[JohnDubya]

I have a 92 Lumina, 3.1L with 220k-ish miles. This problem has been happening for about six months now, on and off.

When I start the engine after the car has been off for more than about three hours, I will back out of wherever I am. I then put it into drive, and when I push on the accelerator, the car starts to go, but then hesitates (very quickly...it only takes a second or so). Sometimes, it will hesitate a couple of times and then go, sometimes it will hesitate and then immediately die. It's always when the engine is cold and I am going from a standstill to go forward. Sometimes, it doesn't do it at all.

It almost seems like there may be a clog or something that starts to get caught, but then releases and allows the engine to continue. But after the engine gets warmed up (after I drive it for a couple minutes or so), it has no problems at all. I can go from a standstill, and there is no hesitation at all. I normally start my car and try to speed up quickly at the beginning to get the engine warmed up. Most of the time, this works. But sometimes, it still will die from a standstill pretty quickly after I start it.

This happened about six months ago, and I put some Sea Foam in the gas tank. It still hesitated for a couple weeks, but then stopped for a couple months. Then, just a couple months ago, it started doing it again, and it's not going away this time. What could be the problem?