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Computer going goofy?

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I ran a single trailer up to Gillette, WY (7000lbs). Drove to Colo. Springs, got a call that my driver with an 05 Duramax was sitting in Ainsworth, NE with his engine cased. I leave CO, drive to NE, take a triple stack (GCW of 30,000lbs) to 30 NW of Sturgis, SD. On the way to Sturgis, pulling a long grade, my turbo - intercooler hose blew off. Pulled over, fixed it, blew off again. I creeped into my customers shop staying out of the throttle. Picked up a new tube at a Kenworth dealer and drove, as is back to Ainsworth. Fixed it there, loaded up his duramax and took off. :-laf



Truck ran like a monster for 15 miles then my check engine light came on, truck had no power and got very quiet. I began to feel bad about ragging on his duramax :eek: Anyway, It ran smooth, but had very little power, I could maintain 65 on the flat, 40's going up hill and hit 70's going down a long hill.

I threw these codes (multiples and they kept changing sequences upon key cycles)

p0234

p0237

p0299

p0480

p2509

We drove straight from NE to OK, shut the truck off, got breakfast, came out, fired right up, stick the throttle on the floor and she came alive. A huge plume of black smoke and we were on our way. Felt just as strong as it ever has. Check engine light still on, codes still there, but the truck is running fantastic. Could this be a result of low boost for a long time? Just a glitch?



Mileage was also good, 16. 5mpg pulling 11k :confused:
 
TX Gooseneck said:
p0234

p0237

p0299

p0480

p2509

:confused:



The only important code above is

"P2509 ECM/PCM Power Input Signal Intermittent".



It means you have a corroding contact that supplies power to computer,

a bad ground connection, or you have a wire shorting out. There was a thread on that on DTR about some wires rubbing near the AC compressor throwing all sorts of codes.
 
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The 237 is MAP sensor range high



and 234 is an overboost code



The overboost code will take all power away.



You obviously have more issues than that. But, that should get you started.





Later,

Wes
 
rbattelle said:
These trucks have no mass airflow sensor (at least through 2004. 5).



I agree with betterthanstock.



-Ryan





I know my '05 doesn't have one. I'm sure most if not all diesels don't have it. A MAS air flow sensor is an emissions type of sensor, typically found on gasoline engines.



-Ryan
 
obviously engine was defueling for some reason?! what are you using for boost fooling? i dont see if you have a box or not. if you have a box a loose connection somewhere?
 
I just have the resistor fooler that came with the turbo. I've had the overboost off and on since I installed the turbo with no lack of power by any means. It was with the new codes that everything freaked. I've looked and looked and can't find any connections that are rubbing, frayed, or anything along those lines.



The truck cleared the check engine light last night. I'm pulling a trailer to Amarillo today, so I'll see if it kicks in again.



A cased engine is a duramax that drops several injectors and ran until it exploded, essentially:D
 
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