1996 dodge caravan 3.8 engine stops after 2 or 3 miles will not restart untill cold losing ign fuel pressure 50 PSI

Has the valve timing been checked? This engine has three timing chains and a very specific procedure for setting the timing. I'm assuming the engine came with heads, cams, and timing chains installed, but builders can make mistakes.

This could have several problems. #1 Fuel pressure due freezing water in fuel lines add thermal aid or rubbing alcohol . If you have access to a pressure gauge there is a service fitting on fuel rail that you can test pressure while driving and see if the pressure is gone when car dies this could lead to fuel pump electrical or more restricted lines. #2 intermittent sensor failure Mopar uses 2 sensors to control spark and fuel lose one could lose spark lose the other lose injection with a scanner they call it C/C sync ok (cam/crank) if no then check for each parameters for display.# 3 relay controls ASD and FUEL pump for voltage drops.

You could have a fuel delivery problem. I would recommend to start by checking fuel pressure. Fuel injected cars are very fuel pressure sensitive. Fuel pressure is very important and must be within specifications! But if the pressure is low, it does not mean the pump is bad. A plugged fuel filter, a pinched line, and low voltage at the pump can contribute to low fuel pressure. All three must be check before replacing the pump! You can get a fuel pressure gage at a local auto parts store for cheap. Fuel pressure testing is frequently overlooked but it is one of the common causes of poor performance. The test procedure must include testing that will insure normal fuel pressure under all operating conditions. Key Factors 1. Fuel demands are low at idle. 2. Wide open throttle at high engine revs uses the most fuel. 3. Fuel pressure must be reduced when manifold vacuum is high. Vacuum pulls fuel out of the injector causing it to deliver too much fuel if the pressure remains high. Manifold vacuum is used to open the pressure regulator at a lower pressure when vacuum is high. A good way to check your fuel pump is to run an amp test on the fuel pump while it is running or while battery voltage is being applied ot it (turning the key on, cranking your vehicle or even when your engine is running. The amount of amps your fuel pump will pull will depend on how much fuel pressure your fuel pump should supply to your fuel rail. A good rule of rule of thumb for this test is as follows: 14 to 15 psi 3 to 4 amps 30 to 45 psi 4 to 7 amps 45 to 50 psi 7 to 8 amps 50 to 70 psi 8 to 12 amps

auto choke problem ,try changing the temperature sensor

WELL DO YOU HAVE SPARK IF SO WHAT IS FULE PSI I THINK ITS SHOULD 45 TO 50 PSI

Has Neon do same, I ran fuel at low level, on hot day, ran engine until it started to act up & threw a fuel pressure gauge on it. Was at approx 5 psi. Cold next morning, 48-50 psi. Always hot day about 30-40 miles into work in morning, o.k. Sit in hot sun all day & would happen 3-4 times on way home. Sit and let cool, 20 minutes or so & go again for a while. Cool day, no problem. Change pump I would.

Don't have access to actual pressure required at this moment but I will tell you that 12-20 psi is definitely not enough. Your probably looking at a minimum of 50-60, and as much as 90-100 depending on what engine. A replacement for a 3.3.L at autozone is rated at 90-100 psi. I'd spend the money on new pump & filter at same time.

Once a filter plugs its pluged. You drop that much pressure its time for a new fuel pump.

You need to do a fuel pressure check.. You will need a special fuel gauge and the appropriate fittings and adapters are needed to properly test the fuel pressure.

1. Relieve the fuel pressure.
Remove the fuel pump relay form the Power Distribution Center (PDC) Start the engine and run until it stalls. attempt restating the engine until it will no longer run. Turn the ignition key off. Disconnect the cable from the negative battery terminal. Replace the fuel pump relay in the PDC. Any if you get any trouble codes at this time you will need to see a shop to have them cleared.

2. Disconnect the quick-connect fuel line fitting fuel gauge into the fuel line using the appropriate T-fitting and adapters.

3. Start the engine and check the pressure on the gauge, your reading should be 49 PSI with the pressure with the engine idling.

4. if the fuel pressure is not 49 PSI:
1) if fuel pressure is higher you could have a pinched of clogged fuel return hose of pipe. if the line is not obstructed check the fuel pressure regulator.
2) if fuel pressure is lower check the fuel filter, look for a pinched of clogged fuel hose between the tank and the fuel rail. check the pressure regulator for malfunctions. Look for leaks in the fuel line.

Hope this helps.