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) upon tps, iac and maf and cleaned the TB. After bothersome 2-3 swap 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 period he says, it needs a ECU. I did a lot of research upon them, and found that its a common suffering in the same way as this car.. bought a used one.. more trouble. had the indigenous 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 infatuation to be re-adjusted? The master tech did every sorts of diagnostics upon every similar parts (tps, maf, iac). 0-200 all epoch I bow to it attain the dealer for diagnostics.. upon going problems are in reality totaling up. I m of two minds to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason
I did re-check them tho. The master tech did extensive tests upon the freshen flow meter and said it was good. subsequent to I unplug it and direct the motor, the car runs uncompromising and at 850ish. I can isolated guess that my additional rebuilt ecu has an issue, or the tps needs to be re-adjusted, or someway my maf has died in the midst of all this. I don't think the tps has that much control in the vary of rpm though? I think it abandoned adjusts it roughly speaking 1k..
Hello the TPS does have an effect upon switching the car into idle mode appropriately I'd suggest to make distinct the throttle dish is 100% closed and not slightly stuck when carbon. and after that acclimatize the TPS as a result that the IDL attach is continuous to the E2 attach in the manner of the throttle is closed, and entry circuit with the throttle is just cracked. Don't badly affect approximately any voltages, the IDL gain access to is the in point of fact important one.