Thread: Suddenly getting 10 degrees of KR

I have a gen5 with 3.6" pulley and my own DHP tune. My mods include 3 inch catted down pipe, front power log, and 3 inch FWI (still on l67 throttlebody). Four days ago out of the blue my car started getting 10 degrees of KR when I went WOT. I noticed that when under load (not in neutral or park) when I give it above 50% throttle I get 10 degrees of KR. Before this started happening I would get blips of about 2 degrees at WOT with 16 degrees of timing.

I have checked the spark plugs and they are all fine. Oil has 1,500 miles on it and still amber. Fuel trims are good. Any other ideas?

I was thinking would it be possible that my Catalytic decided to fail? Just thought of that possibility today.

Have a change in weather?

Yeah definitely

Originally Posted by buickman104

blue KR WOT 10 degrees of KR fail?

Story of my life.

I bought an AEM wideband Kit. I guess I should make another thread as to installing it. Just strange that is suddenly happened. That's what makes me think it might be something mechanical.

Weather has stayed constant lately. Also finished the gas I had in the tank and tried some sunoco 94 octane. No difference.

does it creep up to 10 or does it just hit 10?

^^^^ what im kinda thinking

Originally Posted by gtpsleeper

does it creep up to 10 or does it just hit 10?

It flashes like 6 degrees then 10 degrees of KR immediately.

Originally Posted by OH4CompG

My guess is your motor mount collapsed to the point of letting your DP smack your sway bar and you're getting false KR. Been there, done that

I thought about that too. Had my buddy move back and forth a few feet going from Drive to reverse. I could make out any excessive movement and both lower mounts have only about 6,000 miles on them.

I don't hear knocking, but i feel the motor bog down from pulling timing. Although I've kept my foot out of the car from fear of blowing the motor. So my driving has all been granny driving since that problem started.

Interesting.... I too am having this issue. It just happened out of the blue as well. I replaced my engine mount a year or so ago but I guess it's possible it could have issues again. It could even be the trans mount. I've felt a dp hit the sway before after I put in headers. You could definitely feel it before i flipped my sway. It vibrated the floorboards terrible. I'm curious to see what you find out. I'm gonna give my mounts a once over when I get a chance.

Although my issue seems to happen if I get into any boost above 2psi instant kr out tha wazoooo!

You both chipped your pistons.

Originally Posted by SnowFlake

If you're pulling 10 degrees of timing you'll hear it knocking.

Not necessarily. I've had a bearing going out and couldn't hear the 15 degrees from that. Sensors heard it.. I didn't.

Antonio, I believe it might have to do with the warm/cold/warm/cold etc. I'm seeing it too. Haven't had a chance to address it and .... I don't have a chipped piston. It's in the tune from what I can see.

Yeah cuz the other day, it wasn't much colder out, maybe a few degrees colder and understand WOT, I would be at 12.4 afr but .4 degrees of knock. And at 3/4 throttle I would be at 10.0 afr. I didn't understand it. The humidity was up like crazy though.

anyway we can get a scan of where the KR issue is at? or what fuel trims are?... etc...

kinda hard to diagnose this issue from the info here but going off of what is presented Im going with false knock somewhere....

Have you checked your IPWs?

I haven't wanted to stay at WOT for too long, because of the KR, but last night I was getting about 16 for IPW at WOT.