Getting lot's of KR under light load to heavy load, when manifold vacuum is high.
2004 colorado V8 swaped in.
My engine is a early 2007 4.8L LR4 cast iron block. Stock small duration 4.8L camshaft.
-Long tube 1 3/4 tube headers
-88mm SSR throttle body
-LS2 intake, fuel rail
-Full size pickup cold air intake (works more like a hot air intake) IAT temps over 114 at idle
-stock 2007 4.8L 24 lb'hr injectors.
2006 6.0L SSR E40 PCM, and LS2 knock sensors.
91-92 octane Gas
I changed the engine displacement, uploaded the smaller injector info, and turned of a bunch of DTCs that were not needed. Wired O2 sensor heaters on allways. For futre reference we will call this the stock tune.
I tried tunning the VE table, MAF table using my wideband, but I see I am getting KR. So I put the stock tune back in, and still get lot's of KR.
I also tried copying over the spark tables from a 2004 LR4 manual transmsison pickup, still got KR. Then I reduced the problem area cells by 5 degrees, and still get KR What the hell??
Can I use the histo I posted to correct timming? By copy and paste subtract?
What should my timming tables look like? Am I just getting false knock?
The tune is for a alluminum block motor, I am running a cast Iron block, do I need to desensitize the knock sensors?