Time for my thrid pcm? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > Time for my thrid pcm?

Rampage Bowless Soft Top Oconee offroadAlloy USA Still AvailableAdvance Adapters SYE Kits

Reply
Unread 09-22-2013, 03:23 PM   #1
cgcarpenter
Registered User
1997 ZJ 
 
Join Date: Jul 2012
Location: west covina, Ca
Posts: 661
Time for my thrid pcm?

Well this zj caught the electrical gremlin and it brought friends lol

It's continuously getting worse.
Stalling bucking hesitating misfire backfire. She decides she's a moody ***** lately. Whenever she wants. There's no tell on when it'll happen.


I've got codes:
P0108 map sensor voltage high
P0351 peak primary circuit current not achieved within maximum dwell time.
P0320 no crank at PCM during cranking(starts just fine)
And a cylinder 3 misfire code.

Where do I go from here. These sensors are all fine. Should I bite the bullet and buy a new PCM?

cgcarpenter is offline   Reply With Quote Quick reply to this message
Unread 09-22-2013, 06:39 PM   #2
Oldfrog
Web Wheeler
1997 ZJ 
 
Join Date: Feb 2008
Location: Louisiana/Texas
Posts: 4,047
It's not a Cardone is it?
If so, that's the PCM I just turned in, under warranty. They sold it to you...chuckle..

Make sure you have NTK o2 sensors installed.
Next time it stalls, pull over, leave the key on and remove the TPS connector, check the voltage on the 2 outside wires. See if you get 5volts. Turn the key off, then put it back on.

I bet it has 5 volts and starts right up, too.
__________________
Cajun Recipes and Fishing tips

Words of wisdom, Posted by Zeejay:
"..it's not air, it is the opposite of air... suckage so to speak."

Stalling? Work through Zeejay's list
Oldfrog is offline   Reply With Quote Quick reply to this message
Unread 09-22-2013, 07:52 PM   #3
neonhomer
Registered User
1996 ZJ 
 
Join Date: Sep 2010
Location: Edgewater, FL, Florida
Posts: 453
Do tell.... My 96 ZJ has a "die at random" issue... If you try to restart it without cycling the key, it won't refire. If you cycle the key off, wait a few seconds, and then try to start it, it will usually fire back up. I get the P0351 code - P0351 Ignition Coil A Primary/Secondary Circuit Malfunction.... I've replaced the coil, and the crank sensor was recently replaced with a Mopar sensor.
__________________
---------------
[COLOR="Lime"][SIZE="5"]NeonHomer[/SIZE][/COLOR]
Mid-Florida Jeep Club - Member
1996 Jeep Grand Cherokee, 4.0L/42RE/242 - Rebuilt motor w/ Comp cam (4/12), 3.5" Junkyard F>R lift, 31x10.5.x15 M/T's, Spartan Locked D44a, TC & tank skids, F&R adj trackbars, V8 steering arms
Galaxy DX99V CB, 102" SS Whip, Yaesu FT-2900R 2m, Larsen 1/4w mag mount, Sony HU, Massive 3way - F Door, Pioneer 3way - R Doors, MB Quart ONX304 Subs (x2), Lanzar 1600w amp.

"No Matter Where You Go... There You Are."
"Oh me oh my a lovely day is dawning. Oh what a joy I didn't wake up dead. So I can go to work and then resume my yawning, and get my sleep on site instead of in my bed" - Daria Morgendorffer (with my twist)
neonhomer is offline   Reply With Quote Quick reply to this message
Unread 09-22-2013, 08:09 PM   #4
cgcarpenter
Registered User
1997 ZJ 
 
Join Date: Jul 2012
Location: west covina, Ca
Posts: 661
Quote:
Originally Posted by Oldfrog
It's not a Cardone is it? If so, that's the PCM I just turned in, under warranty. They sold it to you...chuckle.. Make sure you have NTK o2 sensors installed. Next time it stalls, pull over, leave the key on and remove the TPS connector, check the voltage on the 2 outside wires. See if you get 5volts. Turn the key off, then put it back on. I bet it has 5 volts and starts right up, too.
Yeah I think it's a cardone one. But it's a year and a half old. I have smog soon so I'm ordering some from rock auto.

