Supercharged111
Truly Awesome
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- Aug 20, 2015
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It’s not the only reason but it is a contributing factor. He went up basically 4 tire sizes. Either regear or go to stock size or very close to stock. He may get away with 265/75s with those gears and not suffer too much. And that big a tire will tank mpg. I went from 265/75/16 to 285/75/16 on my diesel 7.3 Ford and I’m priced a difference right away. My mpg dropped also. I went back to the stock size
The trans should be a 700r4 unless someone did a complete swap along with computer and harness for a electronically controlled trans. If it’s a 700 check the TV cable for misadjustment
Your tires are way too big for that gear ratio. Your trans isn’t shifting right because of the tire size.
The thermostat is keeping the engine on the cool side ( not in a good way) Sonora running open loop and dumping fuel
Trying to bring the engine to operating temp and it can’t so it’s running open loop.
Install correct temp thermostat I believe 195 *
Install normal size tires. Yeah it won’t look as cool
Recalibrate the computer for a 350 ci and get the right injectors.
30 psi is too low. Your tires are under inflated.
4 sizes? That's one size bigger than stock for my 1500. And even a 160 stat will have you in closed loop. Is this 100% city driving? Try 3rd gear on the highway and see what you get.