ok my friend has a 1992 civic lx sedan. he asked me to do some work on it. well i started it up today to listen to it and the motor sounds fine. it spudered a little bit and the exhaust has a rich smell . he told me a shop told him that the head gasket was blown. but i think the head gasket is fine, the oil is not forthy and cloudy like it would be if the head gasket was blown, the car has plenty of coolent, and ther is no coolent coming out the tail pipe or even the smell of coolent coming out. which leads me to think that the head gasket is ok but i do think that it might running rich. could that make it spuder? dose anyone have any ideas on what could be wrong?