I haev been noticing some consistently high knock readings just above 3000 rpm and around it. I took a look at the maps and say that at that rpm range for light to medium throttle there is very little fuel dialed in onthe base maps. Upon graphing the ign maps it bcomes really apparent how little fuel there is in that range.

that range is precisley when my knock reading reading mid 60s to low 70s. I know the stock sensor is pathetic but there must be some corealtion.

Have any of you guys observed this, and have you dialed in more fuel in that range? what is teh reasoning for less fuel around 300-3400 rpm?

 

anyone at all?. I know you guys have to know what I am talking about.

 

I noticed the O2 sensor is reading like .25-.3 volts for a second when I punch it from around 2600-2800 RPM. It sounds like in knocking. Well it did sound like it was knocking. Now my motor is dead. Funny thing about that.

Personally, I'll be dialing in a little more fuel there when I get my car back.

 

I had noticed something similar - that at 2800-3000 I would see the duty cycles match the boost level - whcich they should, until they hit about 50%, after that the duty cycles would flatline at 50% and the boost would continue to raise. No more fuel at 10 lbs than at 14. I would see this when accelerating in 5th.

I had just started to look into the maps when my car died - no I don't think this is the direct cause.

I was sort of thinking that at low RPMS when only the first set of injectors is on line maybe the PFC can only achieve a certain amount of fuel - but just the primaries would be something like 40%.