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Showing results for tags 'Colortune'.
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Hi! My Subaru Loyale stw, 1987, 4x4, 1.8L with Hitachi 2 bbl carb didn't pass inspection, inspector said it was running too rich. I had rebuild carb partually earlier, replaced accelerator pump and gaskets and cleaned it with carb cleaner, after that flat spot was gone. Ignition timing is set to 8 degrees BTDC distributor vacuum line plugged and engine warm at ~700 rpms. I found Gunson Colourtune and decided to give it a try before having a mechanic to check emissions and possibly adjust carb with proper equipment. It was harder to see color differences in spark in RL than in Youtube videos, first it was strong yellowish spark and after fidding with air/fuel mixture screw it was harder and harder to see, resulting a small spot to see spark but too small to see actual color. I removed Colortune Plug as I thought it was in need of cleaning but it wasnt the case, it was just like new. I'm going to give it another try and change spark plug wires and try maybe other cylinder to see if that results stronger spark. Should I increase rpms with idle mixture screw so spark is easier to see and adjust it back to 700 rpms when done playing with air/fuel mixture or do they interact and need to be adjusted in turn? Am I just making this too difficult myself instead of dialing in initial setting for air/fuel screw, if there is such, please share =)