i know vct selnoids can affect the way my 04 f150 erforms but could one or both of these being bad cause a non-start problem???

 

It's more likely a corroded FPDM.

 

already replaced the fpdm and fuel filter and fuel pump and crank sensor and spark plugs and theres no codes also has a rough idle often so i was thinkin cam sensor or vct solnoids.

 

ANYONE have any ideas?

 

2004 f150 Lariat 5.4L 4x4 65K

Got my bank 1(passenger side) solenoid out. Cleaned with carb cleaner, wd40'd, carb cleaner, wd40'd ... seems clean now, it was dirty and sludgy looking before.

Now how do i test it?

I know these aren't under constant voltage, and that they are pulsed. I read constant voltage for too long can fry them.

To test, Do i just use my vehicle's battery power and quickly/briefly make a connection to the 2 connector on the vct? Or does it use some other regulated voltage from the vehicle ..... i don't wanna fry a 150 dollar part for nothing after all?

So how do i test this thing?

 

I had some timing codes on my old engine, they had replaced my VCT solenoids, cam phasers and a few other things but never got it figured out. they eventually just put in a used engine in it instead..