[Chrysler kid]

Just went through a long article published in 1999, but basically the car needs to have a 5 wire 02 sensor to engage lean burn. The 3 stage VTEC contains the VTEC E cam settings that are used when the engine is up to operating temperature.

On the hx and vx the egr valve is used to quickly make the car go up to operating temperature so the car can run optimally under the vtec-e cam settings. If the egr valve is not functional the idle control valve makes the car idle higher so the car doesn't misfire at idle from the cam settings

Essentially your lean burn indicator is a stage 1 VTEC cam setting indicator for when the vehicle can operate at the vtec-e can settings. Otherwise the car operates in its second stage.

Apologize in advance if I read it wrong. But it does specifically mention a 5 pin 02 wire is needed in order for the computer to stay in advanced closed loop settings


My head hurts. There is no definition of sources on Any of this stuff.

So my last quest, lean burn operates when only one valve is open to reduce consumption. So technically my hx has 3 cam settings. High horse power VTEC, normal cam operation idling, and full max hp VTEC?