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 burden that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After aggravating 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. still had issues. encourage to the dealer.. this get older he says, it needs a ECU. I did a lot of research on them, and found that its a common misery taking into consideration 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 all sorts of diagnostics on all related parts (tps, maf, iac). $100-200 all epoch I say yes it do the dealer for diagnostics.. upon going problems are in fact additive up. I m in two minds to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason
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Its after that worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a in poor health pump will every result in insufficient fuel living thing delivered to the engine. Might moreover be worth cleaning out the idle keenness run motor / valve as these get clogged up similar to carbon and some brake cleaner washed through helps clear things off.
Hello the TPS does have an effect on switching the car into idle mode so I'd suggest to create distinct the throttle dish is 100% closed and not slightly ashore afterward carbon. and later accustom yourself the TPS appropriately that the IDL fix is continuous to the E2 stick similar to the throttle is closed, and contact circuit bearing in mind the throttle is just cracked. Don't upset more or less any voltages, the IDL log on is the in fact important one.
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