Build Thread?

[GunMetalGrey]

I said I shouldn't look in my motor, but when I changed plugs (another step colder) I looked at the pistons and 1-5 looked good. Cylinder six looks as follows.

Breakup is still happening with the new plugs. 
Full boost is okay up to redline but full throttle is not. Not sure what the heck is going on, tried adding timing, removing timing, adding fuel, removing fuel, plugs, and reworking some grounds and it doesn't seem to have changed any. I'm thinking of changing the injector and maybe coil pack, but beyond that I'm running out of ideas other than building a new harness to ensure it's not something with that. Going to post over on the MS forums to see if anyone has insight as to what's going on.

[Jdesign]

Mess with the TPS at all? If its out of range at WOT could that be the issue?

[GunMetalGrey]

Jdesign said:

Mess with the TPS at all? If its out of range at WOT could that be the issue? 

TPS reads fine, and from all that I know there is nothing that uses WOT as a modifier.

[Daggerty]

May just be weak coils and the spark isn't strong enough under high boost. You could try dropping down the gap some more to see if your issue is in spark power.

[GunMetalGrey]

Daggerty said:

May just be weak coils and the spark isn't strong enough under high boost. You could try dropping down the gap some more to see if your issue is in spark power.

I knew that would come up, but I can hit full boost, it's full throttle that gives me problems. Plan is to switch coils (seems odd but worth a shot at this point)
I'm plugs at .018" and it made no difference from .023"

[B C]

I cant remember if it was you or someone else, but did you get rid of the MAP based accel enrichment and run 100% TPS based yet?

MAP based is some bullcrap

[GunMetalGrey]

Snap said:

I cant remember if it was you or someone else, but did you get rid of the MAP based accel enrichment and run 100% TPS based yet?

MAP based is some bullcrap

Twas I, but accel enrichment doesn't appear to be a factor in the issue. It's not active when the issue happens, nor does it not happen when it is active.

[Daggerty]

Voltage breakdown occurs under pressure and is even more pronounced when a gas is involved, like the fuel vapor being sprayed in the combustion chamber.

[Daggerty]

So under part throttle full boost it is fine but at full throttle when more fuel is added that may be where the spark is leaving. 

If your harness for the coils is in a area where it is getting hot, obviously it's in the engine bay, but a long amount of the harness. With more heat and wire there is more voltage drop so the coils might not be getting the power they need.

[GunMetalGrey]

Daggerty said:

So under part throttle full boost it is fine but at full throttle when more fuel is added that may be where the spark is leaving. 

If your harness for the coils is in a area where it is getting hot, obviously it's in the engine bay, but a long amount of the harness. With more heat and wire there is more voltage drop so the coils might not be getting the power they need.

I am running MS3x so it is a MAP based fuel and timing setup, so there is no difference in logs between partial and full throttle when at full boost. 

I typically run the beauty cover with heat shielding, but haven't looked too much at other wiring to ensure that it doesn't get too hot. Certainly something that I should look at.

[patsbimmer1]

Sounds like you need... a temp gun!

[Daggerty]

GunMetalGrey said:

I am running MS3x so it is a MAP based fuel and timing setup, so there is no difference in logs between partial and full throttle when at full boost. 

I typically run the beauty cover with heat shielding, but haven't looked too much at other wiring to ensure that it doesn't get too hot. Certainly something that I should look at. 

Is it using rpm also?

[GunMetalGrey]

Daggerty said:

Is it using rpm also? 

Yeah for sure, I have a clean rpm signal throughout the rev range.

[Jdesign]

Man I cant wait to see if you figure this out.

[straight6pwr]

Jdesign said:

Man I cant wait to see IFyou figure this out. 

ooph.

[Daggerty]

Take it to the dealership

[Daggerty]

I wonder if there is a coil booster or something of the likes, it would suck to buy a 1,000 dollar msd ignition sustem.

[B C]

Drop some logs in my inbox broheim

-a guy who is attempting to help however he can remotely from New Deutschland

[Jdesign]

Well I have a different motor, but seem to be having the same problem. Im sure its dumb simple once you figure it out. Its just figuring it out, sucks.

[GunMetalGrey]

Well, it was frustrating as hell while it lasted. 

I had reworked a few things after realizing that my main ground wire was nearing 300 degrees, and this helped clear up some of the timing issues I think I was having. I went out for a cruise and it felt smoother after the car warmed up, but I was still getting breakup and I held it for a second then it reeked of oil. Took it back to the shop knowing what was going on. Confirmed it when I pulled out the coil packs and had fresh oil in the plug wells. 
She done.
 

Turbo setup is accounted for and will not be returning to anything I own. 

Started tearing it apart right away, and will be throwing rings at it again and just running it NA.