Q: Crank shaft and fuel pump problem.

asked by on

After changing the crank shaft in a 96 Jeep Laredo, 4 wheel drive, 6 cylinder; if it's loose child that damage it? Also, why would the fuel pump stay on all the time? Thanks in advance
My car has an automatic transmission.

Hello.

If you are referring to the engine crankshaft, then yes, a loose crankshaft can definitely cause damage. A loose crankshaft means that the bearings or journals are worn, which will continue to wear, usually at an accelerated rate until engine knock develops. A fuel pump may stay on if there is some sort of electrical short feeding it power. This can happen due to a faulty relay, or a shorted wire.

Regards,

Eduardo YourMechanic

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
  1. Home
  2. Questions
  3. Crank shaft and fuel pump problem.

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 have a misfire from cylinder 1and 5. I replaced the coil pack and all 6 plugs and still have the misfire codes P0132 and P0135

Hello. Check the crankshaft position sensor and the distributor for slop in the distributor drive next, which can cause mistiming and misfire issues as well. A certified technician from YourMechanic can come to your car's location to diagnose the misfiring...

Q: 2005 JGC want start after replacing starter and relay

Hello. The clicking noise that you are hearing is the starter not being able to work correctly. This may be due to poor starter alignment, or not enough power. Alignment can be changed with a shim. A lack of power...

Q: Q: Engine only cranks

The ignition system on these vehicles and engines have many issues that may cause the no start. The first thing to check is the distributor cap and rotor for burn through. If okay, then the coil, ignition module and starter...

Related articles

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 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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...