Havig a bad day. CM2350 fuel pump failure.

[Rawze]

-- So I met a driver from the forum over at Mr. Hags a couple days ago. He was there because he was getting a check engine light whenever he pushed the truck up a hill and it got to about 30+ psi of boost. It would go away as soon as he let off it and so he drove it below 30-psi boost home,.. then out again for a trip to Chicago with a heavy trailer. He figuring he would just stop by Mr. Hags along his route, as his engine had been re-built by the stealershits a couple months back. Must be something simple or a sensor problem. - He went roughly 280 miles or so total from the time it started doing this until he got to Mr. Hags. Truck ran fine, it ran smooth even with the heavy trailer, and there were no signs of anything whatsoever wrong. It just had that pesky engine light coming on when the boost pressure was high, yet the truck pulled great.


I happened to go by there for other things and met the guy. Mr. Hag had just finished up repairing some issues with his fuel rail. Apparently when it was at his local stealershit for repairs, they left several fuel feed tubes going into the head severely under-torqued. It was clearly over-working the fuel pump and caused it to have a lot internal of excess flow back to the fuel tanks. The fuel rail pressure would not even hold pressure when the truck was shut off, it was so bad. Mr. Hag also said it had 19 recent counts of fuel pressure related codes. Surely this must be the trouble.

They tightened up all the fittings and checked it out again and it was back to normal. No rail pressure loss, not even 100 psi in one minute. - Surely that had to be it -- problem solved. -- -- (or maybe not?).


The guy grabbed his very heavy trailer and left out. He did not make it to the interstate before the CEL light came back on. Same problem when it reached 30 psi of boost. For a moment there, he just thought to himself that maybe he could just live with it, it was pulling the trailer fine, he will just go to Chicago and have it looked at again. -- He then decided to turn around last minute and maybe have Mr. Hag look a second time just to be safe.

-- VERY GOOD DECISION!!!

Mr. Hag left to go get a truck nearby and bring it back for some repairs. I was not sure how long he would be gone, and I happened to be there. I went out to the guys truck and check the codes it might have for the check engine light. That was the least I could do to try to help him. He was also becoming late for his departure time, and I think he was about to leave again. After all, it was running just fine outside of that CEL light.


He had 1 count of that infamous 559 fuel pressure code. -- "559-Injector Metering Rail 1 Pressure - Data Valid - Below Normal Operating Range - Moderately Severe Level"


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I stopped for a moment and thought,.. HMM,,... you only have the code when you try to make power,.. and it is that infamous code for a failing fuel pump,... and I said ...

DUDE, YOU SHOULD BE IN PANIC MODE!!!!!


That is the same exact symptoms and the same exact code you get when the fuel pump fails and IT DESTROYS THE ENTIRE ENGINE!!! -- He then replied,. the pump was checked a couple months ago. It looked great and it had the updated steel plungers. Nothing to panic over, it has already been taken care of ...

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Well,.. it is a good thing he had turned around, but in that 280 miles--- the damage was already done. This is what was found when the fuel pump came apart...

Here is the metal shavings in the fuel filter...


And here is the failed pump...


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The pump HAD THE NEW-STYLE OF STEEL PLUNGERS!!!


> Now the engine has to come all apart, the oil pan is full of metal shavings, the oil pump is destroyed, the oil cooler full of metal, the oil thermostat full of metal, the filter bypass valve full of metal. The rod and main bearings will need to be replaced and a LOT OF DIFFICULT flushing of the entire oil flow passages through the entire engine have to be cleaned...-- WHAT A MESS!!!- A lot of the engine will have to be pulled apart to clean out this debris because of that failed pump!.

This guy would have not made it another 600 miles before the engine would have locked up, it totally destroyed -- YET AGIAN!

This guy had an inframe by the stealershits done that was a complete hack-job a few months back. He then had to get it re-done by a SECOND stealershit to try to straighten it out, only to be charged for all new rockers and cam yet THEY PUT BACK THE OLD ONES THAT WERE DESTROYING THE NEW CAM!!!!

Mr. Hag found his bad rockers and the guy even showed Mr. Hag the receipt where they charged him for all new rocker lever assemblies. -- OTHER TRIP to the stealershits to get the rockers replaced under warranty and many many arguments and the blame game later,.. he does not make it another month,,. and now this happens.

Talk about having a bad day,... WOW! I feel bad for him. Now he has to have his engine taken apart YET AGAIN after all this. - What a mess.

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Here is an older thread on this same subject: http://rawze.com/forums/showthread.php?t...654#pid654

Tags:

fuel pump failure, xpi fuel pump, low rail pressure, low fuel pressure, fuel pressure codes, fuel faults, CEL