FUEL RELATED ISSUE THAT CAUSE ENGINE WON’T START
The fuel pump will be disabled by system when your light is flashing to prevent your engine get starting. The issue might be a chip in a key, or entry fob or a battery in a key, or a fault in the system itself.
Bad fuel pump
Pump should operate for a couple of seconds when ignition key is turned to start, no buzz means no fuel delivery to the engine.
Awful inertia fuel shut-off security switch
Shuts off fuel in an crash, may have been triggered by a serious jolt, press button to reset.
Anywhere, open in wiring at fuel pump wiring circuit (anywhere ground or power). There may be a problem with the cable connectors (hard to reach) on top of the fuel tank.
No gasoline in fuel tank
Check the fuel gauge, and keep in mind the gauge might not be reading correctly.
Contaminated with water or too much gas or diesel fuel). Your car won’t start and if you filled up with gasoline, suspect gas that is bad.
Plugged Fuel Filter
When was the filter last altered? . If plugged with rust,k fuel tank may have to be replaced or cleaned.
Pinched or Plugged Fuel Line
For damage diagnose, check fuel lines underneath vehicle.
Fuel Pressure Regulator Leak
Manages fuel pressure to injectors, that is vital for starting and suitable air/fuel mixture.
Fuel Injectors Is Not Powered (No Power)
Because of blown fuse, malfunctioning fuel injector relay, there zero input signal for position sensor (camera) or to PCM from crank, or poor PCM driver circuit. Injectors should have power when key is on. PCM grounds side of injector circuit to pulse the injectors.
Major Vacuum leak
This will produce the air/fuel mixture and make the engine hard to start. Engine will idle rough if it will begin.
IGNITION RELATED ISSUES THAT CAUSE ENGINE WON’T START
Awful crankshaft position sensor or distributor pickup
Sends heartbeat signal to ignition module or PCM that’s essential to activate the ignition coil(s).
Ignition module is bad
Poor ignition module (controls shooting of ignition coil(s), may have an irregular open in circuitry that causes loss of discharge, hard starting or sudden stalling, usually if hot)
Bad ignition coils
Poor ignition coil(s). Voltage produced by ignition coil. A bad coil will stop spark at the plugs on engines having a distributor. On engines with a distributor-less ignition system or coil-on-plug ignition, a coil is only going to affect a couple of cylinders depending on the program. This may make the engine hard to start, but it is going to run.
Cracks or carbon paths inside distributor cap or on rotor
On older engines with vendors, carbon or cracks paths allow spark to short to ground prior to it gets to the spark plugs. Same thing could happen in coil-on-plug ignition systems if carbon or cracks paths inside coil tube.
Bad spark plug wires
If wet, chipped, burnt or inner resistance exceeds specifications, can hinder good spark and make engine difficult to start.
Fouled spark plugs
If the electrodes are infected with residue, spark may short to ground before leaping gap leading to misfires. Could make engine difficult to start and run. When you removing the plugs and it’s wet, it means that engine is overloaded r they aren’t firing.
GENERAL CAUSES OF NO COMPRESSION
Chain or timing belt is broken
The engine won’t run if the belt has broken, and it might have bent valves or other harm as a result of the belt breaking).
This can occur on an overhead cam engine when the engine has overheated, warped the mind and captured the camshaft.
Plugged catalytic converter
Creates a limitation which leads to exhaust back-pressure to back up. Engine may begin but usually dies within a minute or two.