Answer to "Can just unplugging the lower wire eliminate the egr?"Could someone clarify this procedure a little, as I'm just getting educated about an ISX, and EGR. Do we want to unplug a wiring connector at the solenoid? (looks kind of like an electric motor on the bottom of the EGR valve). I've already had to replace the EGR valve, as I've only had the truck a few weeks, (06 IH), and EGR valve stuck open, (was in open position when removed). Now I'd like to get my $900.00 back by unplugging it and getting better fuel mileage, if it truly works. If I had it to do over I would had kept the old valve just to see what it was made of, and to keep them from "rebuilding" it for say less than a hundred bucks, and charging the next guy $900. again.
Answer to "Doesn't someone have a spreadsheet?"I can't answer your question, but it is a timely topic of discussion for me as I have been trying to find the RR of a Goodyear G572 drive tire. I need to find out asap, as a truck I just puchased has four new ones on the front drive axle, and four michelins that are about 50% on the rear drive axle. If the 572 is a good tire with regard to RR it would make sense to put 4 more on, but if there are better choices, I could see if I could do some trading toward 8 of another tire. All I've been able to find out so far is that the G572 cost is $600. to $645. each, and the goodyear site compares them to another goodyear tire, and claims that the 572 has 91% as much RR as the other GY tire, basically telling me nothing useful. Thanks for your time.