How do I fix a no start problem with my mini van ?

Crank sensor. Depending on your engine, most are behind the harmonic balancer. Passenger side, lowest pulley on the engine.

Two items to check. The crankshaft sensor will reduce fuel pump pressure if it miscounts the RPM. The plastic strainer in the fuel tank can break apart and clog the pump intake in the tank. When the engine quits, the fuel pump is stopped and the loose particles are returned to the tank bottom.

In either case, try checking the fuel pressure at the test tap on the fuelrail.

Determine if it is an ignition or gas failure. Does the fuel pump still work? Do you have gas up to the engine? Watch the injectors for spraying a cone pattern of fuel when car is cranking-that is, if the car is throttle body injected. If multi-port injected, you cant see the injector spray, so check for fuel at the engine fuel rail, or crack the fuel line at the engine to see if fuel is under pressure. The correct way is to check fuel pressure with a gauge, barring that, see if fuel is getting to the engine. If not, pump may have quit.
To check ignition, pull off a plug wire and check for spark when cranking. Be careful of shocks, hold wire with a glove or heavy rag, push the rubber boot back to expose the metal end of plug wire, and hold the wire 1/4 inch from a metal piece on the engine. Have a helper crank the car over and observe spark jumping from wire to ground-a good spark is a blue, snapping spark. Good ignition. A weak, inconsistent, or orange spark is a sign of ignition problem, possibly a bad coil, bad ignition module (the TFI module), or other ignition component.
If you have good spark (good ignition), and still unsure of fuel, spray some starting fluid or carburetor cleaner into the air intake and crank the car over. If it runs for a few seconds and dies, you know gas is the problem. The pump has quit or the fuel filter is clogged. You may even want to try this first, cause if it tries to run, you know ignition is good, and gas is not getting to the engine. Good luck.

I would check and be sure I had fire to the plugs and fuel to the throttle body. I read what you wrote about the fuel pump but then on the end of the description where you put gas in the van the pump might not be working. If so you could have a bad wire to the fuel pump or a plugged fuel filter. Once you verify those items I would pull the 02 sensor ahead of the catalytic converter in the exhaust and make sure the cat or muffler is not plugged. If they are it will put back pressure on the engine and not allow fuel into the cyl. to fire.

you need to check fuel pressure at fuel rail,
check with tester at reed valve,you will need at least 55psi of fuel pressure to start the van.

Check the fuses/relays for the fuel pump and make sure you are getting gas to the fuel injectors. Also check your fuel filter....if it is clogged it could be stopping the gas from getting to the injectors....good luck

when you say car lost power bought a new battery.sound like alternator not charging battery.with car running your voltage at battery should be 13.5 volts or 14.5 volts it not alternators need replacing.have garage replace alternator if faulty because 1993 to 1994 cars if you disconnect battery car would lose memory causing car not to idle.the car will stall out at a stop light or stop sign whole lot.it would relearn itself but the stalling out dangerous around a lot of traffic.

Check fuel pressure to make sure your fuel pump is working .If ok let us know and we will help futher.

It sounds like the alternator has gone bad and needs to be replaced. The alternator has stopped charging the battery which cause the lights to dime and when the voltage dropped below 10.5 volts the ECM stopped sending signals to the fuel injectors to inject fuel in the the engine. If you have a volt meter and can jump start the van, check to see what the volts are at the battery post. You should have 13.5 to 14.5 volts with the engine running and with the engine not running there should be 12 volts for a fully charged battery. Auto Zone sells the alternator for your van and can give you the step by step instructions to getting the job done with common tools and should take you about 2 hours if your good with tools. Good luck and keep me posted, be glad to answer any more questions you may have.

What happens when it sits for a while, does it start back up & go ?