Commander 3.0l crd engine problem "PLEASE HELP"

[GP_CRD]

I had similar electrical issues ( Lucky for me under warranty ). Had the swirl motor replaced, then the ECU but still the warning light and the switch to limp home mode. I then decided to fault find for myself. In 20 minutes i had found a relay that was sitting 2 0r 3mm higher than the rest. I pushed it down and amazingly the warning lights disappeared and the car has subsequently run perfectly for the last 18 months.

Worth a look for anyone with electrical problems.

[gleeson235]

Originally Posted by GP_CRD

I had similar electrical issues ( Lucky for me under warranty ). Had the swirl motor replaced, then the ECU but still the warning light and the switch to limp home mode. I then decided to fault find for myself. In 20 minutes i had found a relay that was sitting 2 0r 3mm higher than the rest. I pushed it down and amazingly the warning lights disappeared and the car has subsequently run perfectly for the last 18 months.

Worth a look for anyone with electrical problems.

I'm with you CRD. I am not buying a new EMC. When I find this fault, & I will. I am positive that it will be something simple. Broken wire, faulty relay, poor connection or earth. I spent 3 weeks on a robotic welder at work with a electrical problem that the so called technicians said the computer needed replacing & I tracked it down as a broken wire in the cat-trak. When I was working as a mechanic, there was no written procedures to follow, it was trouble shoot until you found the problem. I have the testing procedures for this fault code & it is simple test with a ohms meter, & if that passes replace, replace, replace. These so called Jeep Technicians change oil & follow simple test procedures to replace parts. When that doesn't fix it, sorry, there is nothing else we can do. Not good enough. This is our 4th Jeep & have had a good run, but i have also had 12 Holden’s without major issue.

[gleeson235]

Originally Posted by lifted TJ

Hey sorry to here have just read everything. I wouldve done n insurance job on it just because the egr valve has been replaced doesnt mean its working would check it again. Check the voltage out put to the wires to the sensors on the engine as the ecu voltage varies to each sensor i think. Um…check air filter and fuEl filter as there may be a restriction or u may have shit fuel. When u say surging while driving can u explain that better. Dont buy a computer for it yet be the last thing id do for that price. Earth connections on something important as ur problem comes and goes…cant think of anything else at the moment.

Hey lifted, thanks for your interest. The new EGR was checked with the scan tool & was proven to be working. I have checked nearly all main parts & sensors related & non-related to this code. The engine runs fine when started & drives well with no power loss. It takes about 10-30 minutes of driving before you start to feel the surging. If driving on the freeway on cruse lurches like it is going to run out of fuel. If it is sitting at the lights idling, the revs will rise then fall slightly over & over. Regardless where you are when the surging starts, the next time you touch the throttle, it will fault out. When it faults, sometimes it goes into limp & sometimes you lose throttle all together. Stop the car, turn off, remove key, restart & if you’re lucky you can move out of the 3 lanes of traffic you just stopped in front of. If the car stars with no fault light, off you go again until you feel the surge, then history repeats. My wife drives it to work (about 50km's) has noticed that on the way to work it faults nearly every time at the same corner, about 35 km's from home. On the way home it hardly ever faults, but if it does, it dose on a corner about 3km's from work. Weird.

[gleeson235]

My Wife, after driving the Commander since it came back from the dealership, told me that every time she goes around a right hand corner the car would fault. At first I thought it was just another bug the thing developed, but after a couple of weeks of the reoccurring cornering issue I decided to look into it further. It was something new to try & trace. So after a short examination under bonnet I realised that the battery, if pushed, was moving about 10-15cm. After removing the battery it become apparent that the bolts that hold the battery carrier in where put in a few threads but not done up allowing it to move. There is also a long leg on the left hand side of the battery carrier that extends down to the chassis. The wiring loom would usually sit to the left of the leg but was stretched around the right hand side. My conclusion was that the battery was moving on corning pulling the loom & causing the fault. After testing the ohms on all 6 wires & trying to replicate the movement with no joy, I finally snapped & did something I should have done a long time ago. No, I didn’t set fire to it. I cut out all the wiring that I was having problems with & replaced it with new. Put it back together & took it for a test drive. No surging & No fault. Came home & hooked up the horse float for another test drive. No surging & No fault. 2 hours of driving & No surging & No fault. Of course this does not mean it’s fixed but it is a good sign. Usually it would fault out 20 mins from home & if you hooked up the horse float it would fault out in the driveway.
Anyway, fingers crossed.
Again.
I will let everyone know how it goes.

[LSE3.9]

That sounds really positive so here's hoping that you have finally fixed the problem. Did you strip down and examine the old wiring looking for something out of place which would explain the issue?

[gleeson235]

[/IMG]

Originally Posted by LSE3.9

That sounds really positive so here's hoping that you have finally fixed the problem. Did you strip down and examine the old wiring looking for something out of place which would explain the issue?

Thanks mate, I am hoping so. I didn't open any wiring looms as it disappears below the radiators & then up behind the air box before going through the firewall. What I did notice though when tracing the loom that the wires are exposed to road debris at the front left hand side of the radiator (see photo attached). I am wondering if it may have been damaged by a rock. I will be covering it with something regardless.


http://i1116.photobucket.com/albums/...5/IMG_0079.jpg
http://i1116.photobucket.com/albums/...5/IMG_0078.jpg
http://i1116.photobucket.com/albums/...5/IMG_0081.jpg

[LSE3.9]

As you say it is exposed and may have copped a hit. Maybe also water/moisture has been getting in and travelling along the loom and causing havoc with the loom connections.

Doesn't matter now though - I am sure the problem is now rectified and without the huge expense of new parts.