Q: When I go to crank my car the key stays in the start position and the car is constantly trying to crank itself.

asked by on June 07, 2016

When I place the key in the ignition and proceed to crank the car the key stays in the start position and the car is constantly trying to start itself up but never actually turns over. I then have to manually turn the key back so the car can stop trying to start up. I have had the fuel pump replaced and the crank position sensor. The car worked like normal for one entire day and then the same problem reoccurred. Though I don't think this is the problem but each time the car wouldn't start it was parked on a semi incline in our driveway. But we have parked it her numerous of times before. I am having a mechanic check the fuse boxes today for maybe a relay problem.

My car has 120000 miles.
My car has an automatic transmission.

First, let’s make sure about some terminology before I proceed. I will assume the motor is actually turning over. If the car is trying to start, the motor has to be turning over or it is not trying to start. This is an important distinction when diagnosing the starting system. As a technician, I go to different parts of the system based on this description.

If the key is stuck in the start position, this is a ignition lock cylinder issue and the reason the starter continues to turn the motor over. If the starter is turning but the motor is not, then the starter is likely the problem. Either that or the teeth on the flex plate are all gone. This would require removing the transmission to repair.

If the car runs intermittently, this can be a big challenge. And it also means the starting system is working. It will need to be diagnosed when it is failing. A working car cannot be diagnosed because there is nothing wrong. Where you park your car should not have any affect. It certainly could be a wiring problem. Wiring problems hide really well and can happen anywhere in the miles of wires that are in your car. Isolating the system that is failing is really important here. At the moment I am unsure which system is failing. Starter system, ignition lock cylinder and or ignition switch electrical or something with the engine control system.

When the car is failing, you need to check for spark and fuel pressure. If neither is present, this is a clue. Usually the crank sensor will do this. Does your car have a tachometer? If so, does it move at all when cranking. This is a clue whether or not the cam and or crank sensor is working. Is there a Check Engine Light on with the key on? If there is a Check Engine Light, the code or codes can be used for specific diagnosis.

All of these concerns will send you down a diagnostic path. Be sure not to confuse yourself by misinterpreting multiple system failures. If the key does stick in the start position, this would be the first problem to solve. After that, does the motor actually turn when the starter turns? After that, the question of "Why won’t it start?" is first answered by finding what the motor is lacking. Fuel, spark etc... Good luck.

If you need assistance with these checks, contact a certified mechanic who has the tools and experience needed to properly diagnose this starting issue with your car.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

I have a loss of power and I can't really press on the gas too hard or the engine will start shaking/stalling

The engine may have a vacuum leak in the throttle intake tube between the mass air flow sensor and the throttle body. Or the mass air flow sensor may not be working correctly or is contaminated. Have the computer scanned...

My car keeps overheating

Hi there. There are many components to your cooling system and any of them that are malfunctioning can cause your vehicle's overheating issue. Your vehicle's sporadic shifting is caused by an issue in your transmission. As for the leak,...

Reduced engine power light is on 2003 Chevy Tahoe I need a new battery can that be the problem

A defective battery can cause all sorts of running issues due to voltage is too low or high causing erratic sensor and component performance like low fuel pressure or lack of power. I recommend replacing the battery first if it...

Related articles

A Buyer’s Guide to the 2012 Chevrolet Silverado Hybrid
If If you’re looking for a half-ton pickup truck that also gets great gas mileage, look no further than the 2012 Chevrolet Silverado Hybrid. While it has the towing and carrying capacity you’d look for in any regular truck, it...
The Best Used Cars to Buy If You Love Road Trips
If If you love to travel, comfort is very important in a vehicle. You want a nice, quiet ride, comfortable seating, and enough room. We have evaluated several used vehicles, and narrowed our favorite road trip vehicles down to the...
The Best Used Cars to Buy If You’re a Plumber
Plumbers Plumbers need to carry around all manner of tools and supplies. If you’re plumbing a large building, or even a decent sized home, you’re going to need a vehicle that has quite a bit of cargo capacity. A car...