cold weather knock?

[Superbee]

Hey dumb question, got a 2.0 turbo sunbird running cpde 59 on the stock 7749 ecm. is there any reason as to why i would get knock in child weather vs hot? First cold days ive had wkth this sunbird, I'm getting knock retard of less than 5 between 4-10 psi area.. I back the timing back to single digits before i get rid of most of it, which makes no power....when it was hot i has low teens and very little to no retard. Cold should have opposite effect. I dont understand. A.f is around low 11's. Is there something I'm missing?

[trippyjoey]

Have you checked for possible false knock signatures?

[steveo]

you're runnin' a bit lean (remember the colder the weather, the higher the requirement for fuel due to air density)

you have a coolant temperature vs spark table pushing timing too far

moisture is causing condensation in your distributor cap causing some fire to the wrong cylinder

just some ideas

[Superbee]

Joey, no i havent. How do i go about that.

[trippyjoey]

Here is a brief example.

http://www.zzperformance.com/blog/ab...ock-retard-kr/

[Superbee]

I just drove home and did a log, Looking at the log its still all in about the same area. Got to 6.xx degrees retard at the worst point.

A/f got to 11.8 MAX.. was generally around 11.4-11.6... I'd think that would be rich enough for it to be happy, I can always try richer?

I dont really have any coolant temp table, I have manifold air temp correction table, and thats locked down to 1.6degrees across the whole board so that table is basically inop right now untill i set it up.