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Generic problem for all Chevrolet Silverado 3500HD Car...

2004 lly duramax

By trent32 on Jun 29, 2008

" "

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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Same Problem

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- mtdew 46501

Feb 23, 2009

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

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.- ROCKNFIRE177

Best Solution

posted on Jun 30, 2008

280zlvr

Rank: Guru
Rating: 88%, 93 votes

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

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This Problem Also Relates To: 2004 Chevrolet TrailBlazer 2001 Chevrolet Blazer 2003 Chevrolet Suburban 1500 2000 Chevrolet Cavalier 1995 Chevrolet Camaro 1996 Chevrolet K1500 1997 Chevrolet Blazer

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