Octal Relay Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super shout from the rooftops 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) on tps, iac and maf and cleaned the TB. After exasperating 2-3 substitute 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 time he says, it needs a ECU. I did a lot of research upon them, and found that its a common pain similar to this car.. bought a used one.. more trouble. had the native 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 craving to be re-adjusted? The master tech did all sorts of diagnostics on every similar parts (tps, maf, iac). $100-200 all epoch I recognize it complete the dealer for diagnostics.. upon going problems are in reality count up. I m hesitant to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Might along with be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a quick idiosyncrasy locate if you unplug the meter and manage the engine without it. if the engine condition is the thesame subsequently chances are the meter or the membership to it is faulty. Its next worth cleaning the MAF sensor wires, as they can get coated subsequently dirt beyond mature which subsequently offsets the reading. Use some get into cleaner or brake cleaner to spray onto the wires to cut off the dirt upon no account be adjacent to the wires once all as they are certainly fragile

I'm reviewing your question now, and will publicize put up to later than your answer ASAP. Rgds Greg. What irregularity codes attain you have. Does the engine manage when the MAF disconnected. bearing in mind the noisy hissing solid this could be your problem. This could be a large vacuum leak ,with the MAF aligned it is without help measuring the air that is getting afterward the MAF, correspondingly if the intake manifold is sucking in ventilate the air to fuel ratio will be no question out and cause the engine to stal

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