* Initial Start: When you turn the key, the initial fuel in the lines (from previous operation) is enough to get the engine running briefly. This fuel is already in the fuel rail and injectors.
* Stalling after a few seconds: Once that initial fuel is consumed, the engine needs the fuel pump to supply more. If the pump isn't working properly, or there's a blockage further down the line, the engine starves of fuel and stalls.
Several things could cause this:
* Fuel Pump Failure: The most likely culprit. The pump itself might be failing due to age, wear, or lack of lubrication. It might not be providing sufficient pressure, or it might be intermittently failing.
* Fuel Pump Relay: The relay that switches the fuel pump on and off could be faulty. It might not be sending power to the pump.
* Clogged Fuel Filter: A clogged fuel filter restricts fuel flow to the pump and injectors. This is less likely to cause a stall immediately after starting if there's some residual fuel, but if the filter is very badly clogged it could be the cause.
* Fuel Lines: Blockages or leaks in the fuel lines between the tank and the engine would prevent the fuel from reaching the pump or injectors.
* Injector Pump Issues (if applicable): While you mention an injector pump, the 1988 Dodge Aries likely uses a *mechanical* fuel pump, not an electric injector pump (that's more common in diesels). If your car has a separate electric fuel pump *in addition to* a mechanical pump, there might be a problem with either. It's important to clarify if you're referring to a mechanical or electric pump.
* Fuel Pressure Regulator: This regulates the fuel pressure in the system. A faulty regulator might not maintain the correct pressure, leading to stalling.
Troubleshooting Steps:
1. Check the Fuel Pump Relay: Locate the relay (check your owner's manual or online resources) and try swapping it with a known good relay of the same type (if available). This is an easy test.
2. Listen for the Fuel Pump: When you turn the key to the "on" position (but not starting), you should hear the fuel pump briefly prime. If you don't hear it, the pump or relay is likely the problem.
3. Check the Fuel Filter: Inspect the fuel filter for any signs of damage or clogging. It's a relatively inexpensive part to replace.
4. Check Fuel Pressure: This requires a fuel pressure gauge and some mechanical aptitude. The gauge connects to the fuel rail to measure the pressure when the engine is running (or attempting to run). Low pressure indicates a fuel delivery problem.
5. Inspect Fuel Lines: Look for any visible cracks, leaks, or kinks in the fuel lines.
If you're not comfortable performing these checks yourself, take your car to a qualified mechanic. They will have the tools and expertise to diagnose the problem accurately. Don't attempt to work on the fuel system yourself unless you have experience working with gasoline and understand the risks involved – fuel is flammable and dangerous.
