Q: Car cranking but won't start also battery keeps dying

asked by on August 28, 2017

Car cranks but does not start and battery keeps dying. Just replaced battery a couple months ago. Was told it could be MAP Sensor so I replaced that map sensor and it still does the same thing. Checked to see if I could hear fuel pump through gas tank and inside car and I hear it and also checked to see if fuel pump is receiveing pressure and it is. Wondering what else could be the reason my car will not start?

My car has 160000 miles.
My car has an automatic transmission.

If the engine cranks at adequate RPM, be sure there is adequate fuel in the fuel tank and that the fuel is not old. Download any OBD-II trouble codes that have been stored and examine those codes for diagnostic clues. Check for adequate fuel pressure, injector operation, and a spark at the spark plugs. Basically, if the starter motor is turning the engine over rapidly, at sufficient RPM, but the engine does not catch and run, that means that there is an ignition, fuel, air induction, or mechanical fault in the engine that will have to be repaired. Check for vacuum leaks, an air induction fault like a stuck idle air control valve or, considering fuel, check for a failed temperature sensor that must be working properly to signal the PCM to enrich the mixture on cold start. Other possible no start faults are low compression, defective spark plugs, a defective coil(s), a failed crankshaft or camshaft position sensor, a failed throttle position sensor, and a broken timing belt. Regardless of the underlying cause, if you request a no start diagnostic the responding certified mechanic will get the problem diagnosed and repaired for you promptly. Please let us know if you have further concerns or questions as we are always here to help you.

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