Stumbling from idle to about 2900? -
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Unread 05-11-2010, 09:36 AM   #1
Registered User
1989 XJ Cherokee 
Join Date: Sep 2006
Location: Carmel, NY
Posts: 166
Stumbling from idle to about 2900?


I did a few mods now I am stumbling from idle to about 2900rpm. Its not terribly slow but you can feel/hear it has a small stumble, like if it may be lean, until 2900 and then it pulls all the way up. Just looking to see if anyone here has any ideas.

Rig: 89 XJ
Rebuilt motor about 60k on it (Renix FI and Renix Head)
Borla header heat wraped
2.5" cat/catback
99+ intake manifold
Injectors from a 98
Fuel pressure right now 57psi trying to make up for lean condition
Taurus fan swap
Map adjuster set to 5.56 volts
Homebrew CAI w/relocated IAT sensor


For Sale: 89' Limited w/ Renix. Performance:Custom Cold Air Intake, Air Temp Conversion, Map Adjuster, Throttle Body Conversion Bored, 99+ intake manifold, 98 injectors w/ 99 fuel rail, bumped fuel pressure, Borla Wrapped Header, 2.5 in exhaust header back, open loop cooling, electric fan conversion, SS brake lines, 96+ brake booster and still getting 20 mpg highway
For sale link
GrayBomb is offline   Reply With Quote Quick reply to this message
Unread 05-11-2010, 09:47 AM   #2
Registered User
1995 XJ Cherokee 
Join Date: Dec 2009
Location: Cranston, RI
Posts: 126
How long has it been since the fuel filter has been replaced? Hopefully it's something as simple as that.
93 XJ :Rusty's 3" w/ 31x11.5 swampers-hooked my brother up
96 XJ :Rusty's intake/exhaust kit-hooked my dad up
00 WJ :clear lenses from an 04-wife's DD
95 XJ :2dr slowly coming along!
irishgobrah is offline   Reply With Quote Quick reply to this message

cherokee , lean , performance , renix , stumble

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