Got P1128/P1130 at idle.

[timqqt]

Originally Posted by Jager

AOS is suspect.

At idle remove your oil fill cap... Is it difficult to remove? After removal does the opening sound like a Shop Vac? Put your hand over the opening... Is there a lot of suction?

Yes. A lot of suction. And I can hear that if I open the oil cap. The engine runs lean.

I can hear the leak is around the AOS. I may do a smoke test. Thanks!

[Jager]

Originally Posted by timqqt

Yes. A lot of suction. And I can hear that if I open the oil cap. The engine runs lean.

I can hear the leak is around the AOS. I may do a smoke test. Thanks!

Check the connections on the AOS but most likely you will need to replace the AOS . I have replaced five of them over the years on my vehicles. When you live at lower elevations, near the coast, the AOS failure rate is high. There are very few AOS failures in Colorado.

[timqqt]

Originally Posted by Jager

Check the connections on the AOS but most likely you will need to replace the AOS . I have replaced five of them over the years on my vehicles. When you live at lower elevations, near the coast, the AOS failure rate is high. There are very few AOS failures in Colorado.

What does it mean if there is a suction when I open the oil cap?

[Jager]

Originally Posted by timqqt

What does it mean if there is a suction when I open the oil cap?

If there is a lot of suction, like a shop vac, the Air Oil Separator is bad.

[timqqt]

Originally Posted by Jager

If there is a lot of suction, like a shop vac, the Air Oil Separator is bad.

My local said it is the problem of an intake hose. Do they scam me?

[Jager]

Originally Posted by timqqt

My local said it is the problem of an intake hose. Do they scam me?

What does your local specialize in??

The diaphragm inside the AOS is cracked.

[timqqt]

Originally Posted by Jager

What does your local specialize in??

The diaphragm inside the AOS is cracked.

They specialize in volkswagen. Here's the pictures of the leaking hose they said. I am confused that these hoses are before the MAF. The air should be adjusted. Thanks for any help!

[Gilles]

Originally Posted by timqqt

Yes. A lot of suction. And I can hear that if I open the oil cap. The engine runs lean.

I can hear the leak is around the AOS. I may do a smoke test. Thanks!

Tim, perhaps you may want to check (/replace..?) as well the accordion tube that connects the AOS with the engine block as this plastic gets brittle with age.
.

[Jager]

Originally Posted by Gilles

Tim, perhaps you may want to check (/replace..?) as well the accordion tube that connects the AOS with the engine block as this plastic gets brittle with age.
.

A new AOS will come with one.

[Gilles]

Originally Posted by Jager

A new AOS will come with one.

Jager, I was talking about the long accordion hose that goes from the AOS to the block just behind the driver (4-6 bank).

When I replaced the AOS on my 987CS I had to buy the accordion hose as I damaged mine..
.

[Jager]

Originally Posted by Gilles

Jager, I was talking about the long accordion hose that goes from the AOS to the block just behind the driver (4-6 bank).

When I replaced the AOS on my 987CS I had to buy the accordion hose as I damaged mine..
.

987?? This is a 986 Forum! I assume Tim has a 986...???

We are not prejudice of our 987 Brothers... All are welcome here on this site. :dance:

[Starter986]

Originally Posted by Jager

A new AOS will come with one.

Is that right? Never heard of it... never seen it. From where? I replaced my AOS a couple years ago... Pelican... and it came with no hose (the updated hose). I had to purchase that separately... another ~$35.

Link? Proof? Thanks.

[Jager]

Originally Posted by Starter986

Is that right? Never heard of it... never seen it. From where? I replaced my AOS a couple years ago... Pelican... and it came with no hose (the updated hose). I had to purchase that separately... another ~$35.

Link? Proof? Thanks.

They used to... The AOS came with the accordion shaped hose.

I have not replaced an AOS in the last 4 years so things must have changes. Does not surprise me, the parts suppliers look for more ways to gouge us.

[Starter986]

Originally Posted by Jager

They used to... The AOS came with the accordion shaped hose.

I have not replaced an AOS in the last 4 years so things must have changes. Does not surprise me, the parts suppliers look for more ways to gouge us.

I see my confusion. I thought you were referring to the hose/tube that connects the top of the AOS to the intake... and I was wondering what you meant by "included". Then I saw your post and realized you were talking about that hose at the bottom of the AOS... yes, the accordian. That and the clamp seperately I purchased. Fromn Pelican.

That top tube I had to replace because the AOS had been redesigned since the original. That tube cost me ~$35. I had a fix in place (the original tube with a section cut out and a piece of hose clamping the two pieces together). My OCD took over and I couldn't stand that ugly part snaking across the top of the motor.

[Jager]

Originally Posted by Starter986

Is that right? Never heard of it... never seen it. From where? I replaced my AOS a couple years ago... Pelican... and it came with no hose (the updated hose). I had to purchase that separately... another ~$35.

Link? Proof? Thanks.

Shows the hose in the photo:

https://www.pelicanparts.com/More_Info/99610702304M100.htm?pn=996-107-023-04-M100&bt=Y&fs=0&SVSVSI=1048