My buddy has a 93 Geo Tracker 5 speed manual. It starts right up and idles fine. While in neutral and you give it throttle, it will rev up fine then go back to normal idle, no issues at all. The only problem is when you’re driving it in 2nd gear and up, when you give it throttle more than halfway, it will start to spit and sputter and sometimes stall out. Today we cleaned the EGR valve, which didn’t help. He recently replaced the fuel pump, fuel filter, and the spark plugs. None of those helped either. Air filter is clean, and the catalytic converter and muffler are chopped off. He said it was running flawlessly a few months ago, then he let it sit for a while, this is when he started having issues. Anyone else have this problem? Any insight would be greatly appreciated, thanks guys!