juice box for the 4.0L fuel injected motor

[kbest]

I'm thinking of using the same concept of the juice box on a 258 to the 242 I6 on my 89 jeep cherokee. The motor is fuel injected but is slow to start and at higher speeds runs a little rough also the idle is a little lacking. So I got the bright idea of using a larger distributor, new rotor button, wires and plugs like the juice box. I'm hoping it will work on the same concept and suggestions or advice before I do it.

[TerryMason]

I've done the TFI or juice box upgrade on several cj/yj 258s (see the write up here), and I think the main reason that you would want to use a larger cap and rotor (on the 25 is that the cap the factory used was too small, and caused problems. Your Cherokee probably doesn't have this problem as it uses a different distributor.

The juice box gets most of it's power from the new plug wires and coil. I would recommend that before you spend the time trying to discover new parts that fit, you get a new set of wires and a coil from someone like Accel or MSD.

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Terry Mason:

'85 CJ-7 - 33s, total of 4.5" lift, TFI ignition, plus more. Click here to see it

check the crank sensor- when the gap gets wide on these the crank time is real long. Jeep has updated the part

<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE><font face="Verdana, Arial" size="2[/IMG]Originally posted by kbest:
I'm thinking of using the same concept of the juice box on a 258 to the 242 I6 on my 89 jeep cherokee. The motor is fuel injected but is slow to start and at higher speeds runs a little rough also the idle is a little lacking. So I got the bright idea of using a larger distributor, new rotor button, wires and plugs like the juice box. I'm hoping it will work on the same concept and suggestions or advice before I do it.</font></BLOCKQUOTE></FONT></TD></TR><TR><TD><HR></TD></TR></TABLE>

	Crank position sensor A crank sensor is a component used in an internal combustion engine to monitor the position or rotational speed of the crankshaft. This information is used by engine management systems to control ignition system timing and other engine parameters. Before electronic crank sensors were available, the distributor would have to be manually adjusted to a timing mark on the engine.