aperseghin Posted December 3, 2010 Share Posted December 3, 2010 Ok here is what I have 88 2wd efi aw4 172k I'm getting like 12 miles to gallon I have upgraded the injectors to 4 port I have changed air filter New tps/harmonic balancer/serp belt/spark plugs Oil change I do have a leaky exhaust with no cat could that cause an issue? What else should I do to it? Quote Link to comment Share on other sites More sharing options...
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