4.0 throttlebody on a 2.5 - Pirate4x4.Com : 4x4 and Off-Road Forum

DazJeep · 04-13-2009, 08:08 PM

Installed a 4.0 throttlebody and throttlebody spacer on my 2.5. I've noticed a power gain when the MAP sensor isn't messing up. A few questions. First the throttlebody didn't have a spot for the MAP sensor so I moved it to a spot on the intake just under the throttlebody. Will this effect it? Next can I still use my 2.5 MAP sensor or do I need one off a 4.0? I also run a cold air intake if that makes any difference.
Thanks for any help in advance.

Why J? · 04-14-2009, 07:05 AM

This should be good. I love Tuesday.

Tj_Justin · 04-14-2009, 07:19 AM

Quote:

Originally Posted by DazJeep

Installed a 4.0 throttlebody and throttlebody spacer on my 2.5. I've noticed a power gain when the MAP sensor isn't messing up. A few questions. First the throttlebody didn't have a spot for the MAP sensor so I moved it to a spot on the intake just under the throttlebody. Will this effect it? Next can I still use my 2.5 MAP sensor or do I need one off a 4.0? I also run a cold air intake if that makes any difference.
Thanks for any help in advance.

Nope... wont work... Its umpossible, impractical

Search noob

and get outta hardcore

DazJeep · 04-14-2009, 10:48 AM

Quote:

Originally Posted by Tj_Justin

Nope... wont work... Its umpossible, impractical

Search noob

and get outta hardcore

Why will this not work? I've moved the MAP Sensor and it's working alittle better. I still got to work out the bugs.

What just because it's a 4cyl it's not allowed in hardcore. It don't take alot of HP to get throught the tough stuff. My last 7 jeeps were V8's and 6cyl. And I like the light weight of the 4 banger. It sucks to drive on the road but that don't happen much anyway considering it's not legal. I'm just trying to get alittle more low end.

Tj_Justin · 04-14-2009, 11:45 AM

Quote:

Originally Posted by DazJeep

Why will this not work? I've moved the MAP Sensor and it's working alittle better. I still got to work out the bugs.

What just because it's a 4cyl it's not allowed in hardcore. It don't take alot of HP to get throught the tough stuff. My last 7 jeeps were V8's and 6cyl. And I like the light weight of the 4 banger. It sucks to drive on the road but that don't happen much anyway considering it's not legal. I'm just trying to get alittle more low end.

It wont work because your ability to locate the non-hardcore section fails... try jeepforum for someone to answer your question that has been answered thousands of times already.

Toolbox · 04-14-2009, 08:10 PM

you need a MAP sensor calibrated for your 4.0l t/body and CAI...

Mach2_nh · 04-14-2009, 08:16 PM

I dont think even that will make the system work right.

kb1jkn · 04-14-2009, 09:43 PM

http://www.jeepforum.com/forum/showthread.php?t=602123

danielgoforth · 04-15-2009, 10:50 AM

Quote:

Originally Posted by Tj_Justin

try jeepforum for someone to answer your question that has been answered thousands of times already.

No, please don't

.

If you want more low end, get gears. Throttle body spacers are gay.

DazJeep · 04-15-2009, 11:08 AM

Thanks Toolbox. I'll try that.

DazJeep · 04-15-2009, 11:11 AM

I'm giong with 4:88s And I had the TB spacer laying around so I thought I'd put it on there while it was apart.

Toolbox · 04-15-2009, 01:52 PM

Quote:

Originally Posted by DazJeep

Thanks Toolbox. I'll try that.

I was fukkenwitcha dumbass.... Where the F did you "move" the MAP to?

Dookey · 04-15-2009, 04:26 PM

If you want more power you need to add the 4.0 air intake box and tube. I have one for sale. PM me for details.

DazJeep · 04-15-2009, 07:49 PM

Quote:

Originally Posted by Toolbox

I was fukkenwitcha dumbass.... Where the F did you "move" the MAP to?

