940 16 valve
Member
- Joined
- Oct 22, 2005
- Location
- Calgary, Alberta
Hey Crew
The 16v turbo has been idling rough for some time. Started doing preliminary investigations yesterday before pulling the head (hopefully tonight). Compression check came up 145/150/150/150. Had a look at the plugs and thought the difference between them is pretty interesting, but I don't have a lot of experience reading plugs. I did some reading online, but I still don't feel like I have a confident idea what would explain this.
Setup is stock B234 with 16T running Fred's 16v chips @ 12lbs boost on Saab APC. green giants, stock FPR. Have been running 3" AMM which does have it a bit lean at onset of boost.
Cyl 1 is at top of image, 4 at bottom.
The 16v turbo has been idling rough for some time. Started doing preliminary investigations yesterday before pulling the head (hopefully tonight). Compression check came up 145/150/150/150. Had a look at the plugs and thought the difference between them is pretty interesting, but I don't have a lot of experience reading plugs. I did some reading online, but I still don't feel like I have a confident idea what would explain this.
Setup is stock B234 with 16T running Fred's 16v chips @ 12lbs boost on Saab APC. green giants, stock FPR. Have been running 3" AMM which does have it a bit lean at onset of boost.
Cyl 1 is at top of image, 4 at bottom.
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