2007 Jeep Grand Cherokee Overland Stalling Problem - Page 5

Walt · 02-06-2011, 07:50 PM

Quote:

Originally Posted by charlesrshell

Well your Mrs has more responsibilities than mine. Being retired USAF I have always labeled my Mrs the Commander of the War Department.....The dealership changed all MDSs. I think there are four or them, right??.....

Spent time in USCG / USCGR (20 yrs) and retired from USNR (10 yrs). I may be the Captain, but she's the Admiral.

Yes. There are 4 MDS solenoids, all located under the intake manifold. Good point. Thank you. I'll ask the technician to look at them also while he is in that deep.

MIL went out today (3 good trips). MDS failures and MIL illuminations occur most frequently when it has been sitting outside 4+ hours in freezing weather (at work or at school).

I've been keeping a log of date, mileage, circumstances, and symptoms for the dealer's tech. Since they have difficulty reproducing the conditions, I'm doing my best to provide the next best thing. Maybe they can connect the dots. I haven't been able to do it thus far.

**charlesrshell** · 02-07-2011, 04:02 AM

Quote:

Originally Posted by Walt

Spent time in USCG / USCGR (20 yrs) and retired from USNR (10 yrs). I may be the Captain, but she's the Admiral.

Yes. There are 4 MDS solenoids, all located under the intake manifold. Good point. Thank you. I'll ask the technician to look at them also while he is in that deep.

MIL went out today (3 good trips). MDS failures and MIL illuminations occur most frequently when it has been sitting outside 4+ hours in freezing weather (at work or at school).

I've been keeping a log of date, mileage, circumstances, and symptoms for the dealer's tech. Since they have difficulty reproducing the conditions, I'm doing my best to provide the next best thing. Maybe they can connect the dots. I haven't been able to do it thus far.

WOW, nice career Walt. i was 26 years USAF aircraft mechanic retired E8. Sure would be a good time to R&R your MDS solenoids while the manifold is removed. Do your MDSs make a real lite clinking noise? The dealership says that is the noise I am hearing since day one. To me it almost kinda has a sound of an exhaust manifold leak. Good luck with everything. When I call the dealership today I am going to ask them if they want me to try out my scanner to see if any codes at all. I just feel uncomfortable using it since I don't have any experience with it. I downloaded and printed the instructions and it appears simple till you get to that there flight mode stuff.

**charlesrshell** · 02-08-2011, 06:09 AM

Car stalled out again yesterday on my wife (Commander of the War Department) while she was creeping along in slow moving traffic from an accident. She said the same three lites came on. Engine problem, low oil pressure, and the ETC (Electronic Throttle Control). ETC lite went out in a couple of seconds. Called the dealership and the service writer said that he thinks that is a normal situation for the ETC lite. Taking the car in to the dealership today for more troubleshooting. I hope there is some codes stored away. Changing all the coils was a big help but there is something still killing the engine. Hope they can discover it. I am not sure if I will ever trust taking this car on a road trip again.

WK-916 · 02-11-2011, 11:48 AM

Quote:

Originally Posted by charlesrshell

How long has it been now since you changed the CPS and it cleared up your HEMI dieing issues?

It had to be at least 6 months ago... in the Summer.... maybe July...

Didin't always leave a code.... intermitent engine stalling.

WK-916 · 02-11-2011, 11:53 AM

Think its time to take it to another dealer.... these guys sound like idiots

**charlesrshell** · 02-11-2011, 01:07 PM

Quote:

Originally Posted by WK-916

It had to be at least 6 months ago... in the Summer.... maybe July...

Didin't always leave a code.... intermitent engine stalling.

Glad your car is still running good. I told the dealership about the CPS fixing your issues so hope they take a close look at it. Took the car in last Tuesday and haven't heard a word.

Walt · 02-11-2011, 06:59 PM

Well. Just picked up HEMI from Jeep dealer. Seems they replaced the LHS EXHAUST Manifold, not the INTAKE Manifold as I was first told.

All DTC's were cleared, but everything must reset now as the battery was disconnected. So I have another week of science experiments to see if this does it. Probably nothing of use to the OP on his stalling problem.

At least it is covered by the lifetime powertrain warranty.

"My Grand Cherokee isn't getting older...it's getting newer part-by-part."

**charlesrshell** · 02-19-2011, 04:33 PM

UPDATE Got the Jeep back yesterday. Dealership had it for ten days with a flight recorder installed. The recorder button has to be pushed immediately after the engine stalls and it records the last fifteen seconds of data. It stalled one time at the dealership while it was idling but the technician was not in the car to push the button. So now we are driving this crazy Jeep with the flight recorder still installed and will push the magic button next time the HEMI does a shut down. Will post again when something happens.

