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Old 2 Weeks Ago
doum  doum is offline
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http://www.ausjeepoffroad.com/forum/...d.php?t=135911

https://www.jk-forum.com/forums/stoc...r-code-327570/
Not absolutely sure but this is a good way to start searching to solve your problem. Fortunately jk's run the same engine. The funny thing is that I have changed two times mine turbo hoses dealing the same issues with you but I don't remember the error code. Be aware that most times you can find the cutted hose only when you take it of and inspect it carefully.
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Adam H  Adam H is offline
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Hey All,

Thanks for all of your replies. I pulled off all the turbo hoses an inspected them thoroughly this afternoon, no holes splits or even reasonable ageing found. They all seem to be in quite good condition. The car's done about 165k km's.

On Sunday my father cleaned the engine intake using Liquid Molly Decarb spray, so it seems to be running cleaner but the problem still persists.

The Turbo seems to be engaging properly for the moment. Though the malfunction light keeps coming back even though I clear it with the Bosch scan tool.

Main remaining symptom can best be described as a pumping or pushing pulling rhythmic motion with the cars power when the rpm's are around 1800-2100rpm. Then it pushes through this and is ok.
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Get yourself some MAF cleaner and clean the MAF and also the boost pressure sensor/intake pressure sensor. Here is a post in the KJ section that may help as it shows how to clean the sensor on the KJ 2.8 deso, not sure if the KK is the same tho so please make sure before diving in.
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Adam H  Adam H is offline
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Firstly I just wanted to thanks everyone who took the time to respond to my thread.

After working through a small suggested list of things to check. I was able to track the problem down to a split in the hose from the Intercooler to the throttle body.

I also noticed that when I put my hand underneath the hose at the radiator end there was a considerable amount of what looked like oil or diesel.

Original part from Jeep was a only $270 and once diagnosed took about 45mins to replace.

The part no for the hose is - 55037958AB


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Last edited by Adam H; 1 Week Ago at 12:51 PM.
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Old 1 Week Ago
Adam H  Adam H is offline
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Whilst I was tracking down the problem, I cleaned both the EGR Sensor and the EGR Valve.

The sensor was pretty grubby but the EGR valve wasn't too bad, but gave it a good clean.

Once the new hose was one, the power returned and I'm back in business.

Thanks a bunch you legends!

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Last edited by Adam H; 1 Week Ago at 12:51 PM.
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That is good news Adam. The oil you found inside the hose made the corrosion. Every kk crd I know here in Greece has changed the first one at 50.000-60.000. I changed my second at 130.000. Now,if you dont mnd ,I would like you to give more details about egr sensor/valve. How did you pull them out, how did you clean them or where exactly are they?Because I haven't dealt with them at all.
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Quote:
Originally Posted by Adam H View Post
Thanks a bunch you legends!


Actually you’re a legend for figuring it out and then sharing the details and pics here to help others.
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Adam H  Adam H is offline
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Quote:
Originally Posted by doum View Post
Now,if you dont mnd ,I would like you to give more details about egr sensor/valve. How did you pull them out, how did you clean them or where exactly are they?Because I haven't dealt with them at all.
Ok so you need to pull off the top engine covers to reveal the engine. Then on the centre right of the engine top there is a little Bosch sensor labelled the EGR Valve.



Then once I pulled this out, I just gave it a clean with some petrol and a tooth brush, go gently so you don't damage the sensor itself. It shouldn't need to much pressure, I cleaned it in about 3-5mins.

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Last edited by Adam H; 6 Days Ago at 09:47 AM.
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