I've got a very odd problem (93 Del Sol Si). After filling up my car literally died. It took about 2 minutes to get it running, and even after that if you gave it any gas it would sputter real loud, almost back fire, and die again. I put some dry gas in, and the next morning it was working well enough to at least start and drive. The sputtering part still hasn't gone away though. Very randomly the engine will blip like it's cutting off fuel. The odd part is that this only happens after the engine has reached normal operating temperatures (about 10-15 minutes after I start driving). I've tried replacing the spark plugs, distributor cap, putting in fuel injector cleaning, and resetting my ECU, but nothing has helped. Any ideas?