I have a 1994 SSEI that has been running great up until recently. For some reason when I start to accelerate the car hesitates weather the car is warmed up or not. I noticed the other day that it was hesitating really badly when it was cold and almost stalled on me. Could this problem be a fuel pump? I would have thought that if a fuel pump went it stopped working all together. Other than the hesitation the car runs great. I have 346000KM on the car and it still has the factory pump in it. Another note is that it does it weather there is load on the engine or not. It will still hesitate if I give it some gas from an idle.
Are there any fuel pumps that flow a little better than stock ones if I have to replace it?