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Old 01-12-2019, 10:27 AM   #23 (permalink)
racprops
Master EcoModder
 
Join Date: Oct 2009
Location: Phoenix AZ
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Quote:
Originally Posted by rmay635703 View Post
Before my 1989 Diesel suburban 5mt rusted out I was getting around 30mpg highway 2.8 rear end and nv3500
That body isn’t much different than your van

That was not at 80mph and my guess is your not going to get much improvement at that speed
You maybe right, but I got to try...by the way that 14MPG seems to be at nearly any speed above 55 MPH....up to 80/85 MPH...and yes I felt something was wrong, my best guess is it cannot meter fuel at all.

Saw such "performance" on a day trip up I17 to Sedona AZ. and back...odd as a good part of that run was up hill.

Rich
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