Turns over & fires for a second then stops , turn key off, when try start again fires a second or two but will not run. had this problem over a year ago, replaced fuel filter & worked ok for about a year. problem reappeared, again changed fuel filter but problem continues.
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When you turn the key to the on position, listen to see if you can hear the fuel pump running in the gas tank. You should hear a humming noise coming from under the van. If you do not hear the humming, check the fuses. If okay, use a can of starting fluid and someone to start the van(a two person process), spray the starting fluid into the air intake; keep spraying while the other person is starting the van. Do this for approximately 60 seconds. If the van starts up you have a fuel delivery problem; especially if you hear the humming noise coming from the fuel tank. The humming at least lets you know that you have power going to the fuel pump. The fuel pumps go out on these vans every now and then. If you live in a hot climate don't let your tank get below 1/4 of a tank; if you do this, it will lengthen the life of the fuel pump. More fuel in the tank allows the pump to run cooler. Check the fuel filter. When was the last time that it was changed? If the pump is indeed bad you will be changing the fuel filter, the pickup sock, and the fuel pump. Make sure you have not run out of gas.
DO'ES THE VAN TURN OVER ? DO'ES THE VAN HAVE THE FUEL PUMP RUN LONG ENOUGH TO BUILD FUEL PRESSURE?IF YOUR FUEL PUMP AND STARTER ARE WORKING THEN CHECK FOR FIRE TO THE PLUGS. YOU MAY NEED TO GET THE CODES READ TO FIND THE PROBLEM IF YOU HAVE FUEL AND FIRE.ONCE YOU GET THE STORED CODES,REPLACE THE SENDER THAT CAUSED THE CODE OR REPAIR THE WIREING TO IT.
I had problems with my remote button, with battery fully charged turn on key for ten second, turn key off un-hook positve side of battery, re conect turn key to on postion then try to start, it worked for me I have a 2003 denali yukon XL, the motor would fire then stop.
Do you hear pump cycle (hum) when you turn key to on position? Take air intake hose of front of throttle body & spray WD-40 inside throttle body with plate open for a couple of seconds, then see if it will start & run for a second or 2. If it fires up for a short time, it is fuel related problem. Perhaps autoparts store lends or rents fuel pressure gauges, which will confirm if pump is working or not.
Take off your gas cap and have someone stand there with thier ear at the hole, (no smoking), turn the key to on just before start and they should hear the fuel pump humming. if they dont then try to start. if it doesnt start turn key off and at that instant the pump should be heard again. What i think is happening is your pump is not energizing . Its supposed to energize when turning your key on and off. This can be caused by a bad fuel pump or pump relay switch. Hope this helps. please rate me
My 1997 safari was doing the same. After being shut off for a short period of time it started as if it was flooded. If I put the accelerator to the floor it would fire up. As well, I had no engine codes to report. I replaced the fuel pressure regulator and everything is great. It was leaking fuel into the engine causing it to act flooded when starting. Once started, the computer system made adjustments for the leaking fuel so the engine ran fine. If you turn the van off and immediately try to start it, it should fire up. (don't give it time to leak extra fuel into the engine)