Weird Noise at StartUp?

[Fordlover96]

So, the car has always kinda did this noise. It only happens after the car sits outside in the cold, or for a long period of time (like a week.) The car will turn over, start right up, and about a second later will make this weird noise for about a second, then all is fine. It almost sounds like pressure building up and something rattling around during that. Honestly, if its not internal engine related, I'll probably just leave it. Lol

Thanks in Advanced!!

Here's the noise when I used my remote start the other day. The noise is toward the end. Can't miss it.

 

[Pintony]

Sounds like the brake booster reset....

 

[Fordlover96]

^What is that, exactly?

 

[Pintony]

^What is that, exactly?

In your starter post you said that after your SHO sits...
When you get in 'before starting' does it feel like it would if you pumped the brakes several times and used up all the reserve vacuum?

 

[Fordlover96]

I've honestly never thought about if the brakes feel weird before it starts up. Since the video was taken while using the remote start, I'd say it doesn't get affected by the fact that I usually have my foot on the brake when I start the car, out of habit.

Tomorrow morning I'll try pumping the brakes a couple times before I cold start it. See if it helps. Thanks for the info man. @Pintony

 

[Pintony]

Hello Fordlover96,
You need to check the next time your SHO has sat a while like you describe.
Then push the brake pedal 1 time to see if the vacuum reserve has bled off.
pedal should be hard until the engine starts and then move toward the metal.
a bad check valve????...

 

[itwonder]

ABS actuator resetting is my guess.