I have a 1997 Dodge Intrepid the motor is a 3.5 liter with approximatively 270.000km the car ran beautifully until i went to put gas into it and 20 minutes later the car just died. I went to turn it back on all it does is start for a second then spit and spudder then dies. We took it to our local mechanic nothing wrong with the fuel filter Or anything we can see. he said he thinks its something to do with the wiring. We checked and even got a new computer for it and still a no go. If anyone has any ideas whats wrong with it Your be my best friend haha!!.. Thanks Richard

The only way anyone is going to be able to help you is if you can tell them what is missing...
Your engine requires Fuel, Ignition, Compression, and Timing to run. One or more of these is missing. Since your vehicle is an OBD II compatible vehicle, the logical starting point would be to scan your engine computer and see if there are any fault codes stored. If there are, then you must diagnose the fault codes first. If there are no fault codes, then you must do manual testing of your fuel system, ignition system, and to check compression and timing.
As you now know, having wasted time and money on a computer, it does absolutely no good to start replacing parts until proper diagnosis has PROVEN the parts to be defective.

Please also review this article: What Else Could Be Wrong?

How much fuel pressure do you have you need at least 35 lbs to start and stay running it really should be 45lbs for proper running.