How are your HEMI issues doing Walt?

Walt · 02-19-2011, 05:22 PM

Quote:

Originally Posted by charlesrshell

UPDATE Got the Jeep back yesterday. Dealership had it for ten days with a flight recorder installed. The recorder button has to be pushed immediately after the engine stalls and it records the last fifteen seconds of data. It stalled one time at the dealership while it was idling but the technician was not in the car to push the button. So now we are driving this crazy Jeep with the flight recorder still installed and will push the magic button next time the HEMI does a shut down. Will post again when something happens.

How are your HEMI issues doing Walt?

I had high hopes when I ran the flight recorder on 2 different occasions. Results were disappointing. I don't think Chrysler actually did any analyses on the data we collected. Unfortunately no actual DTC's were generated in that process. Hope yours turns out better.

Since last week when I posted, it threw 2 more RHS O2 sensor and Catalytic Converter Efficiency codes.

Dealer replaced passenger's side (RHS) exhaust manifold yesterday. Threw same DTC P0430 (RHS Catalytic Converter Efficiency below threshold limit) again today.

They will probably have to replace the Y-pipe and catalytic converters. I'll notify dealer's service manager Monday and see if we can schedule an appointment for Friday AM (assuming it has to be ordered).

Told the service people that the orange engine-shaped light in the center of the instrument cluster is the "Engine Running" light, not the MIL. That's because mine is on whenever the engine is running.

WK-916 · 02-23-2011, 08:55 AM

can you say.... Lemon

**charlesrshell** · 02-23-2011, 02:44 PM

Quote:

Originally Posted by WK-916

can you say.... Lemon

Yep, I think I have a lemon. This is the sixth day with the flight recorder installed and no stall outs yet.

Walt · 02-23-2011, 04:35 PM

Quote:

Originally Posted by charlesrshell

Yep, I think I have a lemon. This is the sixth day with the flight recorder installed and no stall outs yet.

Great, isn't it? I actually think that having the flight recorder in the electronic circuit alters the resistance, capacitance, and inductance of the bus.

When mine begins to misbehave, I threaten to take it to the dealer and it starts running well again.

(I wish.)

Friday's appointment is to replace the Y-pipe and both cats. MIL stays on continuously now (DTC P0430). Part is in, so I'll take it in Friday @ Noon.

With yours, I keep going back to a sensor or component that has an overall effect: camshaft position sensor, crankshaft position sensor, MAP sensor / EGR valve (less likely), or lube oil pressure transmitter. Thinking along the lines that an intermittent signal causes the engine to shut down as a protective mechanism when the permissive signal is interrupted.
I'm assuming you tried the wiring harnesses for a loose connection or a wire frayed inside the harness.
Another less-likely possibility is a ground connection (not the main one on the battery because they have disconnected and re-connected it already) around the engine bay. As I recall, there are several, so you'll have to look around the engine with a flashlight. If you get stuck, I can look at the FSM later this weekend. [Have a test and lab experiment reports to correct before that though.]
Finally, several of the '05-'06 vintage WK's have reported that the ignition module behind the switch went bad and caused spurious shutdowns. I think it's about ~$45 part, so maybe dealer will spring for it. Possibly use the argument that they can't find the root cause, so why not try your recommendation?

**charlesrshell** · 03-06-2011, 04:23 PM

UPDATE: Car went back to the Dealership Monday 28 Feb with three engine shut downs recorded in the flight recorder. They called me two days later and said they sent the data to engineering and they had a P0688 code. The technician has changed the crank sensor, cam sensor, ASD relay, and ignition switch. Engine is still shutting down. Troubleshooting charts are saying to change the PCM again. The technician is removing parts, fuses, etc trying to eliminate different circuits/systems so he can track down what is causing the shutdowns. He is also awaiting word from the engineers. Haven't heard anything else since he called last Wednesday 2 March. There must be a hell of a bug in our Jeep.

90grandoneer · 03-06-2011, 04:56 PM

I think I remember someone having a similar problem and it ended up being a bad wiring harness...I think coming off the FCM. Does anyone else remember anything like this???

Walt · 03-06-2011, 05:05 PM

Quote:

Originally Posted by 90grandoneer

I think I remember someone having a similar problem and it ended up being a bad wiring harness...I think coming off the FCM. Does anyone else remember anything like this???

Yes, I do. His was a frayed wire (or insulation) where it passed through the firewall, but inside the protective covering, where it couldn't be seen.

I was thinking of that when I suggested wiggling all of the wires (and connectors) with the engine running.