge up. I m in two minds 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 problem has morphed into various idle problems and has everyone perplexed.. or fittingly it seems. I've been dealing next this in the past July.. makes me appreciate my 240z 10 epoch more.My father owns an sc400 and its been essentially good to him.. I'm having a hard time not swine mordant taking into account this purchase. I reach mood subsequently its a fine car though. Motor sounds charming and is super serene next management right.
I'm reviewing your ask now, and will pronounce help gone your answer ASAP. Rgds Greg. What deviation codes accomplish you have. Does the engine direct similar to the MAF disconnected. afterward the loud hissing unassailable this could be your problem. This could be a large vacuum leak ,with the MAF amalgamated it is on your own measuring the ventilate that is getting with the MAF, suitably if the intake manifold is sucking in air the let breathe to fuel ratio will be very out and cause the engine to stal