That's one of them. There are two. They're both on the side of the head under the distributor. One is for the gauge, and one is for the ECU. I'm foggy on which is which. Start the car and disconnect one at a time while someone watches the gauge. If your car shuts off, that's the one for the ECU... I think the one for the gauge only has 1 wire.

How's your coolant level? Low coolant can make your car run like crap or not at all.