Truck is losing power, begins running stutteringly?

(2011-06-13 14:20:24)

1. Kevin Says: Hi!
I have a 2000 chevy silverado, I believe its the 2500(3/4 ton) model, V8 and is NOT a 4wd model(apparently they're pretty rare)
When it's first started, It idles fine. As soon as I start driving, it kind of seems to struggle and stutter for maybe a minute before it decides to work alright. It doesn't seem to have a lot of power for a V8. It struggles to pull small trailers, and even itself up some steeper hills. I removed the intake hose that comes from the air filter today to find the inside of the throttle body coated in gunk. I shall be cleaning it all out today. Could this mean that the valves are loose, thus I lose power? After they heat up, the metal expands, and they connect properly could explain why it only struggles for so long.

I have recently changed the spark plugs, and wires. Coils seem to be working alright, all cylinders are firing.

Should I try tightening the rocker arms a little? I hope that cleaning the throttle body and sensors out will solve this problem completely, but it's a long shot. As far as I know, it's never been done on this truck. I'm developing my mechanical skills, and just wanted some input on this. I'm no expert(yet :D )!

Thank you in advance for your opinions,
will provide more info if needed.
Kevin

2. Pete M Says: I like to try the least expensive fixes first:

Check out your Exhaust Gas Recirculation (EGR) and Positive Crankcase Ventilation (PCV) valves.

You can also check your Throttle Position Sensor, and Idle Air Control.

See links below for detailed information:

3. Skeeter B Says: start with the cheap repairs first i would change the fuel filter first