Ok so the carb on my truck, well Uglychevys old truck...77 jimmy...has been acting up. when it starts up it keeps wanting to die out if you dont give it gas. basically if I keep the Rpms above 1500 it runs awesome, step on the throttle and its still smooth, but if I let it idle down it will die. I have played with the idle and the airscrews are set to 1 1/2 out but it still wont run properly...now he thinks its the accelerator pump cuz hes had it go bad a few times(damn edelbrocks!!or It'llbrakes) anyways does this sound like a pump that has developed a vaccuum leak? I have also checked all the vaccuum lines too...also the distributor was kinda loose, I was able to turn it, could this be the problem too? Im not too knowledgable in the carb dept. so I need all the help I can get on this one. also will using a propane torch (no flame) work to detect a vaccuum leak at the pump?