Check and make shure your fueling is correct.If your leaning out from fuel system issues, she would definitely knock.(unless this problem started right after you modded,then its more likely a tune issue.)
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10-09-2014
Check and make shure your fueling is correct.If your leaning out from fuel system issues, she would definitely knock.(unless this problem started right after you modded,then its more likely a tune issue.)
10-09-2014
Yeah white is lean... What plugs are you running?Originally Posted by grazin
10-09-2014
I was running NGK 1 heat range cooler...And I ran those far too long.. Say 60,000 or so and was seeing upwards of 7 degrees of knock then I changed the plugs out tongk tr6 iridium's.. And added plug wires and coilpacks from zzp.. Before I was running msd coils.. And also put a ported to on from zzp.. Like I said earlier in the post, car runs like new at light , half and three quarters its that damn full throttle..
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10-09-2014
Hmm. Some people have said iridiums can cause KR issues because the small point of spark can be a hotspot.. but not anywhere 7*. Wouldn't hurt to try autolite 104s tho to see if it makes any difference.
10-09-2014
Thing is I was seeing all that knock before changing the plugs..
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10-09-2014
Then you have issues else where... could be the tune if it is going super lean which is VERY bad for the motor. Otherwise its a mechanical issue.
10-09-2014
Hey man I appreciate the help.. I've got the tog headers don't know the after.armey downpipe to aftermarket cats. My o2 sensors are original and on a very hot day in stop and go traffic, I get a p0420 code..
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10-09-2014
Where would the most likely spot be for the headers hitting? The downpipe area ?
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10-09-2014
Yeah downpipe area is common. original O2's could probably be replaced, but most likely not causing all this knock.
10-09-2014
Hey thanks again for all ur help..
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10-09-2014
One more thing.. Could a bad lower motor mount cause downpipe to hit?
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10-09-2014
It could allow the motor to move more making it hit, only way to tell is get under there and look. Put it in D or R and have a friend rev it and hold the brake while you look under.
10-09-2014
Most plugs will appear white. Checking the plugs needs to be done immediately after a wot run, or it really does no good to check them.
Your tune is probably the issue you see knock. It's probably commanding too much timing.
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