Performance
Hello guys i have a jeep cherokee 2001 4.0 with 62mm throttle body hypertech programmed 91 tune injen intake and 3" tip exhaust , in my city we are like 115f im looking to relocate iat sensor(heard was great in hot weather) and im getting 12 mpg on 245/75R16 i may have lean combustion but i want to know what great mods can i do
Really oh man thanks actually im thinking in relocate the iat sensor upgrade to elec fans and upgrade injectors my jeep runs well but i have the 3.55 gears and i want my jeep to shift faster cause in 1-2 top end gear im going 70 mph and i dont want to go stroker i just want to spend to much
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Upgrade the rest of the exhaust, high flow main cat and muffler, larger diameter pipe. That 3" tip is doing nothing but making noise. Pair it up with a cowl intake to get nice fresh outside air, not stinky hot engine bay air. Your bored TB will really wake up once you have done these two things.
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Thanks @salad thats the only true and yes i will upgrade the rest of the exhaust system and buy the magnaflow high flow inline catalytic converters i will do the iat relocation and may upgrade injectors i will notice the forum any benefit i got
CF Veteran
Joined: Nov 2011
Posts: 2,433
Likes: 6
From: Northern MN
Year: 1990
Model: Cherokee (XJ)
Engine: Renix 4.0
There are quite a few guys on here who run them and have no issues, so why spend twice as much on a Mag? Plus there's a 5% CF discount code (cherokeeforum)
CF Veteran
Joined: Nov 2011
Posts: 2,433
Likes: 6
From: Northern MN
Year: 1990
Model: Cherokee (XJ)
Engine: Renix 4.0
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4WD4EVER
Modified XJ Cherokee Tech
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Jul 28, 2023 07:12 PM
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