So I Found The Problem

[banshee04]

So one day I decided to rip on the car a little bit and all of a sudden it started putting on a smoke show and missing. Well I parked it for about a month and just now started tearing it down.

The car was on E-85 with a 16g with about 25psi. I was shocked when I saw this considering I was on E. Looks like there were some problems somewhere else.

Here is what I found.....

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[magik95]

Ooohh damn!!!!!!!!!!!!!!

 

[dsmboost84]

Whoa!

 

[Aproductions]

gnarly.

What a sick paperweight.

 

[saechao04]

Wow, did you go lean/rich? I wonder what caused that....

 

[magik95]

Seems to have gone really lean!NO?

 

[keltalon]

Do you have a wide band hooked up? And if so what type of a/f ratio were you seeing at wot?

 

[banshee04]

Do you have a wide band hooked up? And if so what type of a/f ratio were you seeing at wot?

Yeah, I have a wideband. The afr's were around 12.7 at wot.

 

[donniekak]

Yeah, I have a wideband. The afr's were around 12.7 at wot.

Some of what i have noticed. Lean afr's don't make much more power than richer. E85 has a habit of clogging injectors. So, even though the average afr over 4 cylinders was 12.7, that cylinder was probably way over 13. Now with gas, you would pick up knock before this happened, e85 is almost impossible to get knocking. Get your injectors tested, and cleaned.

 

[MichaelSuch]

Time to go forged

 

[banshee04]

Some of what i have noticed. Lean afr's don't make much more power than richer. E85 has a habit of clogging injectors. So, even though the average afr over 4 cylinders was 12.7, that cylinder was probably way over 13. Now with gas, you would pick up knock before this happened, e85 is almost impossible to get knocking. Get your injectors tested, and cleaned.

The injectors were the first thing that came to mind. I have a GVR4 and I use the stock boost gauge as a knock light. Well I remember it lighting up a couple times before this happened but I just ignored it cause I was assuming it was phantom knock and not real knock cause I was on E-85.

 

[saechao04]

hmm, was thinking about going e85 too....

 

[ziggo0]

How do the other 3 pistons look? A clogged injector, causing lean condition then...well, that - perhaps?

 

[Black95TSIawd]

How much timing advance did you have? Excessive timing past MBT can also create too much heat.

 

[banshee04]

How do the other 3 pistons look? A clogged injector, causing lean condition then...well, that - perhaps?

The other 3 look perfectly fine. The injector is the only thing coming to mind. I'm fixing to throw them on our flowbench and see what's up.

How much timing advance did you have? Excessive timing past MBT can also create too much heat.

I was around 21* of max timing, if that.