Knock all the time at hi RPM

[odd boy]

Hi,

I am trying to remove the knock from Camaro 98. I haven't tuned the AFR or the spark deg and it does a lot of knocks at high RPM. Then I pulled some deg but the power become less and the knock still there, even I tried to put more fuel (11.2) and nothing happened more than power loss.

Please note that the fuel pump was checked and found K.

[joecar]

Check:
- engine coolant temperature;
- carbon deposits;
- spark plug gap;

Try higher octane (100+ unleaded) if available, to see if knock stops.

You said you tried reducing timing and richening the AFR (what does wideband indicate...? Or, what do HO2Sx1 voltages show...?).

Post some log files (include DYNCYLAIR_DMA)... does KR have a sawtooth pattern...?

Also diagnose the knock sensors (see if they produce a signal when they shouldn't)...

Can you audibly hear the knock...? Are you sure nothing is virbrating/banging triggering the knock sensors)...?

Is the KR always 4 degrees, or does it vary...?

[Stealth97]

What is the compression ratio? Stock or heavily modified?

[odd boy]

Check:
- engine coolant temperature; Checked, okay
- carbon deposits; Checked, okay
- spark plug gap; Checked, okay

Try higher octane (100+ unleaded) if available, to see if knock stops. Will do and get back to u

You said you tried reducing timing and richening the AFR (what does wideband indicate...? Or, what do HO2Sx1 voltages show...?). WB reads 11.7 then I put more fuel up to 11.2

Post some log files (include DYNCYLAIR_DMA)... does KR have a sawtooth pattern...? Will do and get back to u

Also diagnose the knock sensors (see if they produce a signal when they shouldn't)... Will do and get back to u

Can you audibly hear the knock...? Yes I do Are you sure nothing is virbrating/banging triggering the knock sensors)...? Checked and found okay

Is the KR always 4 degrees, or does it vary...? Will do and get back to u

Thanks

[odd boy]

What is the compression ratio? Stock or heavily modified?

stock compression, and only LS6 mainfold, pulley, cat back and headers.

[mr.prick]

97-98`s are notorious for they`re knock sensors.
You may want to get some new ones.

[odd boy]

but I hear it

[mr.prick]

WOW
Got a log?

[odd boy]

will do tonight

[joecar]

Oh, also check for oil ingestion thru PCV plumbing (look inside intake manifold for oil pooling, and behind throttle blade).