Quote:
Originally Posted by Duke2.6
Run the same test with the R16/1 resistor removed.
Another trick is to never use WOT unless you plan to rev the engine all the way or near the redline. Half to three-quarter throttle below about 3500 revs will cause manifold vacuum to go to near zero, but it stays in closed loop mode maintaining stoichiometric A/F ratio. When you push the throttle all the way to the floor, the WOT switch on the throttle body tells the KE system to go into open loop, which adds about 10-20 percent excess fuel. Power improves slightly, but not enough to make much difference in acceleration considering the extra fuel being consumed.
There's no point wasting fuel when your slogging around town in traffic. Then when you get a clean shot at a freeway on-ramp - bounce it off the rev limiter!
Duke
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Will do. In fact, I'm going out to pull it today.
I'm well aware of the WOT fuel dump. Total waste. In fact, it never sees WOT unless the cruise control causes it on a fairly steep highway upgrade. I now know these upgrades and perform a 3-4 downshift prior to the arrival at the bottom of the grade. I am betting that it is more efficient in 3rd at 3100 than it is in 4th at 2250 when it takes WOT to hold it at 2250.