Cranking issue, multiple codes

1996 FORD F-150
187,000 MILES • 5.0L • V8 • 2WD • AUTOMATIC
Avatar
CRUISE5020
  • MEMBER
  • 5 POSTS
The truck is having a hard time starting up; it will crank run for a few seconds and shut off. I do this for 5 minutes or so and it will finally run. If it is cold, starts just fine. I pulled codes.

P0401 EGR system low flow vacuum line was off I put it back on.
P0300 random multiple misfires.
P0385 CKP sensor circuit b.
P0171 system too lean bank 1.
P0174 system too lean bank 2.

Running code p1000 on board diagnostic system test incomplete.

Was told to replace CKP crank sensor because when that code is cleared no issue with start hot or cold, but where is it? bought this from Napa css437 crank sensor have no idea location and what I have to remove to get to it. if this was a Ford Ranger I would be done.
Images (Click to enlarge)
Attached Media
Attached Media
Attached Media
Apr 8, 2020 at 8:40 AM
Advertisement
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good evening,

The crank sensor is a misfire sensor. It detects misfires for reference to the ECM.

I attached a picture and posted the procedure for you.

The 300 is a misfire code. The most common cause for this along with the 171,174 codes is low fuel pressure. You need to check the actual fuel pressure when it shuts down.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Roy

REMOVAL AND INSTALLATION
1. Disconnect battery negative cable.

NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the Power-train Control Module (PCM) relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 miles) or more to relearn the strategy.

2. Remove attaching screws and timing pointer.
3. Disconnect wiring and remove sensor.
4. To install, reverse removal procedure. Tighten attaching screws to 8-12 Nm (75-105 lb in).

Image (Click to enlarge)
Attached Media
Apr 8, 2020 at 9:00 AM
Avatar
KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
I think the issue is this is called a misfire sensor and not a crank sensor. Take a look at the attachments for the process and information about it.

Also, here is a guide that covers the basic items on hard starting:

https://www.2carpros.com/articles/engine-cranks-excessively-before-starting

Run through this information and let me know if you have questions. However, I think you are on the right path with the misfire sensor except for the EGR code.

Let me know how you make out with this and we can go from there. Thanks
Images (Click to enlarge)
Attached Media
Attached Media
Apr 8, 2020 at 9:04 AM
Add a reply
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 new question

Frequently Asked Problems for This Vehicle

Advertisement