Question about Chevrolet Silverado 3500HD

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2004 lly duramax

My duramax shuts down to 2000rpms and when it does it I can't get over 65mph. A new supply pump has been put in the tank, new ecm, new injectors, new map sensor, and new electrical 90 degree conectors to the injectors and I still having the same trouble. When it shuts down to 2000rpms, it shows to be low fuel rail pressure

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  • ROCKNFIRE177 Aug 08, 2008

    I HAVE A 2004 DURAMAX AND WHEN EVER I GO TO GIVE IT POWER THE ENGINE LIGHT KICKS ON AND I CAN ONLY GET TO 65MPH. THE SHIFTING IS REALLY FUNNY ALSO. I HAVE HEARD IT'S CAUSED BY THE FUEL SENSOR ON THE FUEL RAIL AND THEY HAVE A SHIM KIT THAT WILL BYPASS THAT SENSOR BUT I AM UNABLE TO FIND ANYONE THAT HAS IT. ANY INFO ON THIS WOULD BE HELPFUL.

  • Anonymous Feb 23, 2009

    SAME PROBLEM SHOWED UP MORE WHEN TOWING MY TRAILER FUEL PRESSURE REGULATOR 900.00 AT DEALER. GOOD LUCK

  • mtdew 46501 Apr 09, 2009

    go to parts hub.com enter your P/N. I just bought one for $127.00 however I still have the same problem and my fuel rail pressure is to high good luck

  • Anonymous Mar 20, 2014

    You can hear the fuel pump kick on the car will spin over but the injector has no pulse has new ecm an injector an honestly don't woman drop any more cash in the car

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Try hooking up a fuel pressure test gauge to fuel rail pre filter and post filter and rev truck to 2500 rpm what is fuel pressure ?
next using a vacume pump attach to fuel pressure regulator pump up while engine is running only pump up to 8 psi to see if pressure changes if not replace pressure regulator .
it could also be ur speed sensor switch on overdrive transmission
good luck with it

Posted on Jun 30, 2008

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