2000 Chevy Tahoe Stumble at start

[SSSilverado23]

I have a 2000 chevy tahoe with a 5.3L in it. It runs great but when you try starting it, it sometimes misses or stumbles and you have to try starting it again. Always starts the second time and sometimes the first time. I already changed the plugs and wires. It runs relatively smooth at idle as well. Its only a start up thing. Any help or ideas would be appreciated. Thanks

[txab]

Fuel filter

Fuel pressure regulator

Fuel pump

 

Remove the vacuum line at the FPR. If fuel is present, replace the FPR

 

Take a pressure reading. Key on, engine off. Record pressure. IIRC, should be 55-62 psi. When pump stops operating, pressure should stabilize, then remain constant. If it drops more than about 5 psi in about a minute, you've got a bad check valve at the pump. Requires pump replacement.

[SSSilverado23]

Ok cool. Thanks for the info. Ill check that stuff out. I was thinking coil packs so it looks like i was way off. Thanks again!

[SSSilverado23]

Is there anything else it would be other then the fuel stuff? Im not seeing a problem there

[jaredlucky16]

need fuel pressure numbers before u start it

[SSSilverado23]

WHere is the fuel pump regulater located on this vehicle? thanks

[jaredlucky16]

along the fuel rails i believe its the left side if ur sitting in drivers seat

has vacuum line going to it