Engine cranks but wont start?

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MEMBER
1994 MAZDA 323
4 CYL
2WD
AUTOMATIC
150,000 MILES

1994 Mazda 323 mileage: 150,000. The car will crank over but it won't start. The ignition system is working, all fuses appear to be intact, and the fuel system appears to work, as it will pump fuel to the EFI unit. When the car quit, it was doing fine, then lost power drastically. After pulling off, the car would not restart. Any suggestions on what to check to isolate the problem?

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Based on the information provided, there are several possible causes for the issue you're experiencing with your 1994 Mazda 323. Here are some suggestions to help you isolate and identify the problem:

Check the spark plugs and ignition system: Even though you mentioned that the ignition system is working, it's worth inspecting the spark plugs to ensure they are in good condition and properly gapped. Faulty or worn-out spark plugs can prevent the engine from starting. Additionally, check the ignition coil, distributor cap, and rotor for any signs of damage or wear.

Verify fuel delivery: While fuel appears to be reaching the Electronic Fuel Injection (EFI) unit, it's essential to confirm that the correct fuel pressure is being maintained. A fuel pressure gauge can help you determine if the fuel pump is functioning correctly and providing sufficient fuel pressure to start the engine. Low fuel pressure can result in a no-start condition.

Inspect the fuel injectors: Clogged or malfunctioning fuel injectors can prevent the proper delivery of fuel to the engine, causing starting issues. Consider having the fuel injectors professionally cleaned or tested to ensure they are functioning correctly.

Check the timing belt: A broken or worn timing belt can cause a loss of power and prevent the engine from starting. It's recommended to inspect the timing belt for any signs of damage or wear. If it appears to be in poor condition, it may need to be replaced.

Examine the airflow and intake system: Inspect the air filter and intake system for any obstructions or damage that may restrict the airflow to the engine. A clogged air filter or a blocked intake can affect the engine's ability to start and run properly.

Test the engine sensors: Faulty engine sensors, such as the crankshaft position sensor or camshaft position sensor, can disrupt the engine's timing and prevent it from starting. Consider having these sensors tested or replaced if necessary.

Please check out this guide as well

https://www.2carpros.com/articles/car-not-running-advanced

Please go over this guide and get back to us.