12 Things You Can Do When Your ZJ Stalls - Page 11 - JeepForum.com

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post #151 of 432 Old 09-21-2013, 12:15 PM
cgcarpenter
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1997 ZJ 
 
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Quote:
Originally Posted by Oldfrog
Why not test the crank sensor before laying out $80+ on it? Video Link: http://www.youtube.com/watch?v=yp_kK6U8a64 If it's bad, Mopar is the way to go.
Because it's so intermittent that I don't think it would give me the results I need unless it was acting up when I test it. And I need this fixed very soon.

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post #152 of 432 Old 09-21-2013, 01:00 PM
cbr900
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Just found out the connections on my computer were bad...highly suggest if you have random stalling problems you pull the coolant reservoir and wiggle every last wire going to the computer with engine on. Unless you like buying sensor after sensor.
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post #153 of 432 Old 09-21-2013, 03:14 PM
Oldfrog
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Quote:
Originally Posted by cbr900 View Post
Just found out the connections on my computer were bad...highly suggest if you have random stalling problems you pull the coolant reservoir and wiggle every last wire going to the computer with engine on. Unless you like buying sensor after sensor.
That's an almost guaranteed sign that your PCM needs re-soldering or replacing. Usually, unless it's a single wire, cleaning it and zip tying it is just a band-aid. The stalling comes back eventually. Hundreds of us have been there.

2007 5.7 Hemi, Ltd. QD II -
1997 ZJ, 4,0 select trac, Up country, track lok.
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post #154 of 432 Old 09-21-2013, 06:46 PM
cbr900
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Quote:
Originally Posted by Oldfrog View Post
That's an almost guaranteed sign that your PCM needs re-soldering or replacing. Usually, unless it's a single wire, cleaning it and zip tying it is just a band-aid. The stalling comes back eventually. Hundreds of us have been there.
Its a reman stamped 2010 id bet my bottom dollar its just the actual connections on the harness. Going to junkyard to pull a few parts might pick up a new computer just in case.
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post #155 of 432 Old 09-21-2013, 06:49 PM Thread Starter
ZeeJay1997
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Quote:
Originally Posted by cbr900 View Post
id bet my bottom dollar its just the actual connections on the harness.
you can restore the spring tension in the contacts using a modified dental pick.
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post #156 of 432 Old 09-22-2013, 02:06 AM
cgcarpenter
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So my codes keep piling up.
P0351 ignition coil primary/secondary
P0320 no crank a PCM
P0108 map sensor voltage high.
And I also got a cylinder 3 misfire code.

So what does this sound like? Is my PCM going ape **** crazy?

Last time my PCM went bad I didn't get any codes and my obd scanner wouldn't even connect.
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post #157 of 432 Old 09-22-2013, 06:00 AM
AnotherRedZj
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Quote:
Originally Posted by cgcarpenter View Post

Last time my PCM went bad I didn't get any codes and my obd scanner wouldn't even connect.
That's what I'm experienceing right now

96 ZJ sittin up 6" on 35's with 4:56's and a 12k winch. Cuz...why the hell not!?
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post #158 of 432 Old 09-22-2013, 10:28 AM
Oldfrog
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How's your battery voltage?

2007 5.7 Hemi, Ltd. QD II -
1997 ZJ, 4,0 select trac, Up country, track lok.
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post #159 of 432 Old 09-22-2013, 10:51 AM
AnotherRedZj
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Quote:
Originally Posted by Oldfrog View Post
How's your battery voltage?
Good. Over 12 last time I tested it. Had it on the charger cuz I killed it the first day asking myself "wtf"

96 ZJ sittin up 6" on 35's with 4:56's and a 12k winch. Cuz...why the hell not!?
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post #160 of 432 Old 09-22-2013, 11:01 AM
Oldfrog
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Needs to be 12.6 or so....engine off.
13.8 with engine running. Jeeps are very picky about battery voltage.
I am assuming all your grounds and connections are clean and tight, right?

2007 5.7 Hemi, Ltd. QD II -
1997 ZJ, 4,0 select trac, Up country, track lok.
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post #161 of 432 Old 09-22-2013, 12:20 PM
AnotherRedZj
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Yessir

96 ZJ sittin up 6" on 35's with 4:56's and a 12k winch. Cuz...why the hell not!?
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post #162 of 432 Old 09-26-2013, 03:27 PM
cgcarpenter
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So... Let me through a brain teaser for you guys

I've driven the last 3 or so days without a situation with the stalling and what not as soon as I disconnected my upstream o2 sensor. Without any codes. Except the missing o2 sensors of course.

So I put one and one together and order new ntk o2 sensors.
And I installed the new sensors and without fail the stalling and such came back right away. With code P0351.
Ignition coil is new and tested good. Grounds are all clean.

Any suggestions?
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post #163 of 432 Old 09-26-2013, 03:41 PM Thread Starter
ZeeJay1997
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the common denominator is the ASD circuit. It furnishes heater voltage to the o2 sensors and coil voltage.

measure the coil voltage while running by back pinning the coil connector gn/bk wire and use one of those grounds you cleaned as reference (black lead). It should read the same voltage as you read across the battery terminals while running.

swap asd relay with another one just for good measures.
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post #164 of 432 Old 09-26-2013, 03:43 PM
cgcarpenter
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Quote:
Originally Posted by ZeeJay1997
the common denominator is the ASD circuit. It furnishes heater voltage to the o2 sensors and coil voltage. measure the coil voltage while running by back pinning the coil connector gn/bk wire and use one of those grounds you cleaned as reference (black lead). It should read the same voltage as you read across the battery terminals while running. swap asd relay with another one just for good measures.
Okay I think I'll just buy a new ASD relay. My transmission relay just went bad not too long ago. So other than that could it be anything else?
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post #165 of 432 Old 09-26-2013, 05:15 PM
cgcarpenter
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New ASD in.
I have to test voltages tomorrow because my brother popped the fuse in my cheap p.o.s. Multimeter.
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grounds , hesitation , no start , stalling , wiring

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