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Message: <blockquote data-quote="Cobra 427 V8" data-source="post: 231792" data-attributes="member: 6190"><p>Hi I have a 76 , you can do some Idle circuit cleaning one carb at a time , get a heat gun and warm the elbow , and remove bolts of course  , put a rag in the inlet port , now remove the mixture screw , and you will see a small brass elbow on one side of carb these come out and disconnect them from the hose , these need to be cleaned as there is  a jet in the elbow , there is a randak mod to change the jet size , but anyway clean it , now get some brake clean or carb clean and squirt it down the mixture  screw hole followed by 120psi of air , repeat x5 , if you look into the carb there is a little brass discharge nozzel make sure it is squirting out fluid,  do one at a time then set screws to approx 3 turns out , sync , make sure you have good spark,  have you lubed your advancer or checked the points/timing . I fitted a ignition relay to boost voltage to my ballast , and I removed the resistors in the replacement NGK plug boots with a bit of 4x17mm brass or similar, try all that hope this might help , also  put a bigger fuel filter on it , don't use cheap Chinese lookalike gl1000 filters . Cheers</p></blockquote><p></p>