Quote:
Originally Posted by theadmiral976
It's always interesting to log data like this. Recently, I had started to notice a slight dip in my fuel economy (~2 mpg highway, up to 5 mpg city). I logged data for a few days and uncovered slight changes in air flow that led me to a rather significant leak at my exhaust manifold (rusted gasket - I live in the Rust belt). Curiously, the exhaust leak noise I would have expected to hear wasn't very apparent in my situation, probably due to some combination of aftermarket header and catback exhaust. Anyway, replaced the gaskets and am getting the best fuel economy I've gotten in years (~32 mpg on 93 and 27 mpg E85 highway).
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Yea that's why I started logging. Noticed the miles I was getting from a full tank to halfway dropped and full to 1/4th dropped. Seems like my fuel trims doesn't show leaks but I bought gaskets just incase. Took my overpipe, midpipe, frontpipe off a couple times to install parts but just reused the gaskets.