miche25

Hello, I have Corvette 2008 C6, 60,000 Km., 91 octane, since 2-3 weeks my engine ping in the acceleration(time :1 sec. average) I tried with 94 octane + boost octane Lucas, my engine ping again. I have check my spark plugs, the air flow sensor, the air filter, It's good. What should I do ?

Gearhead Jim

(No info in your profile)

Is the car stock, or some mods?
Any previous issues that might be related?

miche25

In 2012 April, I have installed a camshaft, and throughout this period I did not ping. Is it possible that the drop in temperature.
(Weather: 68 F) can affect ?

l8-apex

Take it to a good tuner and have it dyno-tuned. I have a 2006 that had an A&A supercharger kit and a cam installed before I bought it. It had some minor pinging at low RPM under throttle, so I took it to a local tuner with a great reputation. 3 hours later it was smooth as butter and picked up 30hp as well.

Gearhead Jim

My experience has been that pinging is more common in hot weather than cold, but with the cam and tune then I don't know.

Gabbiani

Could still be tune - if it was tuned on a hot day without adjusting the IAT Spark table then the cooler air could be easily adding 6-10 degrees of timing.

Seen it several times - tuner puts too much timing in the main table to compensate for the other adjustments but doesn't consider other weather conditions.

haljensen

If the OP is from anywhere other than North America there could be a misunderstanding about Octane numbers.

RON is Research Octane MON is Motor Octane
The US uses RON + MON divided by 2 to equal reported Octane.

Research Octane number alone is used in many places other than the US. The RON is usually 10 points higher than the MON so other countries Octane is 5 points lower than US reorted Octane.

His 94(RON) might be our 89(R+M/2)?

CMY SIX

tune it to your 91, if it's stock it's been tuned for 93, I had the same problem

ls1121

I was thinking that also with the way he worded his questions.

TTZ06VETTE

Pinging should result in an automatic change to the low octane timing table which if left stock should eliminate or reduce the pinging. Many tuners however make the low and hi octane tables the same which could cause a problem when using less than ideal octane gas.

miche25

I intend to change the nock sensor soon, is it a good idea or it is money and time wasted?
Asked here in Canada $ 1,000. for a tune, it is expensive for a timing!
Thank !

TTZ06VETTE

For half that price you could buy HP Tuners and tune yourself. Once you run a scan and identify where the pinging is occurring it is easy to adjust the timing tables. Forum can provide help.

realcanuk

Stop wasting money changing parts until you know what is the cause. Where in Canada are you ?

miche25

I live in Quebec

realcanuk

In Quebec City ? I don't know anyone there but if you came to Montreal, I could hook you up with my tuner. It wont cost you 1000 bucks, that's for sure.
Unless you are planning to buy something like HPtuners and learn yourself, you need the car looked at by someone who knows what they are doing, before you damage something expensive.

0Josh@SpartanLSX

As others have stated, pinging/detonation can be fixed relatively easy with a PCM recalibration. However, timing may not be the only issue. Lean conditions can also cause detonation, and depending on the quality and grade of fuel being used in this car the Air/Fuel ratio needs to be adjusted accordingly FIRST, with a conservative timing table. Then set the timing to the vehicles tolerable range. You won't know how much timing the car really likes until the fueling is right.

Any competent tuner will know this stuff and get you squared away.

1972.spitfire

Hopefully get the. Car back from the shop today finally getting the new fuel injectors done

1972.spitfire

Picked up the car yesterday .took if for a drive new fuel injectors. They also cleaned out all the carbon in the plenium. Throttles response is awesome it squaks in first and second . goes real nice and smooth .