With a better spray pattern I don't know how much it would help, but there was a thread about adding Acetone to the gas. 1fl.oz. / 5gal gas. It helped a lot with part-throttle response in mine - but I have a lead foot, so I only get around 13-15MPG, depending how many people I find to race
O2 sensors are supposed to be good for 100K+ miles, and I think they either work or they don't, no in-between - could be wrong.
Do a search for a "hyper ground kit" on google. My friend showed me one (I think it's called "hyper ground", again, not sure) - it basically upgrades the grounds for better performance by everything. The web site said 13HP and several MPG on a stock Evo 8 - my friend said he heard about them from somebody who never would have believed the improvement he got until he felt it himself, as did my friend, who said the same. The next $100+ disposable income I get goes to one of the generic kits they have.
Also you may want to replace all your wires with higher-guage (less resistance - same principle as the ground kit). 5-90 makes them, so does some guy
[email protected] - could be the same guy, I think they're both in San Jose, CA.
My Jeep is a screamer from 3k-redline, still has some nut down low, but low-restriction intake and exhaust (Borla cat-back and drilled out the honeycomb from my Cat
, and home-made K&N) and a shorter-than-stock intake really doesn't help low-end too much, which is where you are when driving, which means that's how you get your good mileage. You can get aTB spacer to help lengthen the intake and bring the torque band down a little.
You can manually shift the tranny. Jeeps stay in higher gears when lower gears would be MUCH more suited to the conditions, ie, climbing a hill @40MPH in 4th, when the same throttle position on the same hill in 2nd would have you going 55MPH. This could be due to my mods too, and the computer not knowing how much more torque it would have if it would downshift.
Upgrade the ignition with MSD/comparable unit, high-voltage coil, etc. Dunno how easy it would be to swap a coil-on-plug from 00+ 4.0 into yours. Probably not easy.
If you changed your t-stat to something other than stock (195*F), change back to stock. Less coolant circulating = less parasitic loss.
Run synthetics in everything but your AW4 - I hear they don't like synthetics or additives too much.
Ummm........yeah........stay with 87 octane/regular unleaded unless your motor knocks......scrape your battery terminals clean, and the connectors......the oxidation I heard is the same color as the lead, so just give them a good wire brushing.
Sorry, I didn't expect to say so much
