5 2 Engine Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super shout from the rooftops car that I am ready to steer off a cliff. had a idle surge problem that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After exasperating 2-3 oscillate 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. 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 difficulty later this car.. bought a used one.. more trouble. had the original 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 related parts (tps, maf, iac). $100-200 every grow old I acknowledge it attain the dealer for diagnostics.. upon going problems are in point of fact adding up. I m unsure to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason

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I started the car stirring this morning, it starts in the works and runs at 1750 and within a minute or for that reason climbs higher than 2500.. It is paperwork serene though, just habit superior than it should be. I afterward checked the throttle screw plate/return screw, intentionally turned it out and nothing changed. put it urge on to exactly where it was. No vacuum leak sounds and every connections verified. I tone good just about them as I've been in there a bunch of times..

Hello the TPS does have an effect upon switching the car into idle mode for that reason I'd recommend to make certain the throttle dish is 100% closed and not slightly beached subsequently carbon. and subsequently get used to the TPS correspondingly that the IDL fix is continuous to the E2 pin past the throttle is closed, and log on circuit later the throttle is just cracked. Don't worry virtually any voltages, the IDL get into is the in point of fact important one.

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