My Jeep Grand Cherokee wont stay running dies after about 4 sec.Replaced fuel pump already and can hear it coming on. The overhead display wont read temp and gauges on dash dont work during the 4 sec. It is a 2000 with 4.0 6 cyl.
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it will not start or will idle rough or just die ....need to check to see if have pressure in the fuel rail...also turn key on and see if you hear the pump run in the fuel tank
If you can hear the pump running inside the tank right after it stalls and you turn the key to the run position, I'd be looking at the crank position sensor. If that fails, fuel will reach the fuel rail but the injectors won't fire. Also check cam sensor, pump relay and ASD relay in power distribution center.
Check your engine to see if ,it has a yellow or blue spark and if it does then check your fuel filters and fuel pump to see if they are working or not.
check the fuel pump fuse/relay, could be just bad enough to cause an intermittent start/no start. and check fuel pressure,spark and the crank position sensor.
My 2000 Grand Cherokee had the same problem, without all the sputtering, it would just die approaching a stop. We could only keep it running by slightly pushing down on the gas petal when coming to a stop. I replaced the Throttle Position Sensor, but that didn't change anything. A new mechanic I found replaced the Idle Air Control Valve, and we've had no problems in a week.
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