i have a 2018 f-150 2.7 eco stx with app 60,000 mls i had a p0018 come up a few weeks ago i cleared it, now it can go into a rough idle sometimes under braking and the engine light will illuminate for a few seconds and go off.the plugs are few months old new filter,new PCV oil changed frequently mobil1,its taken very good care of.any thoughts would be grateful on cause or remedy.

 

You need to look up the code description.
It will tell you there is a timing issue between the Crank Sensor and the Bank 2 Intake Cam (A) position signal.
Likely a fault on Bank 2 Intake Cam operation that has to be identified.
Could be the Cam Position Sensor.
The VCT.
Phaser.
Oil pressure low.
Or any One or more.
Good diagnostics is needed and no guess work.
.
Bank 1 has not been implicated yet by coda, but may be later on, if both Banks have wear on the Phasers and need replacement >>if one side does.
How well the engine was taken care of makes no difference to a failure that occurs.
Good luck.

 

some of the earlier'ish 2.7L had a phaser rattle at start-up just like the 3.5L phaser rattle.
If you ignore it, could be a result of the code....
Been a ford engine tech for 32 years, ive seen a thing or 2.....

 

my neighbor has a 2012 with the 3,5 and he has the loud death rattle on start up like you described nothing like that on mine yet.just the bogging down when you start braking,no power wait a minute then goes back to normal.thanks for your reply

 

will look up code history i assume it will be there for recent power loss usually under the braking even though the eng light doesnt stay on so your thoughts are its related to the p0018 that came up few weeks ago? i fully agree the good diagnostics are needed certainly dont need parts changed nedlessly.thank you for your time to reply,

 

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The issue may act in different ways depending on the cause.
Don't rule out the possibility of a second fault being present at the same time to confuse the problem.
Power loss under braking does not describe a possible fault, well enough.
It is it Electrical, Transmission or Engine related.....under Braking?
Good luck.

 

thank you for your insight,i think getting it diagnosed proffessionaly is best way to go there are too many variables that its beyond my decent knowledge that i have gathered over the years very grateful for everybodys insight.

 

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To further expand in deceleration actions the system can do.
A. Fuel Injection is cut off. It's not needed under these circumstances. When Throttle is again added, sometimes there can be a short notable hesitation in fuel >>turn-on.
B. Hill retard may be in play with the Converter locked up pushing the Engine RPM upwards a bit doing the speed retard.
C. Same thing can happen in OD gears and Cruise Control going down a hill to keep vehicle from excessive over speed of the selected speed setting.
Be sure of what you feel and see happening that may be normal actions.
Good luck.

 

thank you for all the info every bit helps