Skip the auto shop - Our mechanics make house calls

Q: My car crank but does not start.

asked by on

Car just shut off no bangs or clunks backfires out the intake when cranking used my scanner snap on ethos pro up to date software it's not reading the rpm changed crank sensor behind the balancer still not reading rpm when I crank it and still backfiring out the intake I have spark and fuel all the other sensors are working when I crank the car I don't know the exact specs for the sensors but they all work

My car has 30000 miles.
My car has an automatic transmission.

Hi there. Check the camshaft position sensor and see if it has failed. Usually the engine will start and run with a partial failed camshaft sensor, however, when the sensor has failed completely and lost communication to the computer, then the engine will not start. Also check the Mass Air Flow Sensor (MAF) and make sure that it is working. Unplug the sensor and see if the engine will start. If the engine starts with the MAF sensor unplugged, then replace the MAF sensor. If you need further assistance with your engine backfiring, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My car runs and shifts gears but will not move what can be problem 1995 Pontiac Grand Am

Hello - check for problem codes, whether the Check Engine light is on or not. Most auto parts stores will do this for free on a "time-available" basis. It is possible a component of the shift linkage in the steering...

Q: Push button won't start car, new battery

This may be related to a couple of different possibilities. You may have a faulty starter relay or possibly a bad ignition starter switch. The starter relay directs power from the battery to the starter solenoid which then engages the...

Q: Vehicle won't start...one click.

Hi there. What seems to be happening is there is a parasitic load on the battery when the ignition key is off. What this means is that something is on when it should be off. To check this condition, first...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...