As of today *** Last week, I had to move the truck from the front to the back yard.. it's been retired from daily duty.. so we thought. I backed into the intersection by our house, a car was coming, So.. I slammed the gas pedal to the floor, truck bucked, sputtered, then all of a sudden, it ran fine. No ticking, no rough idle.. no more white smoke out the exhaust. 2. Changed the oil, added Lucas engine oil additive, it helped the truck run better. 3. took the truck to the dealership for an induction cleaning. They said there was alot of carbon buildup in the combustion chanber.. ? And when we picked the truck up, My wife drove it home and she swears it drives like a brand new truck..she said it feels as if it's "BRAND NEW AGAIN".. Well.. we drove it for a couple days.. it starts ticking,but it only lasts for about 5 seconds, then goes away. A little white smoke is coming out the exhaust.. but it doesn't smell like antifreeze, smells like it's running rich. Also note.. when the plugs were changed.. we only found fouling, no antifreeze on the plugs, and no antifreeze in the oil. So I believe that eliminates a head gasket problem. Anyone have an idea what it could be? Someone said Injectors. I think that could be it. Sorry for this being so long.. but we got to figure this truck out .. or we'll trade it in on a Silverado Crew Cab HD, .. /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/thumb.gif Updated.. we replaced the plugs and wires.. it sounds like a engine starving for oil kinda noise.. when the truck is warmed up ie: driven for about 5 minutes.. the noise goes away.. <font color="red"> The truck: </font> 1999 Chevy Tahoe 4dr, 4x4, 5.7 engine. <font color="red">The Problems: </font> First off .. the truck was idling REAL rough..and a ticking noise developed in the engine compartment. Also the "Service Engine Soon" light remained on.. So the wife took it to a Friend's work.. Thanks Billy.. (REALLY APPRECIATE IT).. and it was hooked up to a diagnostics machine.. Said the spark plugs were bad.. We replaced the plugs... <font color="blue"> And the spark plug wires.. </font> the idle is great, but the ticking is still there.. it goes away when the truck is warmed up. Could it be bad oil? it's hard to pinpoint where the noise is coming from exactly.. Oh.. and the service engine light went off for a short while after replacing the spark plugs, but has since came back on. Anyone run into this problem? and idea's on another "fix" solution? Aside from getting rid of the Tahoe !!!lol..