Welp, I broke down and gave it my best shot last week... O/OP rant

ElmerFudpucker · Nov 7, 2025 at 9:22 AM

Ridgeline said: ↑

337hp out of a 400hp rated engine?

did you do a blow by test too?
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Truck engines are rated at the flywheel. There is generally a 75 horse loss through drivetrain. So 337 rwhp is a pretty healthy 400

abyliks · Nov 7, 2025 at 9:31 AM

Luck changes just like that, can definately be irritating but hopefully it’s fixed, I know I’ve had a few weeks where I wish I could have been lucky to get off paying only 8k In repairs so it could of been worse

Constant Learner · Nov 7, 2025 at 11:31 AM

KDHCryo said: ↑

Words to live by.. I've got $27K left owed on this truck. I'll have it paid off summer of next year. This fiasco wouldn't have hurt so much If I hadn't just put $8k worth of new Bridgestone tires on it, but I wanted to get them worn in before winter.

Don't worry, something else will break next week.

I've got credit cards, but they cost money. I'll survive, just have to stay out another few weeks.

I dunno about a new truck, good friend of mine from KAG O/Op running food grade bought a new Pete 589 with ISX15, 2 years ago. First 6 months he was in the shop for 2 months total downtime fixing warranty electrical issues. He lost 2 months revenue on a new truck, no compensation from Pete. Lost Revenue will kill you, you still gotta make those payments.
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You simply don't generate enough revenue from what you do. Your business model is not sustainable and you need to make changes sooner than later.

FloridaRetired · Nov 7, 2025 at 1:19 PM

Constant Learner said: ↑

You simply don't generate enough revenue from what you do. Your business model is not sustainable and you need to make changes sooner than later.
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If you sit for weeks on end and possibly another weeks on end, no business model is going to work.

JB7 · Nov 8, 2025 at 7:47 AM

KDHCryo said: ↑

TLDR version, changed out $3000 worth of injectors, didn't fix it. Still stuck in Dallas, TX. Didn't clear codes.

Long version....

Yep, started breaking down last weekend. Picked up a load in Charlotte, NC going to Dallas TX.

2020 Cascadia at 543K miles running heavy with a tanker, started throwing codes SPNI 4258, FMI 4, injector ground short to body on injectors 4,5,6. Started throwing codes last Saturday around Talladega, AL. Limped the truck to Birminghma, AL.

I diagnosed them myself with DiagnosticLink and made the call to sit at the Pilot in Birmingham AL on Sunday, wait on the parts dept Peachtree Freightliner to open Monday AM. Sunday afternoon took the top of the motor off down to the valve train.

Monday Am at 0700, Walked a mile with a backpack and bought the parts from Peachtree Freightliner I bought all the parts to change out injectors 4,5,6, rear injector wiring harness, plus the fuel lines, fuel line gaskets. 3 trips with Uber to get the spec tools (pry bar set, 12 pt 13mm socket for hold down bolt) later, got the new injectors changed out in the Pilot parking lot. Walked back and got to it. Everything put back together 1500 Monday.

Changed everything out, reprimed the truck, added the new reman injector codes in Diagnostiklink software, rewrote the MCM for the new injector codes, drove up to the dealer and gave them back my cores for the 375$ each credit, and proceeded to Dallas TX. 690 miles.

Set the cruise at 68 and sometimes had to step it up a little every now and then. Got to Dallas and delivered that load. Truck ran like a scalded dog, thought I had it fixed.

As soon as I got back on the Interstate, bam, threw the codes again. That means the harness is shorting outside the motor, or it's a computer (MCM) issue. I cleared the code once again so I wouldn't be de rated and could get down the road.

I got to the tank wash and shut the truck down, then confirmed my wiring harness had continuity from injectors pins to MCM, then called Freightliner Dallas South and put the truck in there to get the MCM changed out. ON a Friday morning, and that was something. That's not gonna happen. On a Friday. AT Dallas Premier Truck Group South. We ain't gonna get a competent tech on it till Monday.

So I'm sitting here in a hotel in Dallas, Freightliner Dallas is twiddling their thumbs because the code ain't active. Of course they run a skeleton service crew on Sat and Sundays.

When I uber to the dealer Monday morning I'm gonna tell them to hell with diagnosing. Just change the MCM, I've already diagnosed it. And I'm losing 1100$ worth of revenue a day. Change the part, let me out of here.

That way maybe I can get out of this hotel at $110 a night.
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There's freeze frame data. You can see various parameters at the time the code was set. May have flushed out a problem like yours. Clear the codes and check when it sets again for comparison.

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Welp, I broke down and gave it my best shot last week... O/OP rant

ElmerFudpucker Road Train Member

abyliks Road Train Member

Constant Learner Heavy Load Member

FloridaRetired Medium Load Member

JB7 Heavy Load Member

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Welp, I broke down and gave it my best shot last week... O/OP rant

ElmerFudpucker Road Train Member

abyliks Road Train Member

Constant Learner Heavy Load Member

FloridaRetired Medium Load Member

JB7 Heavy Load Member

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