I'm driving a 92 Subaru Legacy Turbo. So far I've tried cranking up the boost from the turbo to help it force air though faster so less fuel makes it to the engine. And introduced some weight reduction to the equation so that way it will get better mileage, not much else. Just figured I'd drop in and say hi.
i beleve the computer will not "self tune" that much he would need to chip it to get more fuel to go in .. the fuel is controlled by the TPS sencer and the O2 ..if anything a stock motor is pig rich from OEM and most cars you can pull out gas and save crazy amts with a cheep "chip"
AFAIK, TPS has much less to do with fuel than MAF. It measures air flow, checked mixture on O2, and injects enough gas to keep it from getting too lean. If it gets too lean, as we all know, there is risk to the engine.