My car starts and drives and it cuts off and starts again

30

Asked by Guru6CL1P Mar 20, 2020 at 08:53 AM about the 1998 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

I can drive my Mercury Grand Marquis i changed
the water pump the fuel pump fule switch the fliter
the radiator the thermostat two of the ignition
component fule pump sensor but when i drive it
drives then the its like it runs hot the temperature
gauge goes up and cuts off. For a few mins then i
can start it again it will drive an start again the cuts
off

9 Answers

30

It goes all the way up then when i take my foot off the gas it goes down now last night i drove it to walmart it done the same thing all the way the temperature gauge goes up and then it cuts off like this morning i drove it to the bank it drove for a lil while then the temperature gauge goes up then all of a sudden it cuts off i have a new radiator crankshaft fuel pump fuel filter coil packs fuel switch i also put in ignition components two of them just don't understand it will start up and then once it gets hot enough it starts acting up cutting off

30

No she will stay running if i have just crank up but once i drive it she cuts off now last night on the way back from walmart she drove all the way back she didn't cutt off at all i guess she was cool off enough

1 people found this helpful.
5,425

Crankshaft position sensor?, have a pressure check done on Rad. to see if there's a blown head gasket. Any suds inside the oil cap? Any on oil dipstick? Running low on water? As a last resort, bad water pump? Is the electric fan coming on? Could be shot, or a bad fuse for it. I have a suspicion that it's the problem.

30

Well i don't have blown head because the car would be smoking water pump is knew crankshaft is new fuel pump is new fuel flitter is new radiator thermostat coil packs spark plugs i can drive it but it just cuts off then starts back again

5,425

Fan coming on? Suds in oil cap? Tell me those things. A blown gasket doesn't necessarily blow smoke, sometimes just gets in oil. If the fan comes on, and it's still overheating, and you've replaced the thermostat and radiator, can't think of what else it could be, unless a kinked hose. Did you replace them? I always do with a new rad. and w/p

30

The fan comes on i don't have a oil leak now i did get a sensor changed out where my fuel pump is and when i drive it down the road my sensor for the trunk keeps coming on and then it still drives and then it start acting like it want to cut off. Then it goes back to the trunk again and then it drives and then it goes start acting like it wants to cut off again

1 people found this helpful.
30

I think its a electrical problem but i don't know where might be where my fuel pump is i didn't have this problem until i change my sensor out where the fuel pump is

1 people found this helpful.
5,425

now I know what it is. It's that inertial cut-off sensor in the trunk. It's supposed to shut off the fuel in wreck. I'll go out and look at mine tomorrow, maybe you could just cut the wires and tape them together, or just cut them, depending on how it's wired. You don't even need the damn thing. It should have 2 wires, if it has more, it's a bit more complicated, then you need to replace it. The fuel pump is in the tank, this sensor is in the trunk on the left. Has a reset button on it. you could always get one at a junk yard, but I'd try cutting and splicing the wires first, they most likely need to be twisted together to power the pump. I'll look late tonight to see if I have a wiring diagram.

1 people found this helpful.

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