Hey guys,

I recently learned that that "ACE" system on my '04 HSE requires attention.



Today, I had to park on a huge ditch bank. My E-brake held it strongly, so there was no force on the tranny.

Still, when I backed down, my ACE pump starting whining LOUDLY for about 35 seconds. I was in the middle of nowhere, so I drove on after it stopped, and it did fine on the way home.

I just went to fire it back up, and SAME noise. I confirmed once again that it's coming from inside the blakc plastic box under the driver's side doors, and killed it.

Any ideas? Did I make a boo-boo?

THANKS!

Pat

 

The ACE pump is under the hood, it is just like a power steering pump.
The air compressor for the SLS is under the truck.

http://www.roverparts.com/Parts/RQG100041.cfm

 

Well ain't that a turd burd! So I wonder what the heck is whining so bad?? I mean, it's frawkin' LOUD as shiii.

 

Where exactly is it coming from? Does it only happen when you start the truck? Only when the engine is cold?

 

Didn't do it today... I'll keep you posted!

THANKS!

Pat

 

Stop driving it and send me your number.
Your ACE control unit is on the passenger side, under the frame, the SLS is under the drivers side.
You need to figure out what is wrong before you burn something up driving it.

 

It's actually coming from under the hood- I'll take pics later and show you guys.

Pat

 

Sounds like you SAI pump then Pat, under the hood, passenger side, only happens when you start the truck and it has sat for a hour or more, sound's kinda like a vacuum cleaner.
Yes?

 

Spike, that's exactly what it sounds like and where it is- I felt around to try to find where it was sucking or blowing, and couldn't feel anything.

What's the SAI pump all about?

 

Tons of posts on this Pat.
The SAI pump works like a blacksmiths bellows, it forces fresh air into the cats to help them heat up.
Cold cats do not work as well as hot cats, so they force air into the exhaust when the trucks engine temp is bellow "X" degree's.
There is a foam filter on it, when that filter gets clogged it needs to be changed, you can use the foam filter from a lawn mower or from a window a/c unit.