You may have a broken or disconnected vaccuum line probably at or around the fuel injector or fuel line its most likely caused by a vacuum leak also if its injection check the cold start valve is working on the injection if its carb check the choke butterfly is closing and the choke idle speed is high enough could also have pulled a bit of dirt from the fuel tank but i wudda thought this would have affected the performance when hot too
check the cadallidic converter
Put in a new fuel pump, it will save the time wasted on everything else
Sputtering and hesitation in a Mazda MX6 could be caused by several issues, such as dirty fuel injectors, a clogged air filter, a faulty spark plug or ignition coil, or a problem with the fuel pump or fuel filter. It is best to have a mechanic diagnose the specific cause by performing a thorough inspection and running diagnostic tests.
First of all, if the check engine light is "ON" then that would be the place to start. If the fuel filter has not been replaced in the last 2 years then I would do that.
I had a similar problem. It was a coil pack. They are about 80 bucks. Fairly easy to fix. If you know how to change a Spark Plug, you should be able to change a coil pack.
The Synonym for sputtering is stuttering.
it could be running on only two or three cylanders
The engine began sputtering and then it went dead.
Usually a sputtering muffler means that a new catalytic converter is needed. The sputtering sound is the car misfiring.
There are a couple of reasons why a Nissan Pathfinder could be sputtering. The sputtering can be from bad gas or a bad fuel pump.
Why is this question not asked...................why is my 2004 ford escape spitting and sputtering .
I sometimes sputter when I'm nervous. Please reword the question and tell me what year and engine and describe what you are doing with the car when "sputtering" occurs. Would help if you can think of additional description of what you mean by "sputtering".