well..ive had this valve clicking issue for a while now...ive done an adjustment myself and professionally..and still clicking..the noise goes away for the most part when the car is warmed up COMPLETELY...also...my exhaust hick ups at idle...and each time it does..the motor jerks slightly...(rear mount is bad, so that might be it) also..i hear backfire each time i shift...sometimes its loud..sometimes not..the car doesnt seem to have any loss in power..what do you guys think?

 

Compression test will end the guess work.
Glenn