dirienzojoe

i have a 2000 silverado with 80,000 truck is running rough i changed engine oil spark plugs plug wires and fuel pressure regulator truck is still running rough any suggestions

SweetEmotion

Is it running rough just at idle/accelerating/etc. or all the time? Any engine lights on? Which motor do you have?

dirienzojoe

i have the v8 5.3 no lights in dash are on it only seems to be running rough when its idle i can feel the vibration in my feet sitting at the red lights or parked i was thinking it could be i need to clean out my throttle body or possibly water in the gas tank what do u think

SweetEmotion

I ve riddin in other 5.3 silverados that feel the same way. Cleaning throttle body can only help. Doubt theres water in gas tank. Try running some sea foam in gas tank, that will remove any moisture, and clean your injectors. Without feel your vibration its hard to say but maybe nothing at all. Your timing may need to be adjusted?

oldchevy

Check for vacuum leaks.