'08 engine ping

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Jan 11, 2008 | 04:04 PM

loflite

Thread Starter

Drifting

Joined: Feb 2001

Posts: 1,539

Likes: 63

From: new ulm mn

'08 engine ping

Just curious if anyone notices if their '08 engines ping. My '07 does a little and it drives me nuts. I'm running 93 octane, changed brands and been to the dealer and to no avail. Not looking for solutions, just curious if the '08 pings a little too.

Jan 11, 2008 | 04:08 PM

andreas g.

Drifting

Joined: Nov 2002

Posts: 1,651

Likes: 125

From: laguna niguel ca

If it's really pinging or knock. It shouldn't not if the knock retard is working. That's it 's job. Take it to the dealer.

Jan 11, 2008 | 04:13 PM

LS1LT1

Team Owner

Joined: Feb 2001

Posts: 27,206

Likes: 105

From: Short Hills, NJ

Quote:

Originally Posted by andreas g.

If it's really pinging or knock. It shouldn't not if the knock retard is working. That's it 's job. Take it to the dealer.

Plus the '08s have a slightly lower compression ratio (10.7:1 versus the LS2's 10.9:1), though I highly doubt that tiny bit would be enough to have one detonate any more/less over the other.

Jan 11, 2008 | 04:13 PM

timd38

Race Director

Joined: Aug 2005

Posts: 13,592

Likes: 187

From: Hudson WI

NCM Sinkhole Donor

Quote:

Originally Posted by loflite

Don't laugh, but could it be lifter noise?

Jan 11, 2008 | 04:15 PM

Hooked4Life

Pro

Joined: Mar 2007

Posts: 514

Likes: 31

From: Corinth, TX

My 07 would have occasional knock on the stock tune with 93 octane. I tuned it out with HPTuners.

Jan 11, 2008 | 04:43 PM

loflite

Thread Starter

Drifting

Joined: Feb 2001

Posts: 1,539

Likes: 63

From: new ulm mn

It's definitely a ping. Again, not really looking for a solution because I don't think there is one without getting a tune or replacing the car.

Just curious if the '08s ping too.

Jan 11, 2008 | 05:46 PM

carpe dm

Le Mans Master

Joined: Oct 1999

Posts: 8,205

Likes: 40

From: Tucson AZ

You might want to try a decarbonization procedure just in case... won't hurt to try.

Jan 11, 2008 | 06:02 PM

Silverspeed

Team Owner

Joined: Jan 2007

Posts: 22,136

Likes: 23

From: In the woods looking for my thrown putter.

St. Jude Donor '13, '15

Quote:

Originally Posted by loflite

It's definitely a ping. Again, not really looking for a solution because I don't think there is one without getting a tune or replacing the car.

Just curious if the '08s ping too.

??????? Why do you think there isn't a solution? A stock 07 should not ping on 93 octane gas......period. 91 shouldn't ping either. Try a new dealer. If they can't fix the problem have GM replace it.

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Jan 11, 2008 | 06:19 PM

loflite

Thread Starter

Drifting

Joined: Feb 2001

Posts: 1,539

Likes: 63

From: new ulm mn

Quote:

Originally Posted by carpe dm

You might want to try a decarbonization procedure just in case... won't hurt to try.

Tried chevron cleaner with techron. Did help a little. The reason I say there is no solution is that the pinging is minor and is compensated for by the computer very quickly. That is normal within specs even according to the owners manual. BTW, silverspeed, every '07 I've ridden in or driven which is boxstock pinged occasionally. My older vettes never, ever pinged. Unfortunately, I've got really good ears.