I was driving and my van just died i had it towed home and had a mobil mechanic come look at it he took off plug wires and beat on the gas tank and it started right up he told us to replace the plugs and wires or the fuel pump we replaced the plugs and wires it started twice and now it just tries to turn over but it is not firing i can hear the fuel pump hum when my key is in the on position?

Sometimes you can get to "revive" temporarily a bad pump beating you gas tank, might be enought to drive it to mechanical service to replace it and saves you a towing service.

Amazing.....At this very moment in time.....my 2000 silhouette is doing the same thing....if you were unaware.....ventures Montana's and silhouette are from the same mold. Very similar in all aspects. My diagnostics have got to the fuel pump part of suspects....but I have already checked filter, relays, fuses and ignition electronics....my latest suspect is the pressure sensor that monitors the pressure of the gas tank....there is also a pressure sensor on the injector rail I'm suspicious of. I'm going to find out how to place each sensor in "okay ....fuel pump turn on and pump fuel to the throttle body" to check them. In my case....I don't smell any gas after turning the engine over....trying to start it.....sometimes for over an hour....never any gas smell....so I suspect fuel delivery is the problem. The fuel pump has several sensors that control whether or not it needs to run....and pump gas. I can hear my fuel pump run for 2 or3 seconds when I turn the ignition to the on or start positions.testing all of those sensors is my plan of action for this 3 day weekend. Your on track with your work and suspicion of the position sensors......vacuum leaks will follow the sensor checks. Vacuum leaks could cause a couple of sensors to fail too.....I dropped my fuel tank last weekend....and found the fuel pump to be in working condition.....I removed my fuel filter and punched a hole through it for free flow.....to eliminate it from the list...after checking the vacuum angle....I will move to the electronics side.....with the ignition switch first and the transmission position indicator switch following.....I've plugged my trouble code reader in and didn't get any indication of any failed electronic devices......my problem and your problem seem to be very similar, except that I am doing all of my work on the van myself. I will try to keep you informed of my diagnostics through fix it.it would be nice to know how yours is advancing too.....there are a few directions you can progress into.....hope one solves your problem....if not.....there will be more ideas to come....until I solve my problem....good luck to. Us both and onward we go......Nick.ps couldn't spell or grammar check because I'm using my phone to compose....and the typing pad covers the entirescript being typed. Sorry for any problems. Associated

yes these dash switches have allways been a problem the best way is to replace it with correct one from autoparts store but i usually replace tank selector valve at same time (there both about due) shield your eyes when dealing with this device as gas sprays out when removing it
a note : observe fuel level while driving on both switch posisitions the faulty one will indicate No fuel level when you know you got gas in both tanks

Try another fuel filter.If you have a carburetor,change the filter in it,if fuel injected,clean injectors.

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had that same problem with a honda civic and it was the fuel pump in the tank. the car would shut the power supply down to the fuel pump for some reason so i just jumped it with a toggle switch. what u do is set up the jump from ur dash to ur fuel pump and keep it off. now drive it around till it dies again and flip the toggle on and i bet u it will start right up

you have to find out if it is spark or fuel,usually its the fuel pump located in the gas tank,try tapping the tank while cranking the key if it starts its the fuel pump.or you lost spark check the map sensor it seems to control spark.

check the fuse for the injectors,the wires may have shoted out at the breather and blown the fuse to open the injectors--separate fuse than the fuel pump

A bad earth connection point on my New Zealand model Chrysler Voyager LE (same car as yours but right hand drive) caused similar problems, including the towing thing. My dealer told me that they would be busy for 3 weeks - dealer talk for "we would prefer to sell you a new one".

A bunch of black wires connect to a chassis ground bolt on my model on the right hand side wall, under dashboard height. I was "lucky" to have the fault present when investigating it, and testing I did afterwards proved this to be a definite cause. You have to remove some covers and pull the floor carpet away This may be on the left on your model. A plug in connector is used, to bring multiple wires together at this point. All I had to do was undo the nut and clean the metal of the bolt and earth lug - use a file or sandpaper, and maybe spray on some WD40 or CRC to impove conductivity. I added an extra washer to help the metal to metal bond also.This seems to have fixed the problem. It has been OK now for about 1000 miles. Good luck !