Crank no start

Tiny
VANDIESEL
  • MEMBER
  • 2002 LINCOLN TOWN CAR
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 136,000 MILES
Koeo fuel pump kicks on for maybe a half of a second, while cranking fuel pump does not kick on also no spark. Checked all fuse and relays all good. I'm at a loss.
Sunday, April 25th, 2021 AT 2:38 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,230 POSTS
Hi,

Do you have access to a live data scanner? If you do, check to see if there is an RPM signal when cranking. If there is no signal, it's likely the crankshaft position sensor has failed.

The vehicle is equipped with an auto fuel shut down. However, if you hear the fuel pump, that isn't the issue.

Take a look through this link. It describes the most common symptoms of a faulty crankshaft position sensor. See if anything mirrors what you are experiencing.

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Also, let me know if you scanned the computer to see if there are diagnostic trouble codes. That could be very helpful.

If you look at the attached picture below, it includes the directions and picture specific to replacing the sensor on this vehicle.

I hope this helps. Let me know what you find or if you have other questions.

Take care,
Joe

See pic below.
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Sunday, April 25th, 2021 AT 9:07 PM

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