Quote:
Originally Posted by bart_dood
What about bypassing the EGR valve so my engine isn't sucking in its own poop? Although I am very knowledgable regarding gas engines, I am struggling to comprehend whether hot exhaust gas in the intake would make any difference to economy or not?
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I'm curious about this as well. I imagine the EGR will have some effect on fuel economy, but I'd love to know how much. Perhaps after I rebuild my injectors I'll do a test. On the '87, the EGR doesn't function at highway speed, so the effect will only be in city driving. I've left my EGR intact because I'd like to keep my environmental footprint small, and the difference in performance isn't important enough to me. If the fuel economy were significantly different I might reconsider... trading less CO2 against more NOx.