Hey guys , I have a 95 Blazer with the 4.3. Randomly when i go out to start it will start up and get to mybe 3-400 rpms then just flat out die , to remidy this id have to go under the hood and turn the positive battery terminal the slightest bit and the underhood light would come back on and then it would either start or die again and the process would be repeated. When it does start though , it will have a sporadic idle and when i put it in reverse and gas it , it just flat out dies. Any help would be appreciated.

 

i would think your battery terminal or the inside of the battery terminal (on the actual battery) are corroded or broken!