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Unread 06-29-2012, 10:41 AM   #1
OpzJeep
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Still in need of help, going crazy!? Dies while driving, starts right back up

My jeep is a 2005, 4.0, 6 speed. I've owned it for about two months now and have been dealing with issues nonstop for 4 weeks now.

It randomly dies while driving, but starts right back up. There is a stutter that happens, either at idle, or while driving down the road. I'm getting some stuttering while excelerating sometimes now. At first there were no codes at all. I replaced the crank position sensor, and can position sensor. Checked all grounds. I cleaned the IAC and actually have a new one on order. Now, sometimes my gauges quit while driving, but the jeep stays running? I'm getting codes now, u0155, p0508, 0300...I have autotap scan software so I can watch things and read codes. But for some reason my software won't run the diagnostic tests.

My freeze frame shows that the 0300 was caused my random, multiple cylinder misfire.

I pulled the gauges and cleaned wire connections.

Is there any common theme here that's causing all this??? Or do I have multiple problems? I'm at a loss, and trying to get it figured out is driving me crazy!?!

HELP!
Mike

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Unread 06-29-2012, 12:00 PM   #2
flying_bosun
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Not sure, but this TSB has been getting a lot of press lately and may be related.

Quote:
Originally Posted by Knuckelhead

Have you seen this TSB?

THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-027-02,
DATED SEPTEMBER 06, 2002, WHICH SHOULD BE REMOVED FROM
YOUR FILES. THIS IS A COMPLETE REVISION AND NO ASTERISKS
HAVE BEEN USED TO HIGHLIGHT REVISIONS.

SUBJECT:
4.0L Rough Engine Idle After Restart Following A Hot Soak

OVERVIEW:
This bulletin involves the installation of a fuel injector insulator sleeve.

MODELS:
2000-2004 (TJ) Wrangler (Domestic and International Markets)
1999-2004 (WJ) Grand Cherokee (Domestic and International Markets)
2001-2004 (WG) Grand Cherokee (International Market)
2000-2001 (XJ) Jeep Cherokee (Domestic and International Markets)
NOTE: This bulletin applies to vehicles equipped with a 4.0L engine (sales code = ERH)

SYMPTOM/CONDITION:
Customers may describe a 20 to 30 second rough idle following the restart of a heat soaked engine. This condition may be most noticeable when the engine is restarted following a prior 10 to 20 minute heat soak in hot ambient conditions of approximately 32 C (90ºF)or higher.
This condition may be consistent with short city stop-and-go driving trips and can be aggravated by the use of fuel with a high ethanol content.

Depending upon various conditions a MIL may occur due to DTC P0303 - Cylinder #3 Misfire.
This condition may be caused by heat from the exhaust manifold that following engine shut down migrates to the area around injector #3 and causes fuel vapor to form within the injector. This in turn may cause a momentary misfire of cylinder #3 until the fuel vapor is cleared of injector #3.

The insulator sleeve lowers the injector #3 temperature to a point below which the fuel will not normally vaporize.

DIAGNOSIS:
1. If vehicle exhibits a rough idle, and if a misfire of cylinder #3 is observed following a 10 to 20 minute hot soak, perform the Repair Procedure.

PARTS REQUIRED:
Qty. Part No. Description

1 56028371AA Ignition Wire Shield

REPAIR PROCEDURE:
1. Cut insulator sleeve, p/n 56028371AA, to make two (2) insulator sleeves
about 25-30 mm (1 in.) in length.
2. Install one sleeve around injector #3, with the slit on the upward facing side of the
injector. Install the other sleeve with the slit on the downward facing side of the injector.
3. Confirm sleeve is flush to intake manifold surface around injector.
4. Check injector #3 wire and ensure that the injector is rotated to a 2 o’clock position (from driver’s side of vehicle).

POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE: 0.2hrs

FAILURE CODE:
AM Authorized Modification

...
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Unread 06-29-2012, 12:38 PM   #3
loganm
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At first it sounded like a fuel line or pump issue. But as I read on not so much unless you have multiple issues acting as one lol. Good luck.
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Unread 06-29-2012, 01:23 PM   #4
Necko2529
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Have you tried a new battery? I started experiencing all source of problems until I changed the battery and put them all to rest...
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Unread 07-01-2012, 10:24 AM   #5
OpzJeep
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I have not Changed the battery, could that still be a cause? Jeep starts fine? It's almost undriveable as of yesterday. I can't take it 10 miles without it dying 10 times, and now I have to let it sit awhile before it will restart without immediately dying again. At one point I got a flashing CEL also, so whatever is up is getting worse. I may have to just take it to the jeep dealer, but I sure hate to....
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Unread 07-01-2012, 10:40 AM   #6
77351wcj5
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Did you use OEM sensors?
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Unread 07-01-2012, 04:02 PM   #7
OpzJeep
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Well, no I didnt use OEM ones, just what Oreillys had local
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Unread 07-01-2012, 04:17 PM   #8
CJ7-Tim
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Your Jeep is trying to tell you what is wrong, go with the Check Engine Light trouble codes. Solve the lowest number code first, higher number codes may, or may not be from faulty data provided by the faulty sensor/system of the lowest numbered code.

Bucking, stalling, and backfiring are almost always O2 sensor related. Many O2 sensor faults will not cause a check engine light or trigger a code. P0300 can be ignored.


P0155 JEEP - O2 Sensor 2/1 Heater Performance
Possible causes
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit wire harness is open circuit or short circuit
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit poor electrical connection
- Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit



P0508 JEEP - Idle Air Control Valve Sense Circuit Low
Possible causes
- Idle Air Control (IAC) motor wire harness is open circuit or short circuit
- Idle Air Control (IAC) motor circuit poor electrical connection
- Faulty Idle Air Control (IAC) motor

When is the code detected? The PCM senses a short to ground or battery voltage on any of the control circuits for 2.75 seconds while the IAC motor is active.
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Unread 07-02-2012, 07:58 AM   #9
OpzJeep
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Well the code is a U0155, which is lost communication with the dash I think? It started the dying thing a few weeks before the dash gauges would just all go dead, not the DIC, just the gauges. When it does this, jeep is still running, the gauges just aren't working. I pulled and inspected the wiring to the gauges, but no luck. I have no idea if the two problems are related? When it dies while driving i barely notice any bucking or anything, I just all the sudden realize the thing has died. If im paying super close attention, i can see that it is running rough right before it dies. When it first started doing it, I could push in the clutch, cycle the key and it would fire right back up, then I could keep driving. Last day I drove it, I would get a flashing CEL, it would die, then would not restart until it sat awhile. It would start, but immediately die. After setting a few minutes, it would start again, but I could only go a few miles before the whole process started again...
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Unread 07-03-2012, 08:13 PM   #10
OpzJeep
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Well, I'll know soon whether it's the right fix or not, but the jeep dealer diagnosed it as a faulty PCM. They want 1000.00 installed for it, but I passed. I have one on order, for 140.00 and I'll install myself....
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Unread 07-03-2012, 08:16 PM   #11
drumkite2
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Quote:
Originally Posted by OpzJeep View Post
Well, I'll know soon whether it's the right fix or not, but the jeep dealer diagnosed it as a faulty PCM. They want 1000.00 installed for it, but I passed. I have one on order, for 140.00 and I'll install myself....
Where did you get it from?
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Unread 07-03-2012, 08:27 PM   #12
ujoint
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How did you Make out Did the PCM fix the Problem?
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Unread 07-03-2012, 09:00 PM   #13
OpzJeep
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I got it from Jax autoparts. It's garanteed good, and worth a shot if it saves me 900. Haven't got the PCM yet, should have it by the end if the week, so we'll see!
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Unread 07-08-2012, 06:47 PM   #14
OpzJeep
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Figured I would give an update! Well the jeep dealer told me it was the PCM and they wanted 1000.00 for parts and labor to fix. I paid them 89.00 for the diagnostics and found an PCM for 140.00 shipped to my door. Well yesterday it arrived and I changed it out.

Update is, that so far 120 miles and everything is running perfect!!

Now to tackle the damn distributor on this thing that I've been reading about....damn I wish I would have researched the 05/06's before I bought...ashame too, because this really is a nice clean jeep!!

Hindsight...
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Unread 07-08-2012, 09:02 PM   #15
Jerry Bransford
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Quote:
Originally Posted by OpzJeep View Post
I have not Changed the battery, could that still be a cause? Jeep starts fine?
No, not if the battery is able to start the engine without problem.
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backfiring , bucking , o2 sensor , p0155 , stalling

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