Skip the auto shop - Our mechanics make house calls

Q: Crank Shaft Sensor and Fuel Pump Issues.

asked by on

1996 Jeep Laredo, Four-wheel drive, 6 cylinder After changing the crank shaft cylinder, if loose, could it be damaged?

Also, why is the fuel pump staying on all the time? Thank you in advance.
My car has an automatic transmission.

Hello. A loose crankshaft sensor may be damaged if it falls off or catches on something. Aside from that, a loose crankshaft position sensor may also cause engine performance issues, including stalling, as it is one of the primary inputs for the engine management system, and needs to be secured near the crankshaft in order to function properly. A fuel pump can stay on all the time if the ignition switch, relay, or a wire short, and feed it power. I would check the relay and wiring to see if they may have an issue. A certified professional from YourMechanic can perform a comprehensive inspection of the vehicle in order to pinpoint the correct repairs for these problems.

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

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: I replaced new fuel pump and filter and ran good for two days and now it won't start

The fuel pressure should be checked to see if the new fuel pump failed. If pressure is below 40 psi when the key is turned on then replace the fuel pump and filter. When the tank is out you should...

Q: There is a strong knocking sound coming from the engine. Today my car won't start. Service engine light is on. It keeps turning over

Hi there. When the crankshaft position sensor is damaged or faulty, it will cause intermittent starting issues, misfiring problems, or might cause the vehicle to fail to start entirely. The best way to resolve this issue is to contact a...

Q: intermitant failure to "fire up"

I would suggest check to be sure the Mass Airflow (MAF) sensor is working properly. The symptoms you are describing are very common when this fails. As you may know, this regulates the flow of air into the engine allowing...

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 are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.