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Unread 10-09-2012, 10:56 AM   #1
infinitempg
Registered User
2009 XJ Cherokee 
 
Join Date: Aug 2006
Location: Bradenton, Florida
Posts: 45
Kick in da Pants for an '09 3.7L 2WD!

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

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Unread 10-09-2012, 11:08 AM   #2
oducks12
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2005 WK 
 
Join Date: Feb 2012
Location: Boulder, Colorado
Posts: 353
I have the Hypertech programmer and havent had a single problem. I'd say it is definitely the best bang for the buck. You can also put headers on it, a full exhaust system, re-gear for better acceleration...it all depends on how much $$ you want to put in it.
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[COLOR="DarkGreen"][SIZE="1"][CENTER]Silver WK Club Member #35 | 2005 WK 3.7 Laredo | Hypertech 52001 programmer | K&N Intake | Magnaflow 50 series muffler | Navigation | Rola rack | 2 Hella 500ff's behind grill | 2 KC Daylighters on roof | ARB on board air compressor | 265 70 17 Goodyear Wrangler Duratrac's | Pinch weld and rear fender trim | Spidertrax 1.5" spacers | expanded metal grill | LED stack lights | Monroe LL shocks | Bilstein HD struts | Rough Country 2" lift | Kenwood amp w/ two Alpine type R 10" subs[/CENTER][/SIZE][/COLOR]

[CENTER][SIZE="2"]See How It Was Made [URL="http://www.jeepforum.com/forum/f67/oducks-build-thread-1385731/"][B][COLOR="Black"]HERE[/COLOR][/B][/URL][/SIZE][/CENTER]
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Unread 10-09-2012, 11:41 AM   #3
infinitempg
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2009 XJ Cherokee 
 
Join Date: Aug 2006
Location: Bradenton, Florida
Posts: 45
Quote:
Originally Posted by oducks12 View Post
I have the Hypertech programmer and havent had a single problem. I'd say it is definitely the best bang for the buck. You can also put headers on it, a full exhaust system, re-gear for better acceleration...it all depends on how much $$ you want to put in it.
Do you have the 52501? How difficult was it to install and setup? How much improvement did you see to tranny shifting, response and mileage? Hate to pry but.... well, no I don't

Not running down the headers/exhaust street, last time I did that was on a 350 small block and the only you could call "electronics" in that beast was an 8-track
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