99 dodge caravan 3.3 with key on fuel pump comes on then goes off multiple times lsorelays are chattering underwood. what I've tried is new fuel pump and idle sense same problems. car cuts and

Meaning when you try to start the engine doesn't crank over? If this is happening, then it is the ignition switch that is bad. But if it cranks over and doesn't start. When you cycle the key, you turn the fuel pump on every time and it pressures up the system. The check ball in the fuel sending unit or fuel pump is stuck open, letting the fuel drain back to the tank. I would live with it until the pump fails. Because to fix it you have to replace the sending unit and pump. Shop cost is around $600.

May be the problem is not the fuel pump but the regulator valve in the fuel manifold. Has a manifold pressure and pump pressure test been done . One has to be careful with caravans as by nature they sit for long times without use and it is a tendancy to leave the fuel tank with a limited amount of fuel in it with related problems.

If you mean that you turn the key to start but the starter motor doesn't engage the flywheel until the key is turned to start several times, try this. Look under the front of the car and locate the starter motor, which will be at the front of the oil pan. Tap the end of the starter motor with the handle of a large screwdriver a couple of times. If the starter then engages, the starter motor is bad. What happened to the last 99 Caravan (w/175,000 miles) was that a large amount of oily gunk had made its way into the part of the starter that housed the motor brush ***'y, preventing the motor brushes from moving freely and keeping one or more of them from making contact with the armature. The fix was to spray cleaner into the unit. That freed up the brushes and allowed the starter to work. That was a year ago. If you mean that the motor turns over, but doesn't start until you have tried 3 or for times, then I suspect a fuel problem. I have seen a problem where the fuel drains out of the fuel line when the car is off so that repeatedly turning the key to start runs the fuel pump which must refill the fuel line before it can reach the engine. Check the fuel pump, the fuel pump relay, etc. Or, locate the fuel pump relay, under the hood, on the driver side fender. Carefully remove the relay and remove the black plastic cover by lifting the two tabs. Carefully reinsert the relay, sans cover, and have an assistant turn on the key. If the contact "pulls in" then have your assistant remove the gas cap and listen as you manually close the contact with your finger. ( It's okay, the 12 volts won't shock you!) If they can hear a whirring sound, then the pump is working. Have someone start the car while you keep the relay engaged. Hope this helps. Dano

More than likely the electric fuel pump in the fuel tank is sticking and you have no fuel pressure, to check this turn the key to run and with the assistance of a friend listen for a humming at the gas tank filler pipe with the cap off, you will only hear this hum for 1 second so cycle the key off and then on repeated times to verify the results.

sorry but there is not a fuel pump reset on a dodge caravan.

try turning key on and off 2or 3 times then see if it starts right up. if it is there is a check valve in the fuel pump. it cant be replaced. you would have to replace the whole sending unit. costs about $600.00

Have a fuel pressure test done, that will show if the fuel pump is weak or the pressure regulator is faulty. When was the fuel filter changed last?

it is located on pass side behind timing cover the timing belt runs the water pump so the timing belt will have to come off this is a big job!

You should definitely replace the fuel filter though this probably won't fix your hesitation. It wouldn't hurt to replace the spark plugs this is usually the culprit on these engine. I have the same engine in a '99 caravan and found the for some reason the spark plugs on cylinder 3 and 4 loosen up after one year and cause a misfire between 45 and 50 mph under load (when mildly accelerating).

you had to drop the tank a few inches