Shut off, cranks will not start

1999 DODGE DAKOTA
250,000 MILES • 3.9L • 6 CYL • 2WD • AUTOMATIC
Avatar
JAMES CHAMBERS
  • MEMBER
  • 1 POST
Replaced plugs and wires, coil. What else could be the reason for cranking but no start. Fuel pump comes on with fuel I fuel rail.
Jun 24, 2021 at 6:58 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
Hi,

Chances are you lost spark. See if it starts for a couple of seconds using starting fluid. If it does, then it's likely not getting fuel (low pressure or injector issue). If it doesn't try to start, check for spark. Here is a link that explains how it's done:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

If you find there is no spark, using a live data scan tool, see if there is an RPM signal when cranking, or if it has a tachometer, see if it moves slightly when cranking. If you find it doesn't, it's likely the crankshaft position sensor (CKP).

Here are two links you may find of interest. The first describes common symptoms of a failing CKP. The second explains in general how one is replaced.

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

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

If you look at the attachments below, they provide the directions specific to this vehicle for replacing the CKP.

Let me know if this helps or if you have other questions.

Take care,

Joe

See pics below.

Jun 24, 2021 at 2:41 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.