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-   -   looking for some info (https://www.truckforums.com/forum/chevy-silverado-gmc-sierra-forum-11/looking-some-info-17685/)

Mr_Shamrock 10-13-2011 08:47 PM

No that isn't correct. If you turn the key on engine off it should go up to around 60 and not drop more than approximately 5 PSI in 5 minutes. This is just a rule of thumb so if it drops a little more I wouldn't worry, but down to zero isn't right. Is this when trying to start it or just with the key on. It could be bad regulator, pressure valve in the pump, or leaky injectors.

NullHead 10-13-2011 11:29 PM

That'd be a heck of a leak if the injectors weren't holding pressure ...

Definitely isn't supposed to be doing that.

david06 10-15-2011 07:08 AM

It drops to zero just when the key is on. If I try to start it the pressure jumps back up to 60. I can't seem to find the fuel pressure regulator. Does anyone know where it is located? It is not by the fuel rails at all and I do not see it anywhere else.

Mr_Shamrock 10-15-2011 09:12 AM

It should be on the drivers side of the intake on the fuel rail...

http://www.saltedwound.com/wp-conten...8/dscn5186.jpg

david06 10-15-2011 05:02 PM

yea I wish it was but it isnt

david06 10-16-2011 06:07 AM

Any other ideas as to where it might be? I searched and searched but still cant find it. Is it possible that this truck just doesn't have one and if it doesn't then how is the fuel pressure regulated? Oh man this is really getting ridiculous but I will get it sooner or later. I really appreciate the help on this matter.

Mr_Shamrock 10-16-2011 07:53 AM

Well I guess you learn something everyday...

Point of No Return: Returnless Fuel Injection Systems: Underhood Service

david06 10-16-2011 11:01 AM

Thank you Mr_Shamrock that definitely explains why I couldn't find the regulator. after looking into the fuel pump further i found it is located there but now I am still stumped because I don't know why it wont start. So if you come up with any more thoughts please share them with me. Thank you

joshstover69@yahoo.com 11-01-2011 01:37 PM

lol there is a check valve in the pump also . dose it hold 50 psi running ? give or take

joshstover69@yahoo.com 11-01-2011 01:39 PM

if it only has one fuel line the reg is part of fuel pump ass.


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