Video Summary
Sure, here’s the summary:- The engine needs the correct amount of air, fuel, spark, and timing in order to start.
- There are two types of timing, mechanical and electrical, where the timing chain must be synchronized with the camshafts and crankshaft.
- The engine control module controls the ignition process.
- To find the reason for a “crank, no start” condition, check the fuel system pressure.
- If the fuel pressure is off-spec, the pump or fuel filter may be weak or clogged.
- Air system issues include a clogged idle air control valve, dirty throttle plate, or a large vacuum leak.
- With a small vacuum leak, the car may still start, but it will likely result in a rough idle.
- The air/fuel mixture is often disrupted by a dirty throttle plate.
- Next, check the ignition system, by performing a spark test.
- A faulty crankshaft position sensor can cause the ECM to prevent spark.
- The type of ignition system in the car also matters in identifying the issues.
- A malfunctioning anti-theft system can cause the engine not to start.
- Extreme loss of compression can be caused by a warped cylinder head, blown head gasket, or broken timing chain.
- Computer system issues like the ECM and BCM can malfunction, preventing the car from starting.