What would that test reveal?
cgcarpenter is offline   Reply With Quote Quick reply to this message
Unread 09-22-2013, 08:09 PM   #5
cgcarpenter
Registered User
1997 ZJ 
 
Join Date: Jul 2012
Location: west covina, Ca
Posts: 661
Quote:
Originally Posted by neonhomer
Do tell.... My 96 ZJ has a "die at random" issue... If you try to restart it without cycling the key, it won't refire. If you cycle the key off, wait a few seconds, and then try to start it, it will usually fire back up. I get the P0351 code - P0351 Ignition Coil A Primary/Secondary Circuit Malfunction.... I've replaced the coil, and the crank sensor was recently replaced with a Mopar sensor.
Sounds like a fuel pressure problem
cgcarpenter is offline   Reply With Quote Quick reply to this message
Unread 09-22-2013, 11:52 PM   #6
cgcarpenter
Registered User
1997 ZJ 
 
Join Date: Jul 2012
Location: west covina, Ca
Posts: 661
Disconnected my upstream O2 sensor and boom huge difference. Ran 95% better. Except for the cylinder 3 misfire.

Didn't get get a single hiccup all the way home from work or when I ran to the gas station.

Am I speaking too soon?

Probably but I'll see tomorrow morning when I drive to class.

Fingers crossed.
cgcarpenter is offline   Reply With Quote Quick reply to this message
Unread 09-23-2013, 03:45 PM   #7
cgcarpenter
Registered User
1997 ZJ 
 
Join Date: Jul 2012
Location: west covina, Ca
Posts: 661
Ran great all morning.

Except for one complete shutoff in a McDonald's drive through. Lol

Ordering my O2 sensors and then I'll go from there.
cgcarpenter is offline   Reply With Quote Quick reply to this message
Unread 09-24-2013, 12:17 AM   #8
cgcarpenter
Registered User
1997 ZJ 
 
Join Date: Jul 2012
Location: west covina, Ca
Posts: 661
Ran good all the way to work and all the way home.

Ordering new O2 sensors right now.
cgcarpenter is offline   Reply With Quote Quick reply to this message
Unread 09-24-2013, 05:11 AM   #9
Felonious_monk
Registered User
1988 YJ Wrangler 
 
Join Date: Nov 2007
Location: Jersey Highlands
Posts: 321
I can't help with your question, but I have a brand new computer for sale. I'd let it go for $150.
__________________
88YJ
53CJ-3B
Felonious_monk is offline   Reply With Quote Quick reply to this message
Unread 09-24-2013, 10:36 AM   #10
Oldfrog
Web Wheeler
1997 ZJ 
 
Join Date: Feb 2008
Location: Louisiana/Texas
Posts: 4,047
Quote:
Originally Posted by cgcarpenter View Post
Yeah I think it's a cardone one. But it's a year and a half old. I have smog soon so I'm ordering some from rock auto.

What would that test reveal?
Whether or not the 5 volt supply is getting shut down or pulled to ground by another sensor in that circuit....such as a crank sensor.

If you are getting ...say....2 volts..( key on, but not started) ..then you would disconnect the crank sensor, then re-check the tps sensor plug ( wiring harness side) and if it went back to 5 volts, you would know that the crank sensor was pulling it to ground. In that case....you would replace the crank sensor.

But if the tps had 5 volts to begin with, then something else is causing the PCM to activate the ASD relay and shutting the engine down....such as a bad 12volt feed to the PCM or, as in my recent case, the pcm itself.
__________________
Cajun Recipes and Fishing tips

Words of wisdom, Posted by Zeejay:
"..it's not air, it is the opposite of air... suckage so to speak."

Stalling? Work through Zeejay's list
Oldfrog is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.