fixitman

what can i do to get more power out of my 99 xj 4.0? i know there is alot of mods out there but what actually works and adds noticeable power??

p.s i have aw4 auto tranny, 3.55 gears, 31's, everything is stock besides suspension. shes got no *****!!!

a1racer

have you done any basic maintenance to it like plugs coil cap change the air filter. my 2000 has good get up with 33's and stock gearing i just lost some top end. and if you go to a 4.10 gear ratio it will give you some scoot back

fixitman

nope i should probably try that huh? lol

jd4x426

do a tune up put on an exhaust and a better air filter that should help some

mobilecherokee4

yep! and bore the throttle body out.........then put a stroker in haha

RedBaron

Cool your jets gentlemen. How about a compression test to see if the engine is healthy before we start on the Viagra.

TrekkerJmm

Well you can always get the "Hangin *****" from the trailer hitch...lol J/K but seriously check your compression and try a tuneup as suggested in earlier posts then check out this link...Tj
http://www.strokedjeep.com/index.html

tampaviking

Just drive an old renix for a week then go back to your Jeep.

benennis

im running 35's and stock gears, it does alright but, no top end whatsoever

98 JeepJeep

regear with 4.56 because your gonna get tired of the 31's and you will be perfect with 33's

CrawlnCoupe

nothing a 10# bottle and a 150 shot couldnt take care of.

98 JeepJeep

KABOOM!!!!!!!!

Destro

My 4.0 really wakes me up in the morning- granted my wheelin' rig for the last couple years until I got the XJ was an '84 4-Runner. Talk about no BawlZ- that sucker can hardly get out of it's own way. With the 31's on it 60MPH is top end on the expressway, and it takes about a week to get that fast! In 4-low it will crawl over lots of stuff but getting to the trails (or anywhere else) was no fun at all.

:-)

CrawlnCoupe

i guess i have no problems with my truck acceleration wise. i understand its a offroad rig and its not supposed to do 15 sec passes in the quarter. i have 31's no lift and a stock 97 engine and stock gears, but if i wanna do 70 down the highway it'll do it, and it works great in low range. i think the biggest thing for you is to have the regear done. on the other hand, my old 5 spd 89 comanche with stock gears would have problems climbing slight inclines with i had it in overdrive.

redhandstudios

...ouch! Mine will still lay rubber in the first three gears. (178K miles on her.)