Thanks for the wisdom. I roughly calculated out the difference in performance due to 2" taller tires, and, like you said, decided I need more engine tuning if it's going to run well. I am 90% sure the O2 sensor is bad. Burning coolant is supposed to do bad things to them, right? And I haven't the foggiest idea when it was last replaced. I need to look at timing and check plugs, too. But the fuel filter is new. I already replaced it and made a big difference. The PCV valve is shot but inaccessible and unavailable -- some invention will be needed there.
Would someone mind educating me me on back pressure? I know nothing except that vehicles always "feel" more zippy when they don't have exhaust leaks.
Tune, tune, tune! learn, learn learn!! I won't be happy until I can shift to 5th at 40 like the manual says.
Lewis
for S&G's run one of these in place of your PCV.
http://www.autozone.com/external-engine/performance-breather-filterid definitely replace all of your maintenance stuff.
Logged
2007 GMC Yukon SLT Daily
5.3L V8, 3.5in Lift, 33X10.5R18 Toyo MTs, Vision Rocker 18x9s powdercoated Mountain Blue Transparent over Speedboat Aluminum
2010 Chevy Tahoe LT Wife's Daily
5.3L V8, 6in Lift, 35s, AMP power steps
2016 Ford F250 XLT CCLB Work/Business Truck
6.2L V8
2001 Ford F350 Lariat CCLB Work/Business Truck
7.3L Powerstroke w/ Banks Turbo
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