Need someone with obdii scanner/ help get her started

[Hypoid]

Jim previously posted:

[4x4JeePmaNthINg]

What do you all think of this P-R clunk:
https://youtu.be/ISuEyxziVvI

Kickdown adjusted, fluid topped. It's an audible clunk. Yesterday was a buzz before adding fluid and kickdown adjustment. Is this the trans trying to get fluid back in it?

[Jim]

4x4JeePmaNthINg previously posted:

[4x4JeePmaNthINg]

Yes foot on the brake, no rear drive shaft in, I'm going to push the t case lever all the way toward the front of the jeep and see if that's 2wd.

[4x4JeePmaNthINg]

I found 2wd and the output does spin. I did get that buzz again in R, while shifting from D-P.

[Jim]

I wonder if the buzz is the parking pawl trying to engage while the mechanism (output end) is still spinning.

If you don't have (either) driveshaft installed, the output ends of the transmission have nothing to stop them from rotating, aside from waiting in neutral for them to stop spinning, before going into park. It's similar to trying to slam into park when you're moving at 1 to 5 mph...

I think, if you had the full drive train installed - where the output couldn't free-wheel (foot on brake would cause trans output to be not-rotating) you might not be getting these noises.

(I should re-read the posts to see where the noises are happening)

[4x4JeePmaNthINg]

I'll give it a try jim, only missing the tail shaft. Easy enough to throw on and test on my weekend.

[Hypoid]

Hypoid previously posted:

[xaza]

Excellent write up Mike. Around 14" vacuum is what I get with my Jeep. I would also pull spark plugs again in a week and make sure they are staying clean and the cause has been resolved.

[Jim]

Thanks for the detail!

Hypoid previously posted:

[Hypoid]

Jim previously posted:

[4x4JeePmaNthINg]

Mike that code we saw we saw was p1391, it's showing again. Both ckps,cmps are about 1yr old Mopar parts. I believe we verified spark already so I'm a bit lost on what to check, except the distributor itself is the 220000 stock.

I had a new napa reman I chose not to use because the shaft play seemed the same as the stock.

Should I be looking elsewhere or is the distributor likely worn?

[4x4JeePmaNthINg]

Ok guys so p1391 CEL continues to come on, and I'm stuck, I have gone through every step of FSM check and youtube video that pertains to this.

I have tested all continuity from PCM to each lead on the harness for ckps, cmps. Everything was within .6-.8ohm.
I have checked for 5V supply at sensor harness and PCM ( key on, key off, cranking), I've checked signal wires the same, ground wires the same.
- Cmps/ckps 5v supply
. A17/K7
. .09 key off
. 5.19 key oncc

- cmps signal
. A18/K44
. .09 key off
. 5.19 key on

- cmps/ckps ground
. A4/K167
. .0V cranking,key on, key off

-ckps signal
. A8/K24
. 4mv key off, .09 key off
. 1.7mv key on, 5.19V key on
5.26V crank
-ckps 5v supply connected to harness
. .09V key off
. 5 19 V key on
. 5.26V crank

-ckps ground (2V)
. 0V key off
.016 key on
.180 crank highest

What do you guys think?

[JandDGreens]

Just wondering? Did you get your rig running?

[4x4JeePmaNthINg]

Yes it's running, but it's got a code I have been unsuccessful in tracking down. P1391. I've tested everything I can and I'm planning on taking it to a Chrysler mechanic. There they can load test it and put a scope on it. She is moving on her own power though!

[JandDGreens]

Nice, but hope you can figure out the code. C-AIR is a pain w/the engine light won't pass.
Is it running strong? And ready for the trails? Anyway glad you've got this far!

[xaza]

P1391 is Crankcase or cam shaft sensor circuit, seems you already knew that. It is often the crankcase position sensor which can test out electrically but won't work. Cheap sensors from Autozone, O'reilly and Advance tend to be defective out of box or have very short service life. I hear Jeep is the best place to get this, $194+ tax but maybe you got a bad one. Napa is $85 and appears to have gotten rid of the code on my buddies 01 Cherokee that we replaced yesterday. Also check the wiring harness near the back of the engine to make sure there are no spots rubbing.

[4x4JeePmaNthINg]

It's Mopar sensor#2, the replacement to the stock. Hypoid suggested it not likely being the crank as he didn't think it would run. CEL on every second start after clearing. Harness ohm tested good, signal and supply tested good.
Otherwise it starts and drives fine. I really hope it's not the sensor but I don't want to go spend another $100 for a Mopar sensor and that not be the case.

That's where the dealership comes in being able to mount a scope and seeing the pattern between the crank and the cam position sensor plus being able to do a load test and readout. 115$ diagnostic

[xaza]

That's a lot more reasonable diagnostic charge than I would have expected. Can't go wrong knowing the issue for the same or less money than throwing parts at it.
p.s. When the crankcase sensor went out on my Jeep I had intermittent problems and codes for months before it finally went and would not start or run.

[Hypoid]

4x4JeePmaNthINg previously posted: