* Fuel Delivery Issues:
* Clogged Fuel Filter: This is a common and relatively inexpensive fix. A clogged filter restricts fuel flow, especially under high demand (acceleration).
* Fuel Pump Weakness: A weak fuel pump can't deliver enough fuel at higher engine speeds. It might work fine at idle but struggle when you demand more power.
* Fuel Pressure Regulator: This regulator maintains correct fuel pressure. A faulty one can cause inconsistent pressure, leading to poor acceleration.
* Clogged Fuel Injectors: Clogged injectors restrict fuel flow to the cylinders. This is a more involved repair.
* Vacuum Leaks: Vacuum leaks in the fuel system (or related vacuum systems affecting fuel delivery) can disrupt the proper fuel/air mixture.
* Ignition System Issues:
* Ignition Coil: A failing ignition coil might not provide sufficient spark at higher RPMs.
* Worn Distributor Cap and Rotor: These components distribute the spark to the cylinders. Wear can cause misfires, especially under load.
* Spark Plugs and Wires: Worn spark plugs or damaged wires can cause misfires, leading to poor acceleration.
* Crankshaft Position Sensor (CKP) or other sensors: A faulty sensor can cause the engine computer to miscalculate the fuel/air mixture or ignition timing.
* Other Possibilities (less likely but worth considering):
* Throttle Position Sensor (TPS): A faulty TPS sends incorrect information to the engine computer, affecting fuel delivery and ignition timing.
* Mass Airflow Sensor (MAF): Similar to the TPS, a bad MAF sensor can cause incorrect fuel/air mixture calculations.
* Exhaust Restriction: A severely clogged catalytic converter or exhaust system can restrict airflow, hindering performance.
Troubleshooting Steps:
1. Check the easy stuff first: Start by inspecting the fuel filter, spark plugs, and wires. If they look worn or damaged, replace them. This is the cheapest and most likely to yield results.
2. Check for Vacuum Leaks: Carefully inspect all vacuum lines for cracks or disconnections. Use a vacuum gauge if possible to check system pressure.
3. Fuel Pressure Test: This requires a fuel pressure gauge and some mechanical skill. It's the best way to determine if your fuel pump and regulator are working correctly.
4. Diagnostic Scan: A scan tool can read trouble codes from your engine's computer, which might pinpoint the faulty sensor or component. Auto parts stores often offer free code reading services.
Important Note: Because multiple systems can cause this type of problem, it's crucial to address the possibilities systematically. Don't just start replacing parts randomly; troubleshooting is key to finding the root cause and saving money. If you're not comfortable performing these checks yourself, take your LeBaron to a qualified mechanic.
