injector pre-cycle buzz sound.

[RiverSide]

my injectors sound a little weak,it is not like most youtube vids i see.
My ficm shows KOEO 48 on start up 47,5 and stays there...i did do the resolder repair.before the resolder lowest voltage i,ve seen was 43V.

today was 17 fahrenheit and it fires right up.
I do run a looney tune and tried to check the fuel pressure unfortunatly i didn,t have the right adapter.I do not know if fuel presure is related to the buzzing sound.

what do you guys think?
are my injectors on the way out?

P.s i use archoil 9100 & 6200 and a synt oil.

[southend]

Are you able to see the voltage right as you turn the key while they are buzzing? How are you monitoring?

Sent from my phone that somebody didn't help me get.

[RiverSide]

edge insight cts

[southend]

Originally Posted by RiverSide

edge insight cts

It's nearly impossible to catch the buzz cycle voltage on the cts, maybe thats where your problem is. Less than 46v, your in failure territory. You can pop the cover and check it there.

Sent from my phone that somebody didn't help me get.

[04cr450]

what is your battery voltage? 17 degrees is chilly willy and at that temp the injector buzz is going to sound different. I know mine does at temps in the lower 30's. You say it fires right up.. Think you are fine.

[RiverSide]

Battery voltage 11.6 on koeo ficm shows 48 and 47,5 when i turn the key/start.
no codes on the edge cts & sct.during the pre-cycle i can hear the injectors rattleing
but it sounds a little weak,about the same level as the vacuum pump.
well so far so good,..i was just wondering if they were going bad.
but i don,t think all 8 go at the same time.

[04cr450]

sounds all good to me but just to confirm take a video of the injector buzz. Dont want to mislead you

[04cr450]

trust me if you had all 8 injectors going bad, your ficm would be bad as well and truck would not start- if it did run the engine would shake rattle and role. Meaning run terrible