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Matt, Engineer
Category: Car
Satisfied Customers: 20377
Experience:  Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.
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car just died in traffic..fuel pump..starter turns..wont start

Resolved Question:

car just died in traffic, fuel pump is on when ignition is turned starter turns everything car just wont start
Submitted: 5 years ago.
Category: Car
Expert:  Matt replied 5 years ago.

can you tell me what make , model and engine fuel type and size is fitted
Customer: replied 5 years ago.
2003 kia rio standard 5 spd
regular gas
car had a few time in the pas month where it seemed to stutter but then was fine after that. today i was driving and it stopped in traffic. will not start. battery is strong. starter turns the motor and all accessories over with no issue.
pulled the back seat and i can hear and feel the fuel pump turn on and run.
Expert:  Matt replied 5 years ago.

I'd start by checking if the injectors are working during cranking, if they are you can hear them click - its difficult to hear them with background noise so use a long screwdriver like a stethoscope, placing the handle end in your ear and the metal tip against the body of the injector whilst your assistant turns the engine over.
If you can't hear anything check the ECU power is present by measuring voltage at the fusebox and on its relay socket if OK then check the connections to the crank speed sensor and consider replacing this sensor if the wiring / connections look OK

If the car will start using quick/ easi start then this confirms the problem is lack of fuel

Also its worth checking that the electric pump that feeds the injectors is working correctly, it should run for a few seconds then switch off when you first turn the ignition on. If the connections to this are corroded or damaged then the pump could stop at any time. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubt and do the same for the fuse, ideally measure the voltage at the pump and check its getting 12V.
You should be getting around 3 bar measured at the injector rail check to see if the plugs are getting wet indicating fuel is flowing – if not and the injectors are opening then there’s a problem with the pump or the filter or even the pressure regulator
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