MiNi Beast

Crankshaft Position Sensor The Hall Effect type crankshaft position sensor is mounted on transaxle bellhousing. The sensor reads slots (4 per cylinder) on flywheel/flex plate. The signal generated provides engine speed and crankshaft position information to PCM. The PCM uses this information to determine proper fuel injection and ignition timing. When a flywheel/flex plate slot passes the crankshaft position sensor magnet, output voltage of the Hall Effect sensor goes high (5 volts). When the metal between the slots is aligned with sensor, output voltage goes low (.3 volts). This high/low voltage signal is sent to PCM each time one of the slots passes the crankshaft position sensor. The PCM uses this information to determine when to energize the injectors for fuel delivery to the proper cylinders. Manifold Absolute Pressure (MAP) Sensor The MAP sensor is mounted on engine compartment firewall. The MAP sensor is used by PCM to calibrate amount of air/fuel mixture supplied to the engine. This sensor measures manifold absolute pressure. Ambient barometric pressure is also measured when ignition switch is first turned on, during engine cranking, and at wide open throttle. The MAP sensor transmits a low voltage signal (1.5-2.1 volts) at idle when manifold vacuum is high, and a higher voltage signal (3. 9-4.8 volts) during open throttle when manifold vacuum is low. Input voltage (from the PCM) to MAP sensor ranges from 4.8-5. 1 volts. Adjustments made as a result of this input will usually affect injector pulse width, ignition timing, idle speed and upshift indicator light. Manifold Air Temperature (MAT) Sensor The MAT sensor is located on intake manifold, with sensor element extending into the air stream. The sensor measures the temperature of air entering the intake manifold. This sensor provides an analog voltage signal to PCM. This signal is used to compensate for changes in air density due to temperature. The MAT sensor is a Negative Temperature Coefficient (NTC) thermistor-type sensor. Its internal resistance varies opposite with temperature. At cold temperatures, the resistance is high. As temperature increases, its resistance decreases.

How you test them????? Read my post, you know that picture there, tells you how :nuts:

http://members.cox.net/wilsond/Fixes/di ... CPSdetails

Tube doors!

Well went to a machine shop today to have the one 89 bearing sleeve turned down to the proper O.D., but we all had reservations on how well it would work, so we just decided to have a bronze bushing made up to the correct specs. Specs being... O.D.= 1.000in I.D.= .5934in And cost is less then $20.

So where are we on this whole MJ of the month sticky?

Reread my post. I have a 89 renix AX-15 going into a 93 H.O. XJ. On the 93 XJ the bushing O.D. is 1.0000in and the 89 Bushing/sleeve O.D. is 1.0546in. So need to take the 89 XJ Spacer sleeve around the bearing down, So shave .0546in off the O.D. of the sleeve in order for it to fit the 93 XJ block. As of 92, Jeep changed the size of pilot bearing. The other option my brother suggested was to have a brass sleeve made up to specs and call it a day.

...and use the KY Jelly with the "warming sensation"... :eek: :nuts: You mean like THIS?? Hope this gets past the censors :eek: :rotfl2: I'm reposting that.

cut fenders and leave the color flares alone.

Nice write up in the Do it your yourself forum... http://comancheclub.com/forums/viewtopic.php?t=7695

So is the full serve where they come out with rubber gloves and personally spread your cheeks?

What I didn't explain it good enough? Sorry!! :D

reread the thread!

1. Click Img---- 4. Preview post 5. Post when done editing

For sure but it's looking like I have to have one made up if not, but going to double check some places tomorrow if there open. Guy over on NAXJA did the same swap and had to have one made, so may have to do that. Here is same topic I posted over on NAXJA.. http://www.naxja.org/forum/showthread.php?t=955222

89 AX to a 93 XJ block I went to parts store and looked at an 73 CJ 304 4sp pilot bushing and it looked as if it was just a metal sleeve. Is that what I need? Or do I put the 89 bearing in the CJ sleeve?

yeah didn't work, don't see the bigger lift yet. :D

I'll do that just thought this was an simple swap deal, but of course not, now my jeep is sitting in my old man garage blocking in his jeep, first I heard of this pilot bearing issue. It was never mention in any topic that I've seen on doing a 2wd to 4wd conversion. But there will be once I'm done, being I'm doing a write up for it.

perreetty! :popcorn:

Nice link CW

I'll let you know if I find out something, or have to get one made. Reshearching all day for this crap, jeep is sitting with the tranny out and it blows. :headpop:

Alright have a 93 H.O. 2wd XJ with a Ax-15, pulled it out to put in a 89 Renix XJ Ax-15/231 for my 4wd conversion. However, never thought of an issue with the pilot bearing but I have a little one. The top one as shown is for an 89 Renix XJ, the bottom one is for a 93 H.O. XJ, the one I pulled out, however the one on top has the right I.D. but the O.D. is to big. The 89 Renix calls for a I.D.- .5934in O.D.- 1.0546in The 93 H.O. calls for a I.D.- .7500in O.D.- 1.000in So as you can see it is just a @$#% hair to big, so is there any options here or can I just not do this swap?

X2 on bushing info I'm in the same boat.

Alright can I not swap in a 89 tranny into a 93 then? I got the measurements for the bushings of both years and they are different so can I not do this swap then?

Ok it's from an 89 (Ax-15) and going into a 93. Alright can I not swap in a 89 tranny into a 93 then? I got the measurements for the bushings of both years and they are different so can I not do this swap then?