I have a 91 S-10 2.5L ... Truck runs for 3-4 minutes then I lose spark, fires back up then shuts back down, I thought it was a fuel problem replaced fuel pump, replaced fuel filter, tested fuel injector, it was good checked with new computer it was also good. replaced coil, cap and rotor button.. Please Help... Any feedback will be helpful.

 

you are all over the map here, whoa! is it spark or fuel? are you sure you lose spark? can you hear the fuel pump run? how long does it set before it will start again? it would not hurt to have your plug wires tested for resistance, I think autozone can test them. If it won't start for a while after it dies that second time, its a good time to check for spark. you can check at the coil, and at the plug wires. if spark is ther, but no start then shoot some carb cleaner in the intake and see if it fires. if so, you may still have a fuel issue. Check the battery for good ground, and it might not hurt to have the parts store check the fuel pump relay, although if the relay is bad, it probably wouldn't work at all.