Major tune issues

[GMCtrk]

Just put a mechanical gauge on it today.

It reads 55 psi with the key on, engine off. 49-50 psi at warm idle, and 58 psi at WOT. It's a return style fuel system.

[GMCtrk]

Im attaching a copy of logs as well as the tune. One thing I've noticed through all of this is that my KR always comes on between 3800-4100 rpms.

[Mr. P.]

On your log, does the KR look like a sawtooth pattern (a bunch of repeated spikes) or like a plateau, or a single 'attack' of KR that smoothly decreases to zero?

Mr. P.

[GMCtrk]

mostly sawtooth

[Chuck L.]

Truck intake?
Any leak at the intake where the MAP sensor plugs in?
U using the stock crankcase venting?
Any leak at the plug, upper dr side rear of the intake?

[GMCtrk]

Nope, no leaks. I put on a whole brand new intake and everything (fuel rails, injectors,etc) like 2 weeks ago. I use a catchcan with the normal routing from the driver's valve cover to the intake.

[Chuck L.]

Nope, no leaks. I put on a whole brand new intake and everything (fuel rails, injectors,etc) like 2 weeks ago. I use a catchcan with the normal routing from the driver's valve cover to the intake.

you have the can plumbed? There's a "right way" to do that.
Here's some "food for thot" type reading. Oil pulled into the engine will make it knock.
http://www.ls1tech.com/forums/genera...outing-ok.html

[GMCtrk]

the truck pcv setup is different than the ls1's. I've got the catchcan between the dirty side (driver's rear valve cover) and the intake manifold. It should be catching the oil. I've only had it on for a couple days now. I'll check it in a month of so and see if there's oil in it.