greg_atlanta wrote:When Tommy got the plenum off he also noticed the injector harness was brittle, so he replaced that and removed/cleaned all the injectors.
Mileage has improved with clean injectors. From Atlanta to Roanoke, VA for turkey weekend -- averaging 10 mph over speed limit (75 or 80) -- I got 21.5 mpg on the way there and 21.7 mpg on the way back. I used to get 20 mpg at those speeds. It was fun to go 390 miles on one tank (with 4 gallons to spare).
In the last two hours of the return trip in heavier traffic the torque converter started to shudder (trans flushed with mobil 1 syn 3 months ago), so will try 1/2 a bottle of lubeguard red and see if that helps. It may be time to retire the Q from roadtrip duty, too much heat on the trans I think (which is probably original trans).