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Originally Posted by marcucci
I guarantee you'll see an improvement in fuel economy and that it's much slower to react to changes in AFR than new.
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On the contrary, mpg suffered for the better part of a few years until the intake manifold/EGR valve were taken off and cleaned thoroughly. Now, mpg = 25-27 mixed highway/local.
Your suggestion is noted, but I'm going to adhere to the "don't fix it if it ain't broke" rule.