I have a 93 Isuzu Trooper with a 3.2 v6 and this is the second encounter with this problem.

The first time I started the engine and then killed it backing out of the parking spot. Then it wouldn't start. It would turn over and stumble for a second then die. I thought I was out of gas so I added 5 gallons and then it started up and worked fine for a little over a month.

Today it did the same thing, only I was driving through a parking lot, came to a stop sign and it started stumbling. I kept it running but it died just after I turned onto the street. Now it does the same thing as last time, turns over and sometimes stumbles but wont start. The gas tank is full, the last time this happened it was past E.

I'm thinking that it might be the fuel pump. The fuel filter was replaced two and a half years ago (about 30,000 miles ago). The vehicle has 183,000 miles.

Any ideas?

You can do a quick check of the fuel pump, by turning the truck on(obviously, w/o the start), adn finding the pressure fitting ont he fuel rail. You can either get a gauge to fit the fitting(at least a 60 psi gauge), OR (at your own risk), push in the stem, adn see if fuel sprays out.. make a note how it comes out, if it is a nice strong spray, try the fuel filter first, and if that doesnt salve it, get an actuall pressure reading, adn then start looking into your injectors(though, I think its a pump my self).. if the flow seems weak, or not at all.... well, your fix is gonna be VERY obvious....

HTH
Chase