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Old 06-28-2016, 10:00 AM
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Ecm please!!!

Older guy at work has a 1990 wrangler automatic trans with a 4.2l fuel injected motor. He needs an ecm and I'm trying to help him out.

Can only find manual transmission ones online.

Can any one help me out with a part number or location of a part.

Please and thank you.

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Old 06-29-2016, 03:41 PM
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Re: Ecm please!!!

Quite a few on eBay, you'll just have to pick through them.

Jeep Wrangler YJ 1990 4 2 6 CYLINDER AUTOMATIC COMPUTER ECM 334 | eBay
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Old 06-30-2016, 04:39 AM
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Re: Ecm please!!!

He talked to a 4 wheel shop yesterday and apparently it's allot more complicated than he or I knew to change it over to fuel injection.

Thank you very much
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Old 06-30-2016, 08:51 AM
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Originally Posted by DCR06 View Post
He talked to a 4 wheel shop yesterday and apparently it's allot more complicated than he or I knew to change it over to fuel injection.

Thank you very much
Wait. Doesn't he already have a FI 4.2? Why then would it be difficult to swap it over if all it needs is a pcm? All it may need is the factory calibration swapped to the "new" pcm
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