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Re: 95 2 door Yukon original 5 speed
We just got 17 mpg in our 2000 Suburban. Downhill run from Gardnerville to Rancho Cucamonga. That's with a bad after cat O2 sensor on the drivers side!
Of course it's an LS engine with a different injection system, but not bad for a 251,000 mile engine.
Just for a trial I would re-install the spacer above the throttle body and see if the velocity stack feature of that would increase airflow and atomization.
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