i have a 98 gtx fuel injected model that runs great at idle, it'll idle all day long. Now the problem. when it is under a load it will run for 2-3 minutes and then stop brrrrraaaaaaaaaah dead. It will start right back up and do the same thing over and over. I had a tester on the battery and the charging system is working...i thought maybe the battery was being drained, not the case. what would be my next step to solving this problem?? Also my gauge quit working a while back, but did not hinder performance. let me know thanks.