Alan King

iTrader: (2)

I have a 2002 LS1 and I am getting a crackling sound at high rpm's. I dont think it is detonation because my a/f ratio is right on the 13 mark all threw the rev range on the dyno sheet. If anybody knows what this is or has experienced it themselves please post what you think. Just need to know if it is a common thing or a problem that needs to be fixed.

Visceral

iTrader: (1)

You can have 11:1 AF and still detonate if your timing advance is too great. Theres alot of variables folks would have to evaluate before we could give you any clues. Mods, tuning, etc.

chris

JeremyF

iTrader: (23)

True, too much timing advance is always more of the culprit rather than being a bit lean when it comes to detonation. Grammer is bad really tired

Jeremy Formato

wrencher

iTrader: (2)

You need to log the PCM data on a run & check it over & see if your problem shows up there.

Alan King

iTrader: (2)

i only have a lid, exhaust MSD spark plug wires and double platinum NGK plugs. i havent messed with the timing at all. I have a OBD 2 scanner would that tell me if i am detonating when i do a run?

CAT3

iTrader: (9)

Dble pltnm plugs suck.

Check to make sure your wires are on tight, double click on the coils, and fully seated on plugs.

Look at timing, over 29* is not normal, as thats stock. KR will tell you tell you how much Knock Retard you are getting.

I would say swap out the plugs and try NGK TR6 as they are a step colder plug and help a lot of people out that have det, issues.

chevyz2801

iTrader: (20)

im getting a funny sound that starts around 4,800 till the trany shifts about 5,500 to me it sounds like a valve spring getting weak and my car is stock with 58000miles what do yall think

Stroker2112

I have the same crackling noise at WOT ...not sure what it is....I'm currently swapping out intakes and hope it goes away after the new setup is in place...

Stroker2112

99firehawk

iTrader: (1)

Ive got the same issue, it just started happening recently.
I also am getting 4% KR (WOT).
I am replacing the knock sensors next week, we will see how that goes.