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Prior to changing plugs


 
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Flipper
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Joined: 08 Apr 2004
Location: Virginia Beach, Virginia

PostPosted: Tue Apr 27, 2004 4:22 pm    Post subject: Prior to changing plugs Reply with quote

shock Should the battery be disconnected prior to installing new plugs.?
Thought someone said ,this would allow the computer to adjust..,or maybe I'm reading wrong!!,.Thank You for any and all replies.. Cool
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Black2001TJ
Leopard Skin
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Joined: 03 Jan 2004

PostPosted: Tue Apr 27, 2004 5:46 pm    Post subject: Re: Prior to changing plugs Reply with quote

Flipper wrote:
shock Should the battery be disconnected prior to installing new plugs.?
Thought someone said ,this would allow the computer to adjust..,or maybe I'm reading wrong!!,.Thank You for any and all replies.. Cool


Yes, you should disconnect the negative terminal on the battery, then change the plugs, then reconnect.. Check out the writeups/reviews section for a great writeup on changing plugs.. Good luck!
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ehirner
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Joined: 01 Jan 2004
Location: Eastern PA

PostPosted: Tue Apr 27, 2004 6:10 pm    Post subject: Reply with quote

I never do. But that's b/c I'm lazy and don't want to disconnect, reconnect, and then reset all my radio stations and the clock.
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WhatWasIThinkin
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Joined: 02 Jan 2004
Location: Epping New Hampsha

PostPosted: Tue Apr 27, 2004 6:24 pm    Post subject: Reply with quote

I never do that, whats the point. The ecu/cpu dont care that you'vve made a plug change. Resetting the flash for plug changes would make as much sence as resetting after an oil change.

Now....resetting the flash a couple times a year is supposed to help make the epu run at its best all the time. If have been told that by DC engine techs. I was also told that it should be done after any major engine modifications, either machined mods or bolt ons. It takes the epu @ 200 miles to re-learn its engine.
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woodsytc
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Joined: 21 May 2004

PostPosted: Fri May 21, 2004 8:14 am    Post subject: Reply with quote

does this "EPU" appear on the 2.5L 4cylinder engine too? Confused
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YellowX
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Joined: 06 Jan 2004
Location: Weare, NH

PostPosted: Fri May 21, 2004 8:45 am    Post subject: Reply with quote

Just added on an FIPK and TBS, left the TJ "unplugged" for the night. Reattached the cable this morning and off to work I went. Force the little bugger to figure out what I just did. muw-hah-hah-hah
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Code3TJ
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Joined: 01 Jan 2004
Location: Uzbekistan

PostPosted: Fri May 21, 2004 9:48 am    Post subject: Reply with quote

woodsytc wrote:
does this "EPU" appear on the 2.5L 4cylinder engine too? Confused

If it's a TJ, then yes, it's the computer right above the battery or thereabouts on the firewall.
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KnightFire
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Joined: 07 Jan 2004
Location: Hanover, MD

PostPosted: Fri May 21, 2004 1:49 pm    Post subject: Reply with quote

There is nothing the computer needs to learn about having new plugs, whomever said that you needed to reset the PCM was mis-informed.
The PCM simply supplies the 12V for the coil, the coil packs do the rest.


KnightFire
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capndave
Member


Joined: 15 Jul 2005

PostPosted: Mon Jul 18, 2005 3:46 pm    Post subject: Reply with quote

Take 2 seconds to disconnect the battery. If you hit that alternator wire
with your wrench you'll get a nice little jolt (and probably arc weld the
wrench to the altnernator).
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IBTJn
Moderator
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Joined: 31 Dec 2004
Location: Just Outside of Portland, OR

PostPosted: Tue Jul 19, 2005 3:20 pm    Post subject: Reply with quote

ehirner wrote:
I never do. But that's b/c I'm lazy...

Dang I love honesty! rofl I'm lazy, too. I don't disconnect the battery either.

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