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I have a 97 Grand Caravan that will go dead after I crank it and it runs for about 5 minutes. I turn key on 2 or 3 times and will run fine for about 5 or 10 miles and will stall out going down the road, I can press and hold accelorator and van will eventually accelorate back to normal. Sometime when I do this I can accellorate up past 3 or 4,000 RPM and seems like it has a rev. limiter. Pull over and turn van off turn key a few times let fuel pump kick in twice and it will fire up and run for a few more miles. Sometimes it will run fine for 30 to 40 miles. Note it has been doing this for about 1 year. I have been told fuel pump, and fuel injectors. It would be very expensive to replace all and still have the problem.
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It should be easy to determine if the fuel pump is the problem. A repair shop should "tee into " the fuel line and tape a fuel pressure gauge to the windscreen of the van, then drive the car until the problem is experienced. If the fuel pressure gauge reading drops below the specification the pump is bad. Any shop should be able to verify fuel pressure and fuel delivery volume. A scan tool should also be attached to the diagnostic socket under the dash to see what the Long term fuel trim value is to see if the vehicle's fuel/ignition computer is adding fuel. A scan tool that reads live data can be attacked to your van when it is driven to look at fuel injector "on" time, look at in live time how much air is entering the engine ( or at least what the computer in your car thinks is entering the engine) other key sensors can be looked at to see if the failure is related to sensor performance, or fuel delivery.