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Unread 04-30-2013, 12:41 AM   #1
Fresh_prince101
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Does anyone know if its possible for this swap

Can i use a pcm from the 96-98 zj on a 93zj

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Unread 04-30-2013, 01:47 AM   #2
kensnelling
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No, the JTEC is a total different design.

Ken
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Unread 04-30-2013, 02:18 AM   #3
Fresh_prince101
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Thanks. An do you think by me changing the pcm it would also fix my voltage problem also because my zj runs on low volts.
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Unread 04-30-2013, 02:19 AM   #4
Fresh_prince101
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I have had the alternator tested it came back good
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Unread 04-30-2013, 02:52 AM   #5
kensnelling
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It might correct the problem. Other possible problems could be corroded battery cables, dirty grounds, weak battery, etc. First step is to do a vehicle charging system check, and a battery load test. The PCM's internal voltage regulator is not the usual cause of a charging system problem.

I've seen the test machines at the auto parts stores for off the vehicle alternators and starters pass defective units and fail good units.

Ken
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Unread 04-30-2013, 01:14 PM   #6
Fresh_prince101
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Ok so im hearing that there is a specific pcm i have to find if i went to a junk yard to get one. How do i know what's right or not?
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Unread 04-30-2013, 01:42 PM   #7
Fresh_prince101
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i heard i have to have a certain pcm for my 93 zj

How do i know what pcm is right for my truck an whats not
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Unread 04-30-2013, 02:05 PM   #8
ratmonkey
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match the part numbers on the pcm. or find a zj with the exact same options and trim level as yours.
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'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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Unread 04-30-2013, 02:15 PM   #9
Fresh_prince101
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Does it matter about the year of the zj
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Unread 04-30-2013, 03:32 PM   #10
ratmonkey
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yes
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'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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Unread 04-30-2013, 03:45 PM   #11
Fresh_prince101
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So what years should be right
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Unread 04-30-2013, 03:47 PM   #12
ratmonkey
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93.
94-95 are slightly different.
96-98 are completely different.
engine type and factory security equipment matter.
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'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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Unread 04-30-2013, 04:19 PM   #13
Fresh_prince101
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Could i use the 94-95
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Unread 04-30-2013, 08:55 PM   #14
kensnelling
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No, you'll need the same year that you have, in this case a 1993. As ratmonkey already explained, if you're getting one from the auto salvage you'll need to find one with the same part number as is on the label on yours. You need one with the same engine as you have, and whether or not your ZJ and the donor ZJ have security is very important. You can't mix those.

Ken
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Unread 05-02-2013, 12:16 PM   #15
Fresh_prince101
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Ok should be my last question does the number have to be exactly the same cause i found some ata junk yard just the last 3 numbers are different
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