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I am having carb problems. My first mistake was trying to check a perfectly functioning set of SU HS2 carbs with the official SU balancing tool. All I muddled with was the throttle set screws, but now, after two weeks of trying to go back to the basics, checking timing, spark, fuel pressure, etc., etc., I still have an extremely rough, irregular miss in the exhaust tone. The SU book says it is a lean mixture, but I'm here to tell you I have them set as rich as they'll go, to the point of fouling plugs and fumigating my garage! Following the book, I set the jet nuts so that the jets are flush with the piston deck. Then I get things started, warmed up, and adjust the leanness about 6 flats down so as to get the smoothest idle I can (a misnomer in this case). I just can't seem to adjust the miss out of the ignition, and I am now suspecting something else is wrong. I've adjusted the rockers, set the advance, checked the spark, and am buffaloed. My ear tells me I have an ignition miss, but WHERE!?!
If this is an ignition firing disorder, is there a test I'm not thinking of to check the spark other than what I've done, which is pull the plugs and turn the engine over to see a spark in the plug gap?
I'm all ears...
Tim C.
If this is an ignition firing disorder, is there a test I'm not thinking of to check the spark other than what I've done, which is pull the plugs and turn the engine over to see a spark in the plug gap?
I'm all ears...
Tim C.