Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super present 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 different 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. nevertheless had issues. incite to the dealer.. this grow old he says, it needs a ECU. I did a lot of research upon them, and found that its a common pain later 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 obsession to be re-adjusted? The master tech did all sorts of diagnostics upon every amalgamated parts (tps, maf, iac). $100-200 all mature I take it complete the dealer for diagnostics.. on going problems are truly adjunct up. I m in two minds to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason
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I bought it in July, drove it house from LA (to Utah), and the problems started unexpectedly after I got it home.Any additional encourage you can meet the expense of is appreciated. I don't know what else to complete but acknowledge it encourage to the dealer. I know I've got the shop foreman vigorous on it at the dealer, but I nevertheless air its pushed to the support as its old and everyone loses in this situation.
Hello the TPS does have an effect upon switching the car into idle mode correspondingly I'd suggest to make sure the throttle plate is 100% closed and not slightly high and dry subsequent to carbon. and after that adapt the TPS thus that the IDL fasten is continuous to the E2 glue gone the throttle is closed, and right of entry circuit subsequently the throttle is just cracked. Don't worry roughly any voltages, the IDL door is the in point of fact important one.
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