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Unread 03-26-2002, 04:28 PM   #1
jfarrell
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Join Date: Mar 2002
Location: Akron NY
Posts: 54
Intake Question

If I put a later model cone style K&N filter setup on my 90 YJ 2.5L with TBI will it cause it to run lean? Just wondering, looking for some more umh as all the 4 bangers are!

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Unread 03-26-2002, 05:22 PM   #2
Atropine
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2000 TJ Wrangler 
 
Join Date: Sep 2001
Location: Charleston, SC
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It shouldn't run lean it will get more air. If you need more umph for your 2.5L go here

<a href="http://homepage.mac.com/jyokomura/tech/throttlebody01/index.html" target="_blank">http://homepage.mac.com/jyokomura/tech/throttlebody01/index.html</a>

I have some 4.0 TB's here for sale, i'm asking $75 for them shipped.
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Unread 03-26-2002, 10:35 PM   #3
jfarrell
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Thanks for the response! My only concern is that it is a Throttle Body Injected engine and that the fuel injector is also inside of the throttle body. I know that 89 and 90's were made this way, changed to port injection in '91. I just wanted to make sure that this mod wouldn't cause the mixture to run off because of the fact that its getting more air. I know the fuel injector pulses in response to the position of the TPS that's why I was concerned that the engine might run in a lean condition. Has anyone done any mods with the TBI 4 bangers, anyone else curious? I wish that I would have found a 91, it would make this mod so much easier!
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Unread 03-27-2002, 10:25 AM   #4
Atropine
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I totally forgot about that the 90's have TBI (the 3 bolt as opposed to the 4 bolt ones on MPFI) The ones I have are all for MPFI...
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Unread 03-28-2002, 09:31 PM   #5
PoorFool
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Hey, I have a 4.0 liter TBI throttle body from an 87-90 Cherokee. I mistakenly bought it to put on my '94 not realizing there was a difference. It's just sitting on a shelf gathering dust. It doesn't have any sensors, and I'm not sure if the injector is the same but you could find out from a dealer. I just want at least some of my $$ back out of it. Find out if it will work then email me if you want it. I'll sell it for $20 plus shipping from 64114. I also get cheap shipping through work. Same goes for anyone else needing a TBI throttle body.

Thanks,
Tommy
tgraves01@msn.com
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Unread 03-29-2002, 10:22 AM   #6
Atropine
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Click the link on my sig for more 4 banger stuff!
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Unread 03-29-2002, 12:44 PM   #7
4wheeler4CJ
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The engine's computer should re-adjust when it senses more air intake, shouldn't it? I would say it will adjust the fuel to make the right mix. Shouldn't be a problem.
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