Hey guys,
I have been reading all the topic you talk about, I have learned alot on here about my truck, so now i have a problem and need help with it.
I have a bone stock '00 silverado with a 5.3, it starts great when its cold, but once its up to operating temp, it cranks and cranks at then it will fire, but normally stumbles and then kills, then if you start it again, it will stumble, but normally it smoothes out, and runs ok. It does seem that the truck does'nt have all the power that it use to , it only has 59,000 on it. I need some help


Once i get it running, i plan on getting a nelson tune and and other performane goodies

 

have you ever changed the fuel filter?

 

I have changed it about eve 15,000 and I did just change it

 

it sounds like a fuel delivery problem. try leaving it with the key on for about 15 seconds which will run the fuel pump then try starting. if it starts right up then you have a blockage or something in the fuel system. I don't mean to offend but are your sure you have the fuel filter in the right position. they are designed to flow one way.

 

I am pretty sure the arrow is pointing in the right direction. but i will check it out . any other ideas ?

 

I had the same problem with my truck, turned out to be the fuel pressure regulator. Pull the vacuum hose off of the regulator, if fuel comes out, it's shot. The regulator is located in the center of the driver's side fuel rail, held in with a clip. I'd almost bet a case of beer that that's your problem. The part is about $60 to $80 at the dealer.

 

I pulled the hose off, and a little bit of gas came out,, hummm.. this is interesting ! and im assuming that this is also hurting my performance?
is this a common problem with these trucks?

 

Very common. It definitely can't be good for fuel economy. I think you may have found your problem. I'll cross my fingers for ya.

 

Man i have the same problem and i have been trying to figure it out for about a year now.

Truck starts fine in morning, drive to work, park it, Start truck up at lunch time and it cranks over like 10-15 times before it starts. heres what i have done.

change fuel filter
installed new FPRegulator
changed out vacumn hose


the weird thing is i pulled my vaccum tube off several times and never found a drop of fuel. WTF????

 

I was just about to post this very problem I have been having....will check the regulator here in a min and see if that is what it is. Funny thing all of ours in this thread are 2000s.