1G SUPER Knock!

[holland]

Hey everyone, I tried to post this in the "tech" forum under engine managment but it wouldnt let me.

So here's the skinny.... my car has 1000 miles on a new motor, its been running fine at 7psi... i turned it up to 14psi... still running great but after about a week of that I developed a boost leak in my BOV gasket. I needed to replace my 1G BOV anyways so I bought a new Greddy, got the new flange welded up and its ready to rock.

I started up the car, drove it down the road and it ran great at 12 psi. Today I took the car back out and drove it about 50 miles on the freeway and I noticed everytime I'd get close to 5k rpms it would stutter real bad and loose lots of power. It didnt feel like a boost leak, it felt more like the fuel was cutting out.

So tonight I plug in my laptop and run DSMLink and low and behold I'm getting knock like a crazy man! 15 degrees of knock at 4000 rpm, AF = 11.2 and the boost is at about 4psi... wtf, how the hell could I be getting THAT much knock at this low of a boost.

The motor is all new, the knock sensor is new... I'm stumped!

Here's the link file for all you fellow Linkerz

 

[holland]

Ok, well everyone.. I feel like an idiot right about now. It turns out my knock sensor was so loose it was about to fall out of the back of the engine! hahah... sheesh. So that explains the whole creeping knock thing.

I did do a boost leak test and I did find a couple leaks. Theres some pressure coming out of a sensor on the side of the TB, I'm sure its just the gasket for it. There's also some pressure coming out of my brand new Greddy RS BOV, its actually coming out of the valve. I'm guessing I have to turn the top screw toward the "hard" side more?

Here's my latest log file from last night. I'm still getting knock in the 5000 - 5500 rpm range even after I've increased my fuel and dropped my timing a grip. I'm guessing its because of the small boost leaks still?

ugh, this will never end with a dsm huh? ha

 

[olmytsi]

TOLD YA!!!!!!!!!!!!!!!!! Glad you got it figured out.

 

[holland]

TOLD YA!!!!!!!!!!!!!!!!! Glad you got it figured out.

hehe serious huh, thanx man! Now I just gotta try and get this bad boy tuned.... ugh, I wish I could find a professional tuner in so-cal!

 

[90blacktsiawd]

www.roadraceengineering.com could probably help you out with the tuning.

 

[holland]

www.roadraceengineering.com could probably help you out with the tuning.

I've talked to other people on here before about that and I've been told they dont do tuning since they dont have a dyno. Buuuut I decided to give them a call myself and was told to speak with someone specific. I gotta call them back in about 20 minutes..... I'm keepin my fingers crossed!

 

[olmytsi]

Your car is running way hot, take care of that first. I posted a more detailed post on the link forums.