Abnormal amount of KR

**jeannelle101** · 03-14-2016

So I have just put on my 3.4" pulley, and I got a tune. The problem is that when my tuner was going at it, he could not possibly get the knock retard down. at full throttle I have almost 13-16* of it. When he showed me, the supercharger was whining and then the whine would suddenly become quieter as if there was a lack of fuel. He suggested to buy a new fuel filter, then also change the spark plug wires. I'm waiting on the wires but just wanted to see what you guys thought of this predicament

**Fivefingerdeathpunch** · 03-14-2016

Any other mods and what vehicle is this?

**Scottydoggs** · 03-14-2016

not seeing a scan, who knows. thats a lot of kr.

you got headers on it yet? if not you want them asap or take the pulley off.

fuel pump could be bad, your guy should have tested the pressure at the rail.

was this a dyno shop with a wideband? or a local with a tuner/ pal?

**jeannelle101** · 03-14-2016

I've got a custom intake, obx headers, 3" exhaust down to the the y-split then 2.5" to the mufflers. it was a local friend that has been tuning the 3800 for 12 years too. Narrowband I believe. It is a 1997 GTP

**Fivefingerdeathpunch** · 03-14-2016

I'd be curious if it's going lean on you. A wideband is a must in my eyes, I don't trust narrow bands for anything but idle and cruise situations.

**Scottydoggs** · 03-14-2016

if you can get some screen shots of the scan it may help. hard to say sitting all the way over here lol

**jeannelle101** · 03-14-2016

He set it at runnning 17% rich to try and combat it

**jeannelle101** · 03-14-2016

This was on saturday, so I dont think i can get a screen shot of it. Sorry

**Scottydoggs** · 03-14-2016

whats your wot timing?

17% is flooding it, and its not working either.

whats he using to tune with? hp, dhp?

**jeannelle101** · 03-14-2016

The timing is super frickin low.

I believe he uses hp i just asked him now

**Fivefingerdeathpunch** · 03-14-2016

Originally Posted by jeannelle101

He set it at runnning 17% rich to try and combat it

In tuning jargon that means nothing to me. Say it's set to run rich by a percentage is not correct really. There is a set AFR that you should be commanding while in performance enrichment, like say 11.0 or 11.5.

If you have a target AFR and the wideband is saying otherwise, it needs to be corrected. Say it's on the lean side of 11.0, it might be running out of fuel. That can be confirmed by dropping fuel pressure or having the injector duty cycle over 90%.

If it's on the rich side, then fuel needs to be removed via the MAF table. It needs to be scaled back to tell the computer that it's really not pulling in that much air and needs less fuel.

**jeannelle101** · 03-14-2016

DHP sorry

**Scottydoggs** · 03-14-2016

Originally Posted by jeannelle101

The timing is super frickin low.

I believe he uses hp i just asked him now

super low means nothing, stock should be 16 ish

**jeannelle101** · 03-14-2016

I'm still learning someof this stuff sorry. but the timing is set to 5-7* I believe.

**Fivefingerdeathpunch** · 03-14-2016

Timing will be low if it's showing that much knock.

Not to say this tooner doesnt know what he's doing, but I'd be concerned if he really set timing to that low of the number. That's just going to hurt the engine.

**Scottydoggs** · 03-14-2016

Originally Posted by jeannelle101

DHP sorry

id be happy to look at your bin you can email it, i use dhp myself.

**Scottydoggs** · 03-14-2016

Originally Posted by Fivefingerdeathpunch

Timing will be low if it's showing that much knock.

like zero lol

when i was stock i had 8º kr and showed like 5 degrees timing lol

**jeannelle101** · 03-14-2016

I dont have the hardware or programs to get to it. sorry guys. It may just be a needle in a haystack

**Scottydoggs** · 03-14-2016

your friend has it on his laptop. have him email it to you, you can email it to me. if i see some thing messed up i can fix it and send it back to you.

then he re flashes the new bin. pretty painless. ive done it for many guys here.