Starting about a week ago I have started to have a pretty concerning problem pop up on my rig (no pun intended). I have noticed that when IÆm driving that I will occasionally have a backfire through the TBI, to the point when the engine hesitates and loses power (for just a fraction of a second), and then it will pick right back up. It usually happens when IÆm in too high of a gear and the engine is under a load. The funny thing is that once it happens, it doesnÆt happen again when IÆm driving. Any thoughts on what might be the cause?

1992 Isuzu Rodeo, newly rebuilt 3.1L v6 and rear diff; clear corners, bumper and tails; Aiwa MP3 head unit; Infinity Perfect 10.1 sub; Polk seperates; Sony cross and amps.
Next projects -- New paint, tint, billet grill, nerf bars.