Pinging above 5000rpm

scupking · May 11, 2008

I notice my car pings above 5000rpm wot. How much fule should I add in the tune above 5k?

Tim2002GT · May 11, 2008

I think your problem is more of an octane problem, not a fuel amount issue. I would try taking out a degree or two of timing and see if that helps. Or you could always run a higher octane fuel.

scupking · May 11, 2008

Tim2002GT said:
I think your problem is more of an octane problem, not a fuel amount issue. I would try taking out a degree or two of timing and see if that helps. Or you could always run a higher octane fuel.

I'm already running 93 oct. My tune is set for 93, I will try takeing out some timing.

Gearbanger 101 · May 11, 2008

What's the mileage on your car? Might be time to run a can of seafoam though it. Carbon deposits can sometimes gum things up on the top end an cause pre ignition like what you're experiencing. Pulling a degree or two of timing out of your tune like Tim stated will also likely cure your problem though.

scupking · May 12, 2008

Gearbanger 101 said:
What's the mileage on your car? Might be time to run a can of seafoam though it. Carbon deposits can sometimes gum things up on the top end an cause pre ignition like what you're experiencing. Pulling a degree or two of timing out of your tune like Tim stated will also likely cure your problem though.

I'm close to 70k. I will do the timing and see how that goes.

BurningRubber · May 12, 2008

If you are running lean a lack of fuel can attribute to pinging also.

But the first place to check is timing, as the others mentioned.

bobc83 · May 12, 2008

I am having the same problem with my tuner. Is it a diablo? I noticed it last night when racing a friend at the track for fun. This is probably stupid but I noticed at the pump now they are adding ethanol to the fuel, there is a sticker on the pumps that will say "up to 10%" and such, does that have anything to do with anything? I dunno just a thought. But I would like to hear how you came out with the tune.

hotdog71 · May 12, 2008

I have random ping about 5k also

I have tried removing timming and adding it but it also does it with the stock tune so I think its just fugered up

I am going to get it Dyno Tune and have it check out here very soon.

trinity_gt · May 12, 2008

Before you guys with K&N FIPK Gen II CAIs do anything else, you might think about replacing that intake, or at least going back to the stock setup for a test. My GT made decent power with the K&N but also pinged like crazy with it.

I've got a JLT on it now and just don't get the same rattle anymore.

scupking · May 13, 2008

trinity_gt said:
Before you guys with K&N FIPK Gen II CAIs do anything else, you might think about replacing that intake, or at least going back to the stock setup for a test. My GT made decent power with the K&N but also pinged like crazy with it.

I've got a JLT on it now and just don't get the same rattle anymore.

Mine did it before I put on the gen II. I notice it pings mostly when I have a passenger with me. If it’s just me it doesn’t seem to ping much at all.

BurningRubber · May 13, 2008

scupking said:
Mine did it before I put on the gen II. I notice it pings mostly when I have a passenger with me. If it’s just me it doesn’t seem to ping much at all.

Then you are probaly running on the very, very edge of how much timing to safley run.

If it pings with the additional weight of a passenger than it is only taking that much extra load to cause the motor to ping.

Id probaly back it down a degree or two and try the passenger theory again, lol.

scupking · May 22, 2008

Well, I did 2 things. I backed down timing by 2% from 2-7k and added 2% more fuel at WOT. She seems to like it and is running very good. I would rather have my mixture to rich then to lean.

BurningRubber · May 23, 2008

Sounds good, that will probaly take care of your issues.

My problem was I had too much spark advance and too little fuel. As in... 13.6-13.8 A/F ratio... for a long time. Yikes.

Now I can run that same timing it used to ping on since I added quaite a bit of fuel in.

Pinging above 5000rpm

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