black plugs. - Saab Performance Bulletin Board - Saabnet.com
The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 5/23: SOC Day Pass Winners Announceed
[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Clubs | Other Cars | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Manuals | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

Performance Bulletin Board
[Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main Performance Bulletin Board | BBFAQ | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
black plugs.
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by sloopjohnb (more from sloopjohnb) on Thu, 22 Mar 2007 09:39:48 Share Post by Email
In Reply to: Re: what makes you think there is carbon on it?, 91 900 AERO Convertible, Thu, 22 Mar 2007 09:33:54
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

Definite overfueling. I'd solve the overfueling problem before I worried about decarboning the engine. That will go a long way toward removing combustion chamber carbon deposits anyway.

Other carbon deposits IMHO that are worse are the fuel deposits on intake valves. Usually a high quality high octane fuel has adequate detergents to clean them up but if not techrolene can help or some other deposit cleaner, amsoil PI works well and then there's amsoil PowerFoam.

In the old days we just poured a quart of cold water in a thin stream in the old Holley while the engine was running at about 3K rpm. Thermal shock (not to be confused with hydraulic shock that breaks engines) of the water hitting the hot bits and going into steam in the combustion chamber blasted the combustion chamber clean. Today, maybe not such a good idea (did you ever see how clean an engine with water/alcohol injection is??) because the carbon particles so loosened/blasted out can clog a catalytic converter. Your mileage may vary.

But I'd fix the black plugs issue first. Check for induction system leaks, bad fuel pressure regulator,etc.

posted by 140.185.5...

Posts in this Thread:
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup
Post a Followup

No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.

Name: Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.

Subject:

Posting rules are simple - No for sale/wanted ads may be posted here - use the site classifieds.
You may not cross-post your message to multiple BBs.
Not permitted: political/religious topics and being disrespectful (personal attacks, insults, etc...).
 Site Members do not see any red text, inline ad links, bottom of page anchor ads, box ads, or anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the Saabnet.com Classifieds)
Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).

Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post above, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).
Optional Link: (e.g. http://www.saabnet.com/)
Link Title: (Optional)
Optional Photo/Image Link: (e.g. http://www.saabnet.com/img.jpg)
Photo/Image to Upload: (Please be patient while file uploads)



StateOfNine.com
SaabClub.com
Jak Stoll Performance
M Car Covers
Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

Random Saabnet.com Member Gallery Photos (Click Image)
This is a moderated bulletin board - Posting is a privilege, not a right. Unsolicited commercial postings are not allowed (no spam). Please, no For Sale or Wanted postings, SERIOUSLY. Classifieds are to be listed in The Saab Network Classifieds pages. This is a problem solving forum for over 250,000 Saab owners, so expect to see problems discussed here even though our cars are generally very reliable. This is not an anything goes type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the Saabnet.com Mission and Purpose Page. Please remember that you are not anonymous. Site Contact | Site Donations | Other Sites by SP - Poverty2Prosperity.org | Run Club Menlo Park | ScreenBot


Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all the Site Membership Benefits!