Car stutters, sometimes stalls

[JDM onlyy]

My girlfriend has a 1995 Nissan maxima, and it starts up fine. The problem is after I drive for awhile it'll sometimes stutter and shake and sometimes stall out. It will also do it at a red light after driving the car for awhile. I've changed spark plugs, fuel filter, air filter, changed oil, seafoamed the intake manifold and gas tank. What could it be? The help will be greatly appreciated. Thanks in advance IA!

[John@TA]

If you did the Seafoam after you put the new plugs in, you could have fouled them out.

Is there a check engine light on? If so you can swing by a shop that has one of the older scanners and get a diag ran on it. a stutter and stall could be almost anything.

First thing I would look at however is fuel pressure. Your fuel pump could be bad....not sending enough fuel to the injectors. Does it tend to die out when you push the gas harder or try to accelerate quick?

[JDM onlyy]

If you did the Seafoam after you put the new plugs in, you could have fouled them out.

Is there a check engine light on? If so you can swing by a shop that has one of the older scanners and get a diag ran on it. a stutter and stall could be almost anything.

First thing I would look at however is fuel pressure. Your fuel pump could be bad....not sending enough fuel to the injectors. Does it tend to die out when you push the gas harder or try to accelerate quick?

It started stuttering and stalling before I did the Seafoam. I'm hoping that my fuel pump isn't bad. And no check engine light. It doesn't die when I push the gas harder or try to accelerate quick.

[Marta Mike]

Do a fuel pressure test. If its happening after you drive for a while, the pump may be getting hot and malfunctioning.