It usually happens right after i shift it starts acting up (bumping ,hesitating) and it occurs after i'm pretty hard on the clutch i.e (shifting fast).But there are other times when it works fine..its very weird. I haven't checked any of the fuel items, how would i go about checking them? i got my spark plug change to bosch plat 4 about 9,000 miles ago give or take.One more thing when i get on the gas though it runs like a champ and like i stated above there are times where it runs just fine..any help will be appreciated.