Q: I have 2004 Mercury Sable. It randomly stalls, after putting in gas, on hot days, will start after resting AC goes hot during buck

asked by on

Our cars engine runs really well...when it decides to work. Especially (but not solely) on hot days, it will randomly stall. Usually when we are low on gas OR just put gas in. It shudders while driving if it's "acting up" & the AC will blow hot air. When it's running properly the AC is ice cold. After it stalls, 10-40 min later, it will start up again like nothing ever happened. Symptoms it's acting up: Bucking & lagging of engine while driving Shuddering while driving up hills & @ higher speeds (taxing the engine) AC blows hot & sometimes stop blowing out the vents (sounds like it's on defrost) When it stalls, & we try to start it before it's "ready" pressing the gas pedal causes it to immediately stall out. Before pressing the gas pedal the car idles very low & shudders. Hit the gas & RPMS drop to zero no known issues with starter or battery. check engine, ABS & brake lights on dash since day 3 Related?: Gas Tank says 3/4 of a tank/200mi to empty when it runs out of gas Thank you

Hi Sandy. Thanks for all the information - it’s very helpful to initially provide some technical advice. It appears as if you might have a few different things going on with your Mercury Sable. First, in regards to the engine vibrations and stalling, that’s likely due to air / fuel ratio components being damaged or dirty (such as the mass air flow sensor or EGR valve). It’s also possible that you have an electrical harness that monitors and controls these components that is loose or even a loose vacuum line (which might explain the inconsistent operation). In regards to the AC blowing cool without a problem and hot when there are issues, that may indicate an issue with the AC compressor or the pulley that drives it. When your AC runs, it draws a tremendous amount of power from the engine to operate this system. Existing problems with the engine will be enhanced considerably when the AC is on. When an AC compressor or the pulley’s are damaged, or wearing out, this type of symptom may occur. I think the best advice we can offer is to have a professional mobile mechanic come to your location to complete an onsite inspection, so they can determine what’s causing the check engine light, as that’s an indication that the ECU has detected a fault that needs attention - and will provide the mechanic with a starting point to diagnose your problems.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I have 2004 Mercury Sable. It randomly stalls, after putting in gas, on hot days, will start after resting AC goes hot during buck

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: where is the coolant temperature sensor located 2002 mercury sable

Hi there. The coolant temperature sensor on most Ford (Mercury is a Ford product) V-6 engines is located on the intake manifold, front of the motor and next to the primary coolant hose. If you don't have one currently, if...

Q: Failure to catch or switch gears, belts turning and car has power ect, but won't switch into any gears. Transmission/engine fluids are ok.

Hi there. I have seen this same concern while I was employed at a Toyota dealership. This sounds like the transmission has failed internally; most likely the internal brake band, solenoid, or valve body has failed. The transmission will ultimately...

Q: My car idles rough when at a stop and almost stalls why might this be?

Hello. Typically, if this vehicle runs fine at all other times and will have trouble idling when coming to a stop, it is almost always caused by a bad idle control valve. Most of the time the valve fails making...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.