I changed the passenger side motor mount, fuel pressure regulator and fuel filter over the weekend. Now my 2.8 is making a loud turbine-like sound at startup when the motor is cold.

The sound stops after 30 seconds when the secondary air systems shuts off and the motor drops from 1200 RPM to idle.

Might be the SAI secondary air pump? Wondering if I disconnected the breather hose going to the airbox. I think the SAI pump is right next to the motor mount?

Would a faulty fuel pressure regulator cause this? I'm putting the old one back in tonight to see if that cures the problem.

EDIT: Looks like there's a DIY fix: http://forums.fourtitude.com/showthread.php?3751790

 

SAI sounds right...from what I've heard they do make a loud whistling noise when they start to fail. These things do break from time to time, so I'd put my money on that.

 

Mine does that too, **** is super annoying but I'll go to hell before I pay to replace that pump. I'm just waiting it out until I can get the SAI/Evap/secondary O2 coded out lol

 

Hopefully it's just the rivets failing in the pump housing and I can fix it according to the DIY above.

 

I replaced the rivets and problem solved. Cheap fix.

 

Nice! Glad to hear it was an easy fix. I may look into that on mine, but I got a CEL yesterday that I have a feeling is for the SAI pump lol