Pinging/detonation ??

[Deadstockpomp]

I’m at 10k miles now. Still seems if I accelerate hard, less than or wot can hear a brief rattling/pinging that then goes away. Using 93, trying different stations now, Running Amsoil pi every couple thousand miles, going to start using the Amsoil upper lubrication every fill up which they recommend. Starting to think these high compression engines would do better with a pro tune over a factory tune. Maybe it’s the injectors dumping fuel I’m hearing. I don’t know. Maybe someone with a 6.2 can romp on it and let me know. If I go wot it usually dosent do it as much but anything less than wide open throttle you can hear it. It’s like it doesn’t downshift enough and puts to much load on the engine. Almost like in a manual car not being in the right gear. Would a colder plug help this type of engine?

Edited November 7, 2022 by Deadstockpomp

[GMCustomerService]

2 hours ago, Deadstockpomp said:

Update: I’m at 10k miles now. Still seems if I accelerate hard, less than or wot can hear a brief rattling/pinging that then goes away. Using 93, trying different stations now, Running Amsoil pi every couple thousand miles, going to start using the Amsoil upper lubrication every fill up which they recommend. Starting to think these high compression engines would do better with a pro tune over a factory tune. Maybe it’s the injectors dumping fuel I’m hearing. I don’t know. Maybe someone with a 6.2 can romp on it and let me know. If I go wot it usually dosent do it as much but anything less than wide open throttle you can hear it. It’s like it doesn’t downshift enough and puts to much load on the engine. Almost like in a manual car not being in the right gear. Would a colder plug help this type of engine?

This is certainly not what we like to hear, Deadstockpomp.  Please know, customer satisfaction is extremely important to us. Our team would be more than happy to take a closer look into the concerns with your truck. To do so, please send an email to [email protected] with ATTN: Deadstockpomp/GM Trucks in the subject line.

Please include your contact information, VIN, a brief description of your concern, and the name of your preferred dealership. We look forward to hearing from you. To learn more about GM’s privacy policy, please visit https://www.gm.com/privacy-statement.html.
 
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[s10dragracer888]

On 11/7/2022 at 8:11 AM, Deadstockpomp said:

I’m at 10k miles now. Still seems if I accelerate hard, less than or wot can hear a brief rattling/pinging that then goes away. Using 93, trying different stations now, Running Amsoil pi every couple thousand miles, going to start using the Amsoil upper lubrication every fill up which they recommend. Starting to think these high compression engines would do better with a pro tune over a factory tune. Maybe it’s the injectors dumping fuel I’m hearing. I don’t know. Maybe someone with a 6.2 can romp on it and let me know. If I go wot it usually dosent do it as much but anything less than wide open throttle you can hear it. It’s like it doesn’t downshift enough and puts to much load on the engine. Almost like in a manual car not being in the right gear. Would a colder plug help this type of engine?

I know I’m 10 months late to the party, but my 4.3 was knocking/pinging. Try some power foam through the intake, fuel injector cleaner, and a higher octane fuel. It fixed my issue right away. Also…get a catch can.
 

valve coking on these direct injection engines is serious.