This car drives great and gets good mileage when fully warmed up. When cold starting, you must hold the throttle to the floor and keep holding it until the engine revs up, then feather the throttle to keep it running. Lots of black smoke initially then it clears up. After the idle drops it tries to stall and if I am not feathering the throttle and it does stall, it is nearly impossible to restart. Smells very gassy when this happens. I'm assuming the throttle body injector is leaking. Or if this model (700) has a cold start injector, then IT is leaking.
Once warmed up the car drives normally and starts easily. Check engine light goes off after 5-10mins of warm driving. Trouble code is 15, coolant temp sensor reads too low, yet engine runs at normal temperature and sensor is new along with radiator, water pump, all hoses, thermostat, etc...
Does the model 700 TBI unit have a cold start injector, or just the one big one?