2003 Duramax Dont Start on own and surges

yellowchevy

Well-known member
Sep 9, 2010
1,926
82
48
Louisburg, KS for now
lol who the hell am I talking too then... This interweb gets confusing

This is funny!!! :roflmao:

If all else fails. Get matches, chair, & beer. Light match & start the rag you stuffed in the fuel tank, this will give you enough time to get away before the fire gets to big. Next Setup chair, open a beer, & watch your frustrations burn away!!!

Start with the filter head, that's probably your main problem. Then move on to FPR followed by flow rates; as others have stated.

Yellowchevy
 

renegadeguy

New member
Aug 19, 2014
8
0
0
alright i tried the filter head kit with no such luck. We have come to conclusion that its gotta be the Fuel pressure regulator as we had a guy cranking engine while the other primes the fuel hard while cranking and not even close to firing its like the regulator wont open up and let fuel through at startup. now where do you guys recomend getting a fpr from as its a $500 part from GM. Any other decent aftermarket ones that work? thanks
 

NC-smokinlmm

<<<Future tuna killer
May 29, 2011
5,215
365
83
At Da Beach
Someone most likely has a good used lb7 reg on here bc a ton of lb7 guys run LBZ regs to up the pressure. Post up a WTB thread...
 

WI Huck

Where does the time go?
Feb 8, 2012
137
0
16
I should add that if the truck has near or above 150,000 miles, don't bother with just the regulator. We sell a whole new pump with a regulator under $700.00. Take the money you will spend and use it towards the pump. It would be a bummer to buy a regulator and then need a pump also shortly down the road.

http://www.hdiesel.com/C/CP3HighPressurePumps/289