whowey Posted November 14, 2009 Share Posted November 14, 2009 http://chicago.craigslist.org/wcl/pts/1464403855.html ALMOST everything you need.... Just need a few more parts to swap it on... ;) Link to comment Share on other sites More sharing options...
1990 Pioneer 4x4 Posted November 14, 2009 Share Posted November 14, 2009 ummm,... 4.2L :huh???: Link to comment Share on other sites More sharing options...
Eagle Posted November 14, 2009 Share Posted November 14, 2009 Yes, 4.2L. Jeep used to sell (and may still sell) a conversion setup to turn the carbureted 4.2L Wranglers into MPFI fuel injected vehicles. The kit was basically the manifold, engine room wiring harness, and injection setup from a 1994 Wrangler, with a special adapted to mount the CPS to the front of the engine to read off a special harmonic balancer that has trigger teeth on it. The price for this is a bargain -- if you have a 4.2L Wranger. The kit from Chrysler was $1500 or $2000 IIRC. Link to comment Share on other sites More sharing options...
1990 Pioneer 4x4 Posted November 14, 2009 Share Posted November 14, 2009 Thanks Eagle, you make understanding so much easier :thumbsup: Link to comment Share on other sites More sharing options...
Lenard Posted November 15, 2009 Share Posted November 15, 2009 Yes, 4.2L. Jeep used to sell (and may still sell) a conversion setup to turn the carbureted 4.2L Wranglers into MPFI fuel injected vehicles. The kit was basically the manifold, engine room wiring harness, and injection setup from a 1994 Wrangler, with a special adapted to mount the CPS to the front of the engine to read off a special harmonic balancer that has trigger teeth on it. The price for this is a bargain -- if you have a 4.2L Wranger. The kit from Chrysler was $1500 or $2000 IIRC. i assume the 4.2 was a straight 6? was it better that the 4.0? Link to comment Share on other sites More sharing options...
Geonovast Posted November 15, 2009 Share Posted November 15, 2009 The 4.2 is a previous version of the 4.0. It's the same block. It used a longer stroke crank, and a much smaller bore. The 4.2(258cui) crankshaft is what you use to stroke a 4.0 to 4.5, and depending on how much you bore it out, you can possibly get all the way up to 5.0, but it's not a good idea. 4.6L-4.7L is a good size. Link to comment Share on other sites More sharing options...
Eagle Posted November 15, 2009 Share Posted November 15, 2009 It was designated "4.2 Liter" in the YJ Wrangler, but back in earlier AMC days (into the 1960s and up through the 70s, at least) it was the 258 c.i.d. (Cubic Inch Displacement) in-line six. Yes, the 4.2L is the engine the 4.0L was based on. It was a VERY good engine. Better than the 4.0L? Probably not. It's hard to compare them, because the 4.0L was introduced with MPFI and the 4.2L was never offered from the factory with any kind of fuel injection. With a smaller bore and longer stroke, it was a torque engine. Plenty of low end, but it didn't wind up real quick (you'd never mistake it for a V6), and trying to run it higher than 3,000 RPM was an exercise in self-deception. The connecting rods were longer and skinnier than the rods in the 4.0L. We had several of them in the family over the years. No problems. Link to comment Share on other sites More sharing options...
Lenard Posted November 15, 2009 Share Posted November 15, 2009 interesting... thanks Correy, Eagle :thumbsup: Link to comment Share on other sites More sharing options...
beaterjeep Posted November 16, 2009 Share Posted November 16, 2009 What else might be missing? Money for me to get it. Link to comment Share on other sites More sharing options...
pingpong Posted November 16, 2009 Share Posted November 16, 2009 It says it is missing the harness and comp. To me that is the most important part of the sysytem. To be honest you can find a wrecked 92 and newer xj to pull the fuel injection setup for around that price, and that would be the way I would go. That way you can also update your interior harness if you want. Link to comment Share on other sites More sharing options...
Eagle Posted November 16, 2009 Share Posted November 16, 2009 :agree: The conversion makes sense if you have a 4.2L engine, because you need the manifolds to bolt up to the older head design. For anyone with a 4.0L engine, buying this kit doesn't make a lot of sense. Link to comment Share on other sites More sharing options...
pingpong Posted November 16, 2009 Share Posted November 16, 2009 :agree: The conversion makes sense if you have a 4.2L engine, because you need the manifolds to bolt up to the older head design. For anyone with a 4.0L engine, buying this kit doesn't make a lot of sense. Even if you had a 4.2, it doesnt make sense. Especially since the later HO engines head flow better and is actually a popular swap onto the 4.2 block, suppose to be worth like 10 hp if i remember right. Link to comment Share on other sites More sharing options...
whowey Posted November 17, 2009 Author Share Posted November 17, 2009 The real moral of the story with this thread...... Keep me away from the keyboard when under the influence of flu medicine... I have absolutely no idea what the heck I even meant in the beginning.... Link to comment Share on other sites More sharing options...
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