Intermittent cold running poorlyback firing and blowing black smokeis ok once warm and doesn't happen every day.

FIRST THINGS TO CHECK WHEN YOUR ENGINE WILL NOT START an engine not starting issue at least once in their driving lifetime. It can be frustrating as it usually happens when you need your car the most.There are two different scenarios that usually occur when this trouble presents itself. Either you are driving along and the engine dies and won't restart, or the vehicle has been sitting for a period of time and will not fire up.The only problem that has a different repair set is when the car stalls while driving and then fires back up which involves an intermittent problem that can be more difficult to diagnose.

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check wire connection on throttle body, may be intermittent / corroded?

OK, this is air-conditioning 1-0-1

You say that i holds a charge, and the compressore turns, but does the comprressor cycle on and off, as this is indicating that there is enough charge, and once there is low pressure detected, it turns the compressor on, and when it reaches a high pressure, the compressor cycles off.

Lastly, when engine running and AC on, if you feel the 2 pipes going in to the firewall, one should be hot, the other should be cold ???...is this happening ???

low milage tells me most likley the carb is gummed up. You may need to remove and clean out or try some fuel injection cleaner. Use twice as strong as recommended. Your description points to not enough fuel when cold which is when it needs the most. If your handy I would remove the bowl and blow out all chambers and tubes with brake cleaner.

Ok, time for car school. The vehicle is operated by the computer, every electrical concept that is. When the engine is cold, it starts fine because the computer has placed it in "cold start mode", putting more fuel into the engine than normally would until Once the engine is warmed up, a temperature sending unit or temp sensor tells the computer to change to normal run mode. IF said temp sensor is faulty and is not telling the computer to make said change, it stays in cold start mode, still dumping excess fuel in the engine that is now not required, cause it's warmed up. Like keeping the choke closed on older vehicles. Now I think you can answer your own question, when this no start action is happening after warm up and it always starts fine when cold, what's the first thing you check ? Right, the unsuspected temp sensor. Change that and no more start problem. Have a wonderful day. Glad I could be of service.

Hi BSM,

Intermittent heat is usually the result of a low coolant state. What happens is the heater core isn't getting the circulation necessary to keep the air warm. The irony is that your engine will run hotter when this happens.

To fix this, start with a cold engine and open the radiator fill cap.
Start the engine and top off the coolant.
Let the engine keep running and warm up.
When it begins to cycle the coolant check the level again. Top it off again.
Turn the heater on full blast
Keep topping after each cycle until it stops needing fluid.

At that time the heater should be blowing hot air consistently.

Best regards
Mike

Check the magnetic clutch is engaged on front of a/c pump, have the motor running, a/c on and fan on high, if the centre hub is static the pump in not switched on, this can happen when the gas pressure gets low.

try cleaning your flame sensor....

sounds like the idle control vale is sticking when it is cold. It is located on the throttlebody right at the air inlet

after checking the heater core hoses they were both hot I went in to look at the blend door and noticed it wasn't moving on hot or cold so I simply disconnected the lincage and moved to hot and its working ok. but its not completely repaired