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White deposits in exhaust port, after going lean in boost.

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henrysan

Proven Member
212
24
Feb 20, 2014
wichita, Kansas
Took the car out for short drive and decided to get into boost. Car stumbled and loss power once full boost was reached so I let off, so about a second or less of it stumbling. Was not logging and did not have time to look over at WB. After I got home and hooked up the laptop I see that voltage drops to 11.5 (normally 13.7-14 at idle) once the car is running, Looks like the alternator died. Had to remove jmf manifold so I could remove the alternator and found the deposits in #4 exhaust port. The plugs look ok I think. Is it melted aluminum? What is this stuff?

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The white residue is a biproduct of combustion and is normal. What type of fuel are you running? I cant tell by the picture what the plug looks like. The car wasnt knocking?
 
Knock is set to flash cel at 1 degree timing pull, but I run e85 so it probably would not knock anyway, and did not light up cel during the very short pull.
 
Thanks for replys. I was worried maybe it was melted piston/head particles. I also found other pics on google that looked almost identical and it was also said to be fuel additive related, and normal.
 
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