Quote:
Originally Posted by ChewChewTrain
With the engine running, you can't use any less gas than an idle. I'd like to know how far I'm pressing the gas pedal compared to not pressin at all. Is there such a gauge? BTW, I have a 1989 car with NO OBDI.
Thanks!
Doug in Oakland, California
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Doug, you appear to have made a faulty assumption about gas consumption being linear to throttle position.
Get a vacuum gauge and mount it where you can see it without being distracted from driving. It will have a single port on the back and you will want to run an 1/8" vacuum line (vacuum line has a heavy wall so it doesn't collapse) to the intake manifold and tee off an existing vacuum port. You'll want to find one that is down stream of the throttle blades.
When you drive, try to keep the needle as high as possible. It will be quite a challenge but will lead you to more economically driving techniques.
The gauge will pay for itself but you'll probably find that driving economically will not make you popular with commuters that are in a hurry.