I have a 96 f150 4.9L 2wd 5sp and when it heats up it will stutter like it is running out of fuel and then go back to running normal. Sometimes it will even shut off but will start right back up and sometimes I can drive it with no issues. I have had this problem in the past and not even a dealership could tell me what to check for because the computer was not registering any faulty codes. I have replaced a coil, module, plugs, wires, cap&rotor and a distributer.It has been about 2 years since I did that and have had no issues until now. I recently replaced the vaccuum lines because the fuel vapor canister was filling with fuel. If anyone has any ideas please let me know and if you need more info I will elaborate as much info as I can. Thank you in advance.

 

Do you have dual tanks? If so, is one not working?

Does this only happen when the weather is warm, sunny, or humid?

 

whens the last time the fuel filter was changed?

 

Check the fuel pressure, the fuel pump is probably going bad. The vapor canister getting wet with fuel is a sure sign that one of the FDMs is failing and overfilling one of the tanks. The tank that is receiving the fuel when it shouldn't be is the one with the faulty FDM. The FDM is included with the fuel pump assembly.