Skip the auto shop - Our mechanics make house calls

Q: engine cranks will not fire, why?

asked by on

car will crank but not start when hot, new coil pack plugs and wires, batt. good, not getting fuel to fire up. took to autozone and codes came up for transmission temp sensor, and fuel evaporation sensor. when car is cold it will fire up and run ok, after some time will idle weird and has stalled to not start again when parked until cools down. any help is greatly appreciated thank you.

My car has 113000 miles.
My car has an automatic transmission.

A: My best guess would be the crankshaft posit...

My best guess would be the crankshaft position sensor. I have seen this part fail before without setting a code. It is located on the left side of the engine block, (front of car). It is near the exhaust manifold so it is exposed to more heat than in other locations. It can be replaced with the car on the ground, and nothing is really in the way to access it.

Sometimes you can see that the wire harness is coming apart very close to the sensor to verify it is bad, but with your symptoms, I would just replace it. The codes that were stored do not effect the engine’s ability to run, but you may want to have the codes diagnosed after the engine is running properly. Once again, this is an educated guess. There are some other less likely issues that could cause this. If you would like a professional to inspect your vehicle for you, a technician from YourMechanic can come to your home or office to diagnose your engine misfire and replace your crankshaft position sensor if necessary.

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: Car was running fine with no problems. Only on first start up I would have to let the car warm up do to a 2005 Nissan Altima

Hi there - stalling while driving indicates a heat-related failure; quite possibly the crankshaft position sensor, ignition module or fuel pump relay. First task is to check for problem codes, whether the Check Engine light is on or not. A...

Q: Car stalls out of nowhere

Hello - what a frustrating problem to solve! You may have provided a key clue to the solution, given that it requires another vehicle to jump start it to get it going again. This MAY mean that the increased starting...

Q: Engine noises at higher rpms.

Hello. If your engine is making sounds at higher rpm it may be possible that the issues are mechanical. The first thing I would do is check the engine's oil to make sure that it is at the proper level....

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...