pinging bone stock on premium?
Thread Starter
Heel & Toe
Joined: Jun 2021
Posts: 18
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pinging bone stock on premium?
I get an engine ping running 91 octane bone stock. The ping goes away quickly but its still there when I roll on the throttle pretty hard and clears up quickly. has anyone else seen this and what has been done to fix it.
Last edited by hidesert cowboy; Jun 23, 2021 at 10:10 PM.
Team Owner
Joined: May 2006
Posts: 21,473
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From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
MN6 or A6?
Temperature of the motor at the time?
Only under full load or does it ever happen from a dig or dead stop?
Have you tried a real fuel additive? Torco or Klotz or mix VP race fuel to bring up the octane to 93 or 95 to see if it changes?
Here is a good description of various reasons why pinging occurs:
https://repairpal.com/what-is-engine-pinging
You might have to have your Vette hooked up to a scanner (HP Tuners VCM Scan for a diagnostic) by a local tuner and see why it might be occurring, they can check the fuel trims and timing and make sure that everything is in order and see why it is happening, as well as see all the pertinent sensors.
More details the better -
Thanks,Matt
Temperature of the motor at the time?
Only under full load or does it ever happen from a dig or dead stop?
Have you tried a real fuel additive? Torco or Klotz or mix VP race fuel to bring up the octane to 93 or 95 to see if it changes?
Here is a good description of various reasons why pinging occurs:
https://repairpal.com/what-is-engine-pinging
You might have to have your Vette hooked up to a scanner (HP Tuners VCM Scan for a diagnostic) by a local tuner and see why it might be occurring, they can check the fuel trims and timing and make sure that everything is in order and see why it is happening, as well as see all the pertinent sensors.
More details the better -
Thanks,Matt
Thread Starter
Heel & Toe
Joined: Jun 2021
Posts: 18
Likes: 0
MN6 or A6?
Temperature of the motor at the time?
Only under full load or does it ever happen from a dig or dead stop?
Have you tried a real fuel additive? Torco or Klotz or mix VP race fuel to bring up the octane to 93 or 95 to see if it changes?
Here is a good description of various reasons why pinging occurs:
https://repairpal.com/what-is-engine-pinging
You might have to have your Vette hooked up to a scanner (HP Tuners VCM Scan for a diagnostic) by a local tuner and see why it might be occurring, they can check the fuel trims and timing and make sure that everything is in order and see why it is happening, as well as see all the pertinent sensors.
More details the better -
Thanks,Matt
Temperature of the motor at the time?
Only under full load or does it ever happen from a dig or dead stop?
Have you tried a real fuel additive? Torco or Klotz or mix VP race fuel to bring up the octane to 93 or 95 to see if it changes?
Here is a good description of various reasons why pinging occurs:
https://repairpal.com/what-is-engine-pinging
You might have to have your Vette hooked up to a scanner (HP Tuners VCM Scan for a diagnostic) by a local tuner and see why it might be occurring, they can check the fuel trims and timing and make sure that everything is in order and see why it is happening, as well as see all the pertinent sensors.
More details the better -
Thanks,Matt
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Do you have 93 octane available to you?
Thread Starter
Heel & Toe
Joined: Jun 2021
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I first noticed it running 88 octane ethanol free. I thought that’s odd to actually hear a few pings with it. It’s slightly better running 91 but still there. Car has about 35k original miles. I assume the plugs are original.
We don’t have 93 octane here because it’s not needed because of the elevation. 8t5 octane is the base fuel because of that.
We don’t have 93 octane here because it’s not needed because of the elevation. 8t5 octane is the base fuel because of that.
Burning Brakes
Joined: Jun 2015
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From: Shelbyville Kentucky
How many miles on the car? When I did a head swap on my C6 there was a good bit of carbon buildup that I had to clean off. This will increase the compression and change the octane required.
Also I've never heard my car "ping" even when HP tuners tells me there's knock. The knock sensors should detect it and pull timing before you ever hear it. Are you sure it's spark knock and not something else?
Also I've never heard my car "ping" even when HP tuners tells me there's knock. The knock sensors should detect it and pull timing before you ever hear it. Are you sure it's spark knock and not something else?
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Thread Starter
Heel & Toe
Joined: Jun 2021
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How many miles on the car? When I did a head swap on my C6 there was a good bit of carbon buildup that I had to clean off. This will increase the compression and change the octane required.
Also I've never heard my car "ping" even when HP tuners tells me there's knock. The knock sensors should detect it and pull timing before you ever hear it. Are you sure it's spark knock and not something else?
Also I've never heard my car "ping" even when HP tuners tells me there's knock. The knock sensors should detect it and pull timing before you ever hear it. Are you sure it's spark knock and not something else?
Safety Car
Joined: Sep 2013
Posts: 4,355
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From: Draper Utah
I guess the first thing to do is make sure what you're hearing in pinging.... buy 10 gallons of 100 octane racing fuel and see if the problem is still present.
FWIW: I also live at altitude, run 91 octane, and understand why 91 is equal to 93 above 4000'.
FWIW: I also live at altitude, run 91 octane, and understand why 91 is equal to 93 above 4000'.
Last edited by Iceaxe; Jun 24, 2021 at 09:53 AM.
Team Owner
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From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
So purchase either Torco, Klotz fuel additive, or VP Racing Fuel and add it to your 91 - these actually make your fuel either 93, 95. 97 etc according to the blend charts
Thanks,Matt
Race Director
Joined: Oct 2004
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I first noticed it running 88 octane ethanol free. I thought that’s odd to actually hear a few pings with it. It’s slightly better running 91 but still there. Car has about 35k original miles. I assume the plugs are original.
We don’t have 93 octane here because it’s not needed because of the elevation. 8t5 octane is the base fuel because of that.
We don’t have 93 octane here because it’s not needed because of the elevation. 8t5 octane is the base fuel because of that.
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the car only has about 35k original miles. YES the knock sensors pull timing. but I believe they are having to pull it every time. its not a bunch of pinging and it clears itself pretty quickly but its still there. its only present when the engine is at full temp.
Race Director
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Most people have had nothing but good results from NGK plugs. TR6, etc. Wondering if you had real NGK plugs, or a Chinese counterfeit......
Race Director
Joined: Oct 2004
Posts: 12,864
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Maybe try a heat range colder on plugs? Without knowing a lot of specific info, like miles on engine, how much oil use, PCV system/catch can, how much carbon in combustion chambers, etc., hard to get too specific. But generally 1 heat range colder than stock usually helps. Also, make sure to the best of your ability that you're getting the genuine name brand spark plugs you're paying for. Chinese counterfeits are everywhere, and no good way I know of to know for sure, other than buying from a respected retailer.......
Team Owner
Joined: May 2006
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From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
I wonder if it was the station that you got it from that caused some of the issues, sometimes they get a bad batch - if not then at least you have a quick fix
Below I added some extra reading for anyone who might be interested -
Here is a small bit of information on Octane Boosters:
https://www.fuelexpert.co.za/Octane-...r-Shootout.php
https://www.fuelexpert.co.za/dooctaneboosterswork.php
Fuel Additive - many of these have their PDF Blend charts that you can download (I.E. - TORCO)
https://torcoracefuel.net/collections/accelerators
https://klotzlube.com/shop
https://boostane.com/?gclid=CjwKCAjw...xoC4UYQAvD_BwE
Thanks,Matt