knock retard help

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11-04-2003, 07:39 PM

818camaro95

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knock retard help

I'm getting 4 to 10 degrees of knock retard on my Scanmster @ WOT after I seafoamed the engine. I have no clue what's causing it?

11-04-2003, 08:26 PM

Josh-'04 GTO

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Well, you didn't include a sig or any info whatsoever about your car. My crystal ball is foggy today, so some info about your ride/mods would be a good start.

11-04-2003, 08:33 PM

818camaro95

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Location: I spun my muffler bearing

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Flowmaster exhaust
Hooker longtubes no cats
A4
New OVC wires
New opti
New plugs

Nothing major

Anything else

11-04-2003, 09:07 PM

speed_demon24

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Do you have an LT4 KM?

11-04-2003, 09:16 PM

818camaro95

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Yes I have LT4 KM. Forgot to add that.

11-04-2003, 09:20 PM

OBE1 95Z28

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Run it with race gas to see if the knock goes away; if it doesn't then you've got false knock. Brett Fraker's website has a link to installing a knock desensitation circuit to help with false knock.

11-04-2003, 11:26 PM

818camaro95

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What if it's real knock? What would be causing it?

11-05-2003, 07:09 PM

818camaro95

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11-06-2003, 02:29 AM

HungryT/A

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Quote:

Originally posted by 818camaro95
What if it's real knock? What would be causing it?

If you are running the stock pcm tune, there's a minimal chance that you are facing a real knock issue.
Anyway, a knock will occour with a lean condition and/or excessive timing advance. Theoretically, if you have bad plugs/wires, or suffer from lean condition (fuel pump/filter/pressure regulator/injector failure) you could be detonating.
Good luck