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So i went to fill up today and to my surprise i got 36.34 MPG. I'm quite dissapointed to say the least :-(. I guess what i need to do is splurge for some instrumentation like the MPGuino or a vacuum gauge. I have replaced plugs with regular copper core NGKs, cleaned the throttle body and EGR, seafoamed the intake and gas tank (1/2 a bottle for each) I guess i should finally get around to replacing my ECTS even though it seems to be working ok (needle almost to halfway mark). How much can the ECTS affect gas mileage?
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