* Transmission Issues: This is a prime suspect. Problems with the transmission could manifest as skipping or rough shifting, particularly during low-speed maneuvers like stopping and starting. This could include:
* Low transmission fluid: Check your transmission fluid level and condition. Low or dirty fluid can cause significant issues.
* Worn clutch packs or bands: Internal wear within the automatic transmission can lead to slippage and skipping.
* Solenoid problems: These control the shifting process, and a faulty solenoid can cause erratic shifting behavior.
* Torque converter issues: A failing torque converter can cause slippage, especially at low speeds.
* Spark Plugs and Wires: Worn or fouled spark plugs can misfire, causing a skip or rough running, especially under load. Similarly, damaged spark plug wires can lead to misfires.
* Ignition System: Problems with the ignition coil, distributor (if equipped), or crankshaft position sensor can disrupt the ignition timing, leading to skipping.
* Fuel Delivery: A problem with the fuel injectors, fuel filter, or fuel pump could restrict fuel delivery, causing the engine to stumble or skip, especially under load.
* Engine Sensors: Various sensors monitor engine conditions (like MAF sensor, oxygen sensor, etc.). A faulty sensor can send inaccurate information to the engine computer, resulting in poor performance, including skipping.
* Vacuum Leaks: A leak in the vacuum system can disrupt engine operation and cause irregular running.
Troubleshooting Steps:
1. Check Fluids: Start with the easy stuff. Inspect your transmission fluid level and condition. Also check your engine oil level.
2. Listen Carefully: Does the skipping sound like it's coming from the transmission or the engine? This can help narrow down the possibilities.
3. Check Engine Light: Is the check engine light on? If so, get the diagnostic trouble codes (DTCs) read using an OBD-II scanner. This will provide valuable clues.
4. Professional Inspection: Given the complexity of potential causes, taking your vehicle to a qualified mechanic is strongly recommended. They have the tools and expertise to diagnose the problem accurately and perform the necessary repairs.
Don't attempt complex repairs yourself unless you have significant automotive experience. Incorrect repairs can worsen the problem and potentially cause further damage.
