My 1993 f-150 will die at stops and low rpm. But it wont die till I press on the gas a little... The heater is blowing cold to. Last year I had the same problem, but I had the higher than basic oil change done. Flush, etc... and this fixed the problem last year. I just had the basic oil change done this year and the problem isnt fixed... What should I do?
As far as heat goes I would replace your Thermostat and that should stop it from blowing cold due to the fact its probably stuck open unless your heater switcher arnt switching from vent to heat when you turn them. Does your temp gauge show your truck is running cooler then it use too? As far as it dying when you come to a stop that might be a few things I would check idle screw first then plugs clean or replace then Go to throttle position sensor (TPS) or AIR TEMPERATURE SENSORS (IAT) sensor. They somtimes wont turn your service engine light on but still will cause problems if they need cleaned.
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www.fullsizechevy.com > ... > Technical / Maintenance Jun 19, 2005 - 17 posts - 9 authors
The truck will start but then die right out. I can do this all day long with the same effect. I can however keep it running by feathering the throttle. if ...
run engine press on gas pedal slightly to add more rpm turn on ac if engine stops or squels there is problem with ac comp, if engine still run check plugs if fouled clean or replace, engine rpm should be at least 600-700 rpm at idle speed
If you have looked up the code and it tells you the vehicle is running lean and you have changed the O2 sensors, you may have a clogged fuel filter or worst yet a fuel pump that is going bad and not providing enough pressure. Take it to a repair shop and ask them to test the pressure. It is an inexpensive test that will only take a couple of minutes. If the pressure is low try replacing the filter first as it is much cheaper than replacing the fuel pump that is in the gas tank.
a question to an answer: is your truck has any heat when you rev it 2000 rpm, or above?
have you check your coolant level? if level is low you have a small coolant leak, a water pump may be at fault, and causing air pockets in your heater core, check for leaks your self, dealer wont tell you if vehicle still under warranty.
What is everything? does just the engine stops running, or does the heater fan and headlight stop too, does the the radio and parking lights stop working? does the starter engage after it stops? If you answer this question I will be able to help you.
Have you checked your coolant? if coolant is low it can cause an air pocket in heater core and it wont pass out until rpm's increase by the extra flow of water pump. if it is full then might wanna try removing heater hoses and back flushing heater core with water might have a little trash in it restricting flow.