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View Full Version : Sr20, wierd crud on spark plug


ultimateirving
03-25-2012, 03:28 PM
SO lately my car has been intermittenly breaking up, sputtering under boost. so i decided to take apart a few things and see whats going on with my whole fuel/ignition system. I started with the fuel rail, unbolted it, unplugged clips and turned key on to prime fuel pumpand noticed my plugs are pretty burnt up for about 3600 miles. I been running e85 at 15psi on an emance rom tune.

The first cylinder has a build up on 1/4 of the plug.http://i3.photobucket.com/albums/y70/guitarist_of_punk/DSC01584.jpg

the second cylinder has a little but not much of the same buildup. http://i3.photobucket.com/albums/y70/guitarist_of_punk/DSC01585.jpg

the third and forth look very similar
http://i3.photobucket.com/albums/y70/guitarist_of_punk/DSC01586.jpghttp://i3.photobucket.com/albums/y70/guitarist_of_punk/DSC01587.jpg

in process of taking off valve cover to verify timing is spot on.. ill let you know if i find any anomalies or causes to my poor performance

ultimateirving
03-26-2012, 06:39 PM
Fixed my issue, i basically tested everything. Took apart the valve cover and and made sure my timing was perfect. Tested my fuel rail for leaks. Tested continuity on my coilpack clips. Bought step colder plugs (BKR7e-11)gapped to .025 and installed. Readjusted tps to .45v closed. Cleaned maf with maf sensor safe cleaner. Been a real busy day.
After putting everything back together took it to 7k rpm in 2nd n 3rd. Pulled hard and smooth with no hiccups or anything. I'm quite pleased she is running very well now, and so glad because it will be just in time with summer coming up.