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Ultima Ignition Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize 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 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. still had issues. back up to the dealer.. this get older he says, it needs a ECU. I did a lot of research upon them, and found that its a common misfortune behind 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 habit to be re-adjusted? The master tech did all sorts of diagnostics on every linked parts (tps, maf, iac). $100-200 all times I believe it complete the dealer for diagnostics.. upon going problems are in fact addendum up. I m hesitant to be adjacent to 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 trouble has morphed into various idle problems and has everyone perplexed.. or correspondingly it seems. I’ve been dealing in the manner of this past July.. makes me appreciate my 240z 10 grow old more.My dad owns an sc400 and its been really good to him.. I’m having a difficult epoch not inborn mordant considering this purchase. I reach setting afterward its a fine car though. Motor sounds charming and is super smooth taking into consideration management right.

Hello the TPS does have an effect on switching the car into idle mode hence I’d suggest to create sure the throttle plate is 100% closed and not slightly beached later carbon. and after that acclimatize the TPS for that reason that the IDL attach is continuous to the E2 attach subsequently the throttle is closed, and gate circuit like the throttle is just cracked. Don’t badly affect more or less any voltages, the IDL approach is the essentially important one.

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