Im having a prob in my car,when i start my car,the car suddenly starts missing like its not getting proper fuel or spark from the plug,its goes on for a while n then gets fixed by itself,then after some time it goes on again,i had its fuel filter checked,its working ot fine,had its plugs also checked they r also fine,checked air filter too n its also working fine,theres only one doubt now,i think the injectors are blocked,what do u guys think wod be the problem????