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Custom ecu???

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Old Oct 8, 2009 | 05:02 AM
  #1  
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From: Nashville, TN
Default Custom ecu???

where can i get one so i can run a (nearly)unrestricted exhaust and short intake without killing my engine?
or can i just flash my ecu?

any ideas?
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Old Oct 8, 2009 | 05:18 AM
  #2  
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what do you mean by short intake? Do you have smog or state inspections there? You really can't just tweak these ecus to whatever you want. no obd I stuff here.
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Old Oct 8, 2009 | 06:39 AM
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i used to work with some guys that were into the tuner cars and they told me you can get a stand alone computer for just about any motor. gets complicated in a hurry but sounds interesting as you have more control and it can be tuned for your elevation to get perfect fuel to air ratio's. depending on motor size you can acheive 20-80hp
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Old Oct 8, 2009 | 01:46 PM
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Originally Posted by JEEP THRILLS
i used to work with some guys that were into the tuner cars and they told me you can get a stand alone computer for just about any motor. gets complicated in a hurry but sounds interesting as you have more control and it can be tuned for your elevation to get perfect fuel to air ratio's. depending on motor size you can acheive 20-80hp
intersting .. anyone has more idea about it ?
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Old Oct 8, 2009 | 02:53 PM
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Here is an Open Source ECU tool. .romraider.com/RomRaider/Download"]http://www.romraider.com/RomRaider/Download[/URL] I don't know if it will work for our JK's. Beyond my current knowledge.

Last edited by mkjeep; Oct 8, 2009 at 07:48 PM. Reason: no clickys
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Old Oct 8, 2009 | 02:54 PM
  #6  
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Originally Posted by rfrogman
Here is an Open Source ECU tool. [.romraider.com/RomRaider/Download"]h.romraider.com/RomRaider/Download[/URL] I don't know if it will work for our JK's. Beyond my current knowledge.

Oops only works for Subaru's. I'll keep searching.

Last edited by mkjeep; Oct 8, 2009 at 07:48 PM.
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Old Oct 8, 2009 | 03:49 PM
  #7  
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The problem with a total replacement ECU, is that the JK's ECU handles EVERYTHING in the Jeep, even the radio will not work without authorization from the ECU. Head lights, foglights, wipers, signals, A/C, lockers, etc. all require the ECU to function.

Most of the standalone ECUs are made to handle engine functions only. I'm not sure how they would handle the electronic throttle either.

By the time you had a complete ECU programmed to handle all of the non-engine functions, you could have bought a hemi.
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Old Oct 8, 2009 | 07:45 PM
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Check out BG Performance PCM (dot) com. they do custom Jeep tunes (JK included). $350 + shipping IIRC. I know their KJ tune is excellent!
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Old Oct 8, 2009 | 08:08 PM
  #9  
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Originally Posted by guruman
The problem with a total replacement ECU, is that the JK's ECU handles EVERYTHING in the Jeep, even the radio will not work without authorization from the ECU. Head lights, foglights, wipers, signals, A/C, lockers, etc. all require the ECU to function.

Most of the standalone ECUs are made to handle engine functions only. I'm not sure how they would handle the electronic throttle either.

By the time you had a complete ECU programmed to handle all of the non-engine functions, you could have bought a hemi.
Yep, don't plan on any more power with a "stand alone". Not ITB's either like the ricers or euros. I think you are over estimating the capability of the 3.8L, it is certainly not limited by its electronics. Tuner will help with throttle delay and a little more umph. There is no "vtec" that you can alter, straight timing chain.. That's as good as you'll get. Map sensor automatically will know your elevation and tune accordingly. It's not going to run the same fuel maps at sealevel as it will 12000ft.

Your engine control module is very intwined with the rest of the vehicle electronics. This is no 90's honda that you can just up and mess with..Multiple bus systems will have your head spinning with "no gain" in most people's opinions.
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Old Oct 8, 2009 | 08:29 PM
  #10  
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Originally Posted by daspes
Check out BG Performance PCM (dot) com. they do custom Jeep tunes (JK included). $350 + shipping IIRC. I know their KJ tune is excellent!
Seems like there's not much gain with the BG Perf. setup either.


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This PCM upgrade is designed for stock vehicles or vehicles with some modifications (mild cam, cold air, headers)

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