LMM: Kodiak Motorhome CEL data.

[McRat]

Just for info.

Our Kodiak motorhome threw a CEL while it was running hot (240-250°) up a long steep hill. 4,700 mi. Air temp was about 110° F.

First code was P0495 Cooling Fan Speed. Engine data seemed normal.

Second code was P2563 Turbo Boost Control. 3 times it failed. Third time:
Fuel Temp 221° F???
EGT 899°
Desired vane pos 21%
Actual vane pos 45%
RPM 2114
Coolant 224°F
mm3 fuel 101.

Note: Kodiaks have Electronic Engine Exhaust Braking from the factory with a dash mounted switch to turn it on and off. I had it on. They also have manual DPF Regen via another switch on the dash. Regen was not active at the time.

Odd. 221 deg fuel temp?

Perhaps the fuel is being heated by the radiator water? Guess I have to learn about Kodiaks.

 

[slowlmm]

Rpm 2100 so where you doing about 68mph -70 something mabey. looks as it was basicly throwing a under boost/ over boost . because the desired and actual where so far off ?

 

[slowlmm]

also i would check the fuel cooler thts some hot arse fuel. I woder if it was atempting regen ?

 

[malibu795]

iirc the fuel temp is messure in the fuel filter.

 

[slowlmm]

theres no temp sensor in our fuel sender. tht i hae ever seen. but i could be wrong

 

[McRat]

On our trucks, it's measure at the return line leaving the engine bay.

The wire you see going to fuel filter is WaterInFuel sensor.

 

[LBZrcks]

Did it throw the 2563 when you used the exhaust brake?

 

[McRat]

I was going perhaps 50mph, so it was 4th gear? O/D lockout on a Kodiak with 6-sp cuts you to 4th.

 

[McRat]

Did it throw the 2563 when you used the exhaust brake?

The exhaust brake should not have been on going WOT uphill.

 

[McRat]

This Kodiak has 4.56 gears, 6-sp 1000MH Allison, and 32" tires from the factory.

 

[LBZrcks]

Just for info.

Our Kodiak motorhome threw a CEL while it was running hot (240-250°) up a long steep hill. 4,700 mi. Air temp was about 110° F.

First code was P0495 Cooling Fan Speed. Engine data seemed normal.

Second code was P2563 Turbo Boost Control. 3 times it failed. Third time:
Fuel Temp 221° F???
EGT 899°
Desired vane pos 21%
Actual vane pos 45%
RPM 2114
Coolant 224°F
mm3 fuel 101.

Note: Kodiaks have Electronic Engine Exhaust Braking from the factory with a dash mounted switch to turn it on and off. I had it on. They also have manual DPF Regen via another switch on the dash. Regen was not active at the time.

Odd. 221 deg fuel temp?

Perhaps the fuel is being heated by the radiator water? Guess I have to learn about Kodiaks.

Oh I thought you did for some reason.

 

[McRat]

PS - Our weight was about 23,000 lb, and it's the stock 330HP engine and tuning. Plus BarnDoor aerodynamic package.

While 45-50 mph uphill speed is not something to brag about, it's faster than most heavy haulers.

 

[McRat]

Oh I thought you did for some reason.

Yeah, you turn the switch on, and the computer figures out when to use it. So you leave it on most the time. Kinda like the Grade Braking on the Allison. It's actually hooked to the Allison Grade Braking also. There is no T/H setting.

 

[Alligator]

When you doing the DPF delete Pat?

 

[Kat]

When you doing the DPF delete Pat?

He's not This thing has 100,000 mile warranty

 

[McRat]

When you doing the DPF delete Pat?

Probably when it get twin turbos...

 

[Alligator]

I have heard that before:rofl:

On edit, that comment was for Kat response to the 100K warranty...

 

[McRat]

What could be useful is the Electronic Grade Braking feature.

We need to get Full Flash capability for LMM's so we can use this on pickups for free.

 

[Alligator]

Probably when it get twin turbos...

That's the spirit Pat! Way easier to work on.

 

[LBZrcks]

Yeah, you turn the switch on, and the computer figures out when to use it. So you leave it on most the time. Kinda like the Grade Braking on the Allison. It's actually hooked to the Allison Grade Braking also. There is no T/H setting.

Oic, gotcha