Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make public 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 exasperating 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. yet had issues. back up to the dealer.. this grow old he says, it needs a ECU. I did a lot of research on them, and found that its a common misery 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 habit to be re-adjusted? The master tech did all sorts of diagnostics upon every joined parts (tps, maf, iac). $100-200 all era I understand it reach the dealer for diagnostics.. on going problems are in fact totaling up. I m in two minds to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason
Might plus be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can realize a quick deformity find if you unplug the meter and manage the engine without it. if the engine condition is the same next chances are the meter or the connection to it is faulty. Its also worth cleaning the MAF sensor wires, as they can get coated in imitation of dirt exceeding become old which subsequently offsets the reading. Use some entry cleaner or brake cleaner to vaporizer onto the wires to separate the dirt upon no account touch the wires bearing in mind whatever as they are categorically fragile
Hello the TPS does have an effect upon switching the car into idle mode for that reason I’d recommend to create certain the throttle dish is 100% closed and not slightly grounded later than carbon. and later familiarize the TPS fittingly that the IDL stick is continuous to the E2 stick taking into account the throttle is closed, and way in circuit in the manner of the throttle is just cracked. Don’t trouble virtually any voltages, the IDL contact is the in reality important one.
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