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Unread 02-11-2013, 09:50 AM   #1
crushedcan
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ECU removal question

This may be elementary but I am a rookie and I want to reassure myself. I have a rebuilt 258 with a weber 38. Also I installed a new centech wiring harness and a stock distributor, coil and motorcraft ignition box. I don't see any reason that I can't eliminate the ECU. Am I correct?

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Unread 02-11-2013, 10:11 AM   #2
vinnyabs
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You are correct. Search for how to do a 'Nutter bypass'. It is a simple way to directly wire the ignition together without input from the evil box. The write ups are very thorough and you will soon be getting more into your engine compartment than you thought. The end result when tuned right will amaze you and make you proud
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Unread 02-11-2013, 10:29 AM   #3
MoC
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When you installed the weber and new wiring harness did you wire the computer back in?
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Unread 02-11-2013, 10:36 AM   #4
crushedcan
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No I have not wired it back in. The way I am seeing it, the ECU can be removed from the jeep.
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Unread 02-11-2013, 10:40 AM   #5
Matt1981CJ7
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As Vinny said, removing the computer is a very common mod on later CJs. It's even got a name, the "Nutter Bypass".

A few searches will provide a butt-load of info on it.

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Unread 02-11-2013, 11:11 AM   #6
dslywalker
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Look for a post by Luckycheesehead
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Unread 02-11-2013, 11:33 AM   #7
keith460
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Yes, that's correct. Once the Weber is installed, no need for the ECU and all related wiring to it can be removed. It will really clean up the engine bay and not look so cluttered with all the extra wiring that is not needed.

After it is removed, you should have a pile that looks like what is pictured below.

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Unread 02-11-2013, 11:35 AM   #8
frhrwa
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you will also get rid of 10lbs of vacuum tubes and hookups.. really cleans it up.. don't forget to reset the timing immediately after the nutter bypass.. I think it was 8degrees..
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Unread 02-11-2013, 12:15 PM   #9
MoC
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Quote:
Originally Posted by crushedcan
No I have not wired it back in. The way I am seeing it, the ECU can be removed from the jeep.
If you did not wire it back in and have replaced the harness then no need to do the nutter bypass, since that involves removing it from the orignal harness.
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