* Fuel Pump Relay: This is often the *first* thing to check before assuming the fuel pump itself is bad. A faulty relay will prevent power from reaching the pump. Testing the relay is relatively simple and inexpensive.
* Fuel Pump Wiring: Worn or corroded wiring harnesses, particularly in the area near the tank, can cause intermittent or complete power loss to the pump. Inspecting the wiring for damage and ensuring good connections is crucial.
* Fuel Pump Itself: The pump can fail due to age, wear, and tear. Continuous operation and exposure to fuel can cause the pump to wear out, leading to weak pressure or complete failure. This is more common on higher mileage cars.
* Fuel Filter: A clogged fuel filter restricts fuel flow, putting extra strain on the fuel pump and potentially causing it to fail prematurely. Regular fuel filter replacement is preventative maintenance.
* In-Tank Fuel Pump Module: The 1991 Stealth likely has an in-tank fuel pump module, meaning the pump is housed within the fuel tank itself along with other components. Failure of the entire module is more expensive to repair than just replacing the pump. Often, the entire module needs replacement rather than just the pump itself.
* Low Fuel Level: Running the tank very low on fuel can cause the pump to overheat and fail prematurely, as it’s not properly cooled by the fuel surrounding it.
Symptoms of a failing fuel pump in a 1991 Dodge Stealth might include:
* Engine stalling: Particularly under acceleration or when the fuel tank is low.
* Difficulty starting: The engine might crank but not start due to lack of fuel.
* Weak acceleration: The engine may lack power or hesitate.
* Surging or rough idle: This can be caused by inconsistent fuel delivery.
* Fuel pump whine: You might hear a humming or whining sound from the rear of the car, especially when the ignition is turned on. However, the absence of this sound doesn't automatically mean the pump is good; it can fail silently too.
Troubleshooting steps:
1. Check the fuel pump relay: This is the easiest and cheapest first step.
2. Inspect the fuel pump wiring: Look for any damage, corrosion, or loose connections.
3. Check the fuel filter: Replace if necessary.
4. Check fuel pressure: If you have a fuel pressure gauge, this will definitively tell you if the pump is delivering sufficient pressure.
5. Consider the entire in-tank module: If the pump itself is faulty, you may need to replace the entire module. This is often more cost-effective and less time-consuming than trying to repair just the pump inside the tank.
Before undertaking any repairs yourself, ensure you are comfortable working with automotive systems, and always consult a repair manual specific to your 1991 Dodge Stealth. Improper handling of fuel can be dangerous. If you are unsure, take it to a qualified mechanic.
