Halo Light Wiring Diagram

This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and therefore not compensated for and can lean the engine out and can afterward allow the engine to rev taking place subsequently not desired causing unfriendly running. As its a mechanical anomaly it tends not to slant on the malfunction open and you can sometimes listen a hissing noise gone the engine running.

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Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me tell you a tiny more very nearly the pain history. It currently has a master tech approved idle air run valve and tps installed. without disturbing anything, the last (used) ecu and my original, would direct in the car without this symptom.

later I begin the car, the engine surges taking place amongst 1200 and 2000 rpm back up and forth. I distorted the IAC and the TPS similar to no regulate in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to become accustomed the idle keenness screw to demean the rpm and it would preserve for a while. Now, the engine is continuously surging to the tapering off where I cannot drive it for distress of broken to the drive train. Any experienced solution?

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