Suspension AND exhaust warnings with a derate.

[Jteakus]

Just got home from a 3,000 mile trip from NW Louisiana to Silverton, CO to Moab, UT and back. Amazing trip and I intend to do a write up on it for everyone but until then I have a question. I was cruising along at 75 mph enjoying life and bragging to my wife about how smooth riding, powerful and fuel efficient our JT is when the info screen blinks stability control problem AND exhaust issue see dealer. It then won't run over 67 mph.
Feeling pretty bummed out I pulled into a fuel station and thought about it. I have a Tazer installed so after looking everything over I went with clearing codes. I cleared codes from every module and it fired up and ran like a champ again. Now here is the thing: 10 days later at the exact same mile marker #13 on I-40 it did the SAME THING again! I pulled over and reset codes again then drove home.
Blows my mind. What do you all think?

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[Jteakus]

Here is pic of exhaust warning. Didn’t get one of the suspension but I believe it was something with stability control

 

[NCJL]

Wire harnesses getting too hot. Passenger firewall near exhaust is where I’d start.

I had similar experience 3 times. Not the same mile marker. Mine happened at about the 4th hour of continuous driving. I had multiple codes pop up, lost the coolant gauge, exhaust, stability and more. Cleared with Tazer.
The fix was heat wrap wire harnesses and installed oil cooler. 1 year and 15k plus miles, no issues since.

Happy the trip was good otherwise. Looking for the write up.

 

[Jteakus]

That is good information. I will look it over and add some heat wrap.
What oil cooler did you run and how did you plumb it?

 

[NCJL]

That is good information. I will look it over and add some heat wrap.
What oil cooler did you run and how did you plumb it?

The short answer is look at Insane Diesel. I did a variation of their bypass filter with cooler. Ive posted on this forum what I did in one of the Derating threads. I’ll have time later to find it.

 

[Jteakus]

Looking at it now.
Thanks again

 

[Escape.idiocracy]

Wire harnesses getting too hot. Passenger firewall near exhaust is where I’d start.

I had similar experience 3 times. Not the same mile marker. Mine happened at about the 4th hour of continuous driving. I had multiple codes pop up, lost the coolant gauge, exhaust, stability and more. Cleared with Tazer.
The fix was heat wrap wire harnesses and installed oil cooler. 1 year and 15k plus miles, no issues since.

Happy the trip was good otherwise. Looking for the write up.

Where did you tap in for the oil cooler?

 

[Teqsand]

If your oil temp goes over 400⁰, it's the firewall harness melting.... happened to wife's 21 JLURD

 

[Jteakus]

Oil temp never got close to 400 degrees

 

[Jteakus]

If I remember correctly it never got more than 40-50 degrees above coolant temp

 

[NCJL]

Where did you tap in for the oil cooler?

I taped the factory plugs at the bottom of the oil filter housing. The return is taped directly into oil pan.
The oil cooler is a Derale part 13870.
Do not tap out of the engine with anything larger than a 1/8 NPT tap. The filter housing plugs must be taped with 1/4 NPT and reduced to 1/8 NPT. They do make fittings, however they will need to turned down to fit properly.
From the filter tap go directly to the Insane Diesel bypass filter, no longer than 3’ to keep oil psi the same as factory.
3/8 Derale rubber hose. Push Lock fittings as needed.

 

[Escape.idiocracy]

I taped the factory plugs at the bottom of the oil filter housing. The return is taped directly into oil pan.
The oil cooler is a Derale part 13870.
Do not tap out of the engine with anything larger than a 1/8 NPT tap. The filter housing plugs must be taped with 1/4 NPT and reduced to 1/8 NPT. They do make fittings, however they will need to turned down to fit properly.
From the filter tap go directly to the Insane Diesel bypass filter, no longer than 3’ to keep oil psi the same as factory.
3/8 Derale rubber hose. Push Lock fittings as needed.

I thought this had been covered by a few folks and this was proven to only circulate 20%< oil and determined a location providing full flow was needed??

heck you could have been one of the dudes posting this information- it’s been a few months since I dove back into that topic….

 

[NCJL]

I thought this had been covered by a few folks and this was proven to only circulate 20%< oil and determined a location providing full flow was needed??

heck you could have been one of the dudes posting this information- it’s been a few months since I dove back into that topic….

I’m definitely one of the dudes posting this info.
If I don’t forget to turn to the oil cooler fan on, oil temps do not go above *240.

I’m seeing lower oil temps by about 20 degrees. If I leave the fan on all the time I can get into the 190’s on flat road.

I’m over 7k, rolling 42’s with 5.13’s.

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