1990 Mitsubishi Galant 2.0
I have a 1990 Mitsubishi Galant that has almost 300,000 miles on it. It's been one of the most reliable car I've ever owned in my 50 years of driving. I started it up a week ago without any issues. I got about 6 miles before it started losing power. I pulled over to the side of the road as soon as possible and noticed that it was surging at idle, and it then sputtered and died. I opened the hood and inspected the battery cables, coolant and looked for loose connections and fuel leaks. I then got in the car and tried to start the car. It fired right up and was running well for about 3 minutes before it started surging again. The car could not get up enough RPM's to move. Pressing the accelerator just made it surge harder and spit and sputter until it died again. I had it towed home and started to work on it. I disconnected the battery and let it sit overnight. I went out the next morning, connected the battery and it started right up and idled nicely. I drove it up the road about a mile (up hill) before it started surging again. I rolled back to my house and tried again the next morning. Same thing happened. As far as I know there is no way of doing a diagnosis on a 1990 Mitsubishi Galant 2.0, so I replaced some parts (that after 300K trouble free miles) I thought should be replaced anyway. I replaced the TPS, fuel pump and filter, cap, rotor plugs and wires, and looked for obvious signs of broken, corroded or loose wires. Nothing has changed. It starts, idles nicely and accelerates like new for about 5-8 minutes, then looses power, surges and eventually sputters and dies. Please help!