Engine Ping

[danno5069]

i have an 05 1500 sierra 5.3 litre, when i start it, it pings when initially starting, any suggestions? it has 48000 miles

[Draenor]

Are you getting a check engine light? Pulled any DTC's?

[danno5069]

Are you getting a check engine light? Pulled any DTC's?

 

No, can the timing be off? If so can it be adjusted or is it controlled bt the computer.

[slimjim2525]

Timing is controlled by computer. Try a higher octane gas, and run a little experiment.

[Draenor]

 

Another thing, are you sure its not a knock? It would sound like a diesel truck, and the knock only last a few seconds to a minute. If so you may have CSK(Cold Start Knock). or commonly piston slap. Do a search, its been discussed a numerous times and is common, but I assumed the problem was corrected by the '05

[2000DV4.8]

One thread wasn't good enough...?

 

http://www.gm-trucks.com/forums/index.php?...c=79348&hl=

[danno5069]

 

Another thing, are you sure its not a knock? It would sound like a diesel truck, and the knock only last a few seconds to a minute. If so you may have CSK(Cold Start Knock). or commonly piston slap. Do a search, its been discussed a numerous times and is common, but I assumed the problem was corrected by the '05

 

No, it happens as soon as the truck starts, a couple of seconds and then it stops, its a knock or a ping, same thing arent they, if it was supposed to be corrected, was it doing harm, and can GM rectify problem, still under warranty.

[slimjim2525]

Knocking and pinging are not the same. Knock is usually referred to as cold start knock. It starts when you first start the engine cold, and lasts a few seconds then goes away. This sounds like what you have, and is normal. Pinging refers to pre-detonation of the gas, and usually requires you to go to a higher octane, which burns slower.