Hooked it into a vacumn port right under the throttle body. Right now I got it idleing good and not cutting out any more. Most of the time it runs good with a noticable power difference. but every now and then it doggs down for a few seconds. The throttle body came off and older 4.0 about a 95 model. I used the Throttle Position Sensor and MAP Sensor(which I relocated) off the 2.5. But since the Idle Air Control was bad i used the one of the 4.0. I'm starting to thinc I need to use all of one or the other.

aucoinj4 · 04-15-2009, 08:06 PM

I did this to my old jeep, tps is the same for the 4.0 and 2.5, but the IAC motor and housing are different. they either have 4.0 or 2.5 stamped on them, you need one that says 2.5. I found this mod makes no diference in power, money is better spent elsewere. Gears made a much better diference

danielgoforth · 04-16-2009, 10:06 AM

Quote:

Originally Posted by DazJeep

Right now I got it idleing good and not cutting out any more. Most of the time it runs good with a noticable power difference. but every now and then it doggs down for a few seconds.

Butt dyno tested? If it cuts out and dogs down I really don't see why the hell you did it.

04-13-2009, 08:08 PM	#1 (permalink)
DazJeep Registered User Join Date: Mar 2009 Member # 132093 Posts: 39	4.0 throttlebody on a 2.5 Installed a 4.0 throttlebody and throttlebody spacer on my 2.5. I've noticed a power gain when the MAP sensor isn't messing up. A few questions. First the throttlebody didn't have a spot for the MAP sensor so I moved it to a spot on the intake just under the throttlebody. Will this effect it? Next can I still use my 2.5 MAP sensor or do I need one off a 4.0? I also run a cold air intake if that makes any difference. Thanks for any help in advance.

04-14-2009, 08:10 PM	#6 (permalink)
Toolbox Registered User Join Date: Jan 2005 Member # 41802 Location: York,SC Posts: 187	you need a MAP sensor calibrated for your 4.0l t/body and CAI... __________________ Calling an illegal alien an 'undocumented immigrant' is like calling a drug dealer an 'unlicensed pharmacist' -

04-15-2009, 11:08 AM	#10 (permalink)
DazJeep Registered User Join Date: Mar 2009 Member # 132093 Posts: 39	Thanks Toolbox. I'll try that. Last edited by DazJeep; 04-15-2009 at 11:09 AM.

04-15-2009, 04:26 PM	#13 (permalink)
Dookey GM at TWF Join Date: Oct 2003 Member # 23680 Location: Wichita, KS Posts: 7,259 Blog Entries: 1	If you want more power you need to add the 4.0 air intake box and tube. I have one for sale. PM me for details. __________________ ANDY<--- ME! TrailWorthyFab.com<--- THE BEST DOUBLE BEAD LOCKS! Project: Dookey's revenge<--- My Junk! OFF ROAD GEAR<--COOL SWAG!

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04-14-2009, 07:05 AM	#2 (permalink)
Why J? Registered User Join Date: Apr 2006 Member # 71834 Location: Knoxville, TN. Posts: 206	This should be good. I love Tuesday.

04-14-2009, 08:16 PM	#7 (permalink)
Mach2_nh Registered User Join Date: Jun 2005 Member # 49116 Location: Weare NH Posts: 357	I dont think even that will make the system work right.

04-14-2009, 09:43 PM	#8 (permalink)
kb1jkn Trailside mechanic Join Date: Mar 2007 Member # 88359 Location: Harwinton Ct Posts: 145	http://www.jeepforum.com/forum/showthread.php?t=602123

04-15-2009, 11:11 AM	#11 (permalink)
DazJeep Registered User Join Date: Mar 2009 Member # 132093 Posts: 39	I'm giong with 4:88s And I had the TB spacer laying around so I thought I'd put it on there while it was apart.

04-15-2009, 08:06 PM	#15 (permalink)
aucoinj4 Registered User Join Date: Dec 2008 Member # 124778 Posts: 1	I did this to my old jeep, tps is the same for the 4.0 and 2.5, but the IAC motor and housing are different. they either have 4.0 or 2.5 stamped on them, you need one that says 2.5. I found this mod makes no diference in power, money is better spent elsewere. Gears made a much better diference