Cam position sensors

[PC_GUARD]

Is it possible to have failing cam sensors and not throw codes?

If yes, what's the best way to diagnose?

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[engineermike]

You can plot desired and actual cam position for all 4, but that wouldn’t narrow it down to just a bad sensor. Why so you suspect you have a bad one?

 

[PC_GUARD]

You can plot desired and actual cam position for all 4, but that wouldn’t narrow it down to just a bad sensor. Why so you suspect you have a bad one?

inconsistent torque, and random stalls. Something thats been in the back of my mind since buying the car in march. Everything is great, love the car, sometimes its pulls so hard it snaps your neck on a shift, and other times (always with the nannies off) it just seems loud with no "pull"

 

[engineermike]

Dozens of things could cause that. Cam position sensors are pretty reliable, though.

 

[PC_GUARD]

Dozens of things could cause that. Cam position sensors are pretty reliable, though.

Any thoughts on other possibilities?

 

[engineermike]

I don’t think you can tell anything without a good log. I log with vcmscanner. You’ll need to see what the lambda, spark timing, throttle position are doing. If that checks out then move on to cam positions.

 

[PC_GUARD]

I don’t think you can tell anything without a good log. I log with vcmscanner. You’ll need to see what the lambda, spark timing, throttle position are doing. If that checks out then move on to cam positions.

I just ran a log, i'll look at it myself as well as send off to the tuner.

 

[Zrussian13]

inconsistent torque, and random stalls. Something thats been in the back of my mind since buying the car in march. Everything is great, love the car, sometimes its pulls so hard it snaps your neck on a shift, and other times (always with the nannies off) it just seems loud with no "pull"

False knock could cause the loud with no pull but wouldn't explain the random stalling.

 

[Cobra Jet]

The (3) most common Coyote issues that could result in stalls or operational issues:

- VCT solenoids - if the solenoids are not operating properly due to debris or they are failing due to age, they can cause such codes. Quite a few threads on here about these prematurely failing and/or how to diagnose.

This most recent thread, the culprit was the VCT solenoid::
https://www.mustang6g.com/forums/th...s-and-cam-retarded-codes.176734/#post-3571964

Here's (2) more threads for VCT info that I had previously posted in other threads:
https://www.mustang6g.com/forums/threads/2015-2021-s550-5-0’s-ssm-50067-vct’s-again-various-dtc-codes.169419/

https://www.mustang6g.com/forums/threads/p0018-code.123932/

- IMRC failure - this design has been problematic since the IMRC intake system first debuted in the 1994 Lincoln MKVIII with the 4.6 DOHC (which was carried into the 1996 Cobra and beyond). Theres MANY threads on here regarding the intake and IMRC system.

- Crank sensor - failure can be the sensor itself, the harness to it or the pins in the connector. If the crank sensor is failing, it also will throw various misfire DTCs. The only time the crank sensor will throw a specific crank DTC is if the sensor is disconnected or it has completely failed. Many have found even with a generic misfire P0300, that the issue was related to the crank sensor. These sensors do not last forever due to their location and under hood heat cycles.
Check this thread:
https://www.mustang6g.com/forums/threads/misfire-at-high-rpm.174380/#post-3531453

AND this one:
https://www.mustang6g.com/forums/th...e-sensor-tone-ring.156234/page-2#post-3197692

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