Pelican Parts Forums - SAI CEL FAQ

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Wow, that is a relief. thanks!
don

Good job on the writeup and pics of the plugs etc. I did this combined with the guitar string method that amfab over at rennlist pioneered. Had two ports number 3 and 6 with no airflow. After drilling and flushing they opened right up.

Stan

I've been asked to post the p/n for the Check Valve.

It is 993-113-250-03 $81.25 from our host

I bought an extra one.. (if you need one I'll sell it)

Does anyone know if any corrective actions were taken during dealership rebuilds for SAI issues, that would lessen the likelihood of this issue reoccurring?

One of the receipts from my car's past shows a cylinder head rebuild due to plugged passages. The documentation includes a comment stating: "Drill Secondary Air Passages"

What was the extent of the 'drilling' operation performed? This was a warranty repair @ a dealer.

"What was the extent of the 'drilling' operation performed?"

This implies that the air passages were cleaned by use of a drill
and a flexible wire/cable, e.g. speedo cable, to fully remove the
carbon buildup, which is the common technique used.

Quote:

Originally Posted by shahid sa (Post 6965095)

Download the list of risks available in spreadsheet, really helpful, you can also find few more word and pdf files to download once you open the above link.

seo uk expert

sniff, sniff...Does anybody else detect the distinct odor of SPAM? :rolleyes:

Quote:

Originally Posted by Jascha (Post 3600083)

I have one caveat to add: I would not recommend to the uninitiated to use such high pressure. The risk is that you will blow out the thin-walled plugs (x2) on the manifold body. These are plain steel type, they tend to rust and will surely rapture under extreme pressure and solvent use (see image below)

http://forums.pelicanparts.com/uploa...1195617861.jpg

Agree. With significant mileage it is likely the plugs have already rusted through. The plugs are 14mm & difficult to find. An alternative is a Mercedes Benz p/n: 000000-004054-M22 (available @ Pelican for ~$3)

http://www.pelicanparts.com/cgi-bin/...0000004054-M22

Air leaks into the exhaust due to failed plugs or check valve can cause other problems & should be addressed even if a check engine light is not present. (lean shift in o2 sensor readings, elevated catalyst temperatures, interaction with o2 sensor diagnostics, etc..)

Rebuilt manifold:
http://forums.rennlist.com/rennforum...manifold-2.jpg

Here's another potential failure point that hasn't been discussed:
http://forums.rennlist.com/rennforum...sai-pump-1.jpg

http://forums.rennlist.com/rennforum...sai-pump-2.jpg

Picking up on this thread, as I'm about to do this clean-out on my 993. Any consensus on what fluid to shoot down that SAI port to loosen the carbon build-up?

I have cleaned a few using of all things guitar strings and solvent. I have had several engines where the shops insisted the engine needed a top end. When I did a leak down and compression on the engines I saw no reason to believe it needed it. The engines did not consume oil or burn any we could tell. With a little patience and after dropping the exhaust I was able to work the guitar strings through the passages cleaning them. I also repalced the SAI valve. No more cell and when we dyno tested one engine with 123k miles on it, it showed factory numbers on a mustang dyno.

I can't tell you how many I know that went the top end route. They got what they paid for but what is it needed?

There is a nasty product that breaks down carbon buildup called chem dip. It will remove any buildup and make it look like new. It is intended to be used in a can but you can soak the strings in it and it helps break everything down.