Been diggin' around and getting mixed messages so thought I'd just cut to the chase and pull all the strings together. Got a low mileage clean 2009 Jeep Grand Cherokee Laredo 3.7L 2WD and really like it except for the somewhat flat performance, lax acceleration at times, quirky idle (sometimes RPM drops like a rock when idle for a while) and less then stellar gas mileage. Been burning up the web and found a lot of confusing stuff....
Heard that mod chips like the Jet 90901 or Hypertech 52501, will increase performance, good changes to tranny shift points, response and gas mileage. Then I find first hand users saying that it didn't do squat or very little, or horror stories of creating engine knocks, transmission shifting issues, and other issues that don't go away when it's removed.
Then stumbled across the cold air intake kits that increase horsepower and gas mileage. Then I dig deeper and find that mileage and performance improvements are minimal, the filters clog quick or don't filter well and debris gets sucked in screwing stuff up, or requires cutting and altering things under the hood to truly get cold air intake.
So the question is, is there really anything that can be done to help improve performance and gas mileage with the stock 3.7L 2WD without risking major mechanical issues???
Any and all opinions, suggestions and advice gladly welcome