Non stock 88 C900 Turbo running very lean - Saabnet.com Bulletin Board


[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Performance | Detail | Clubs & SOC | Other Cars | Books Movies & Music | Chat | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Service/Mechs | Manuals | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

Performance Bulletin Board
Search:
(Search Author's Posts: e.g. Keyword:Author)*Members Only


[Main Performance Bulletin Board | Post Followup | BBFAQ ] [ Prev by Date ] [ Next by Date ] Member Login / Signup [Most Recently Edited Saabnet.com Photo Galleries]
Non stock 88 C900 Turbo running very lean
Posted by JamieP [Email] (more from JamieP) on Mon, 30 Mar 2015 14:53:57
Alert me when someone posts in this thread:

Hello everyone

Let me start with the modifications on this car.
2.1 head, intake, fuel rail.
RRFPR
0 280 150 945 injectors
9000 intercooler
AID unit
custom mandrel bent exhaust
Innovate wideband o2 sensor
Swedish Dynamics red series turbo
The engine broke a piston a couple of years ago due to this issue, now with it rebuilt I need to figure this out.
This is whats happening, at idle the afr is around 13.0 and the instant the throttle opens it can spike as high as 17.0 and then settle down to 15.0 with the throttle still part open. Under boost it will stay at about 15.0 (I've limited the boost to 7 psi with a manual controller). Under no circumstances can i get it to run any richer. I've adjusted the ohms on the AMM very high, ive also turned the RRFPR over 40 psi at idle, both make it idle richer but once the throttle plate opens it leans out to 15-16 and stays there. This makes me think there's a vacuum leak but I cannot find any, Ive replaced all the intake grommets, the hoses and checked all the intake ducting. Ive also replaced the fuel pump, O2 sensor,throttle position sensor, swapped ecus, swapped AMM's, it consistently runs the same. I am totally stumped with this one.
Thanks for any suggestions

Jamie

posted by 67.158.2...

Posts in this Thread:
Alert me when someone posts in this thread:

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 [Most Recently Edited Saabnet.com Photo Galleries]
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.
If you use GMail, follow these instructions from Google so that they appear in your regular inbox.

Subject:

Posting rules are simple - No for sale/wanted ads or live auctions may be here - use the classifieds.
You may not cross-post your message to multiple BBs.
Personal attacks, insults, or flaming are not allowed.
Site Members do not see any red text, inline ad links, skyscraper ads, box ads, nor anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the TSN Classifieds)
To add inline links to your post, use [link]http://www.domain.com/[endlink] or use the Optional fields below.
To add inline images to your post, 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/)
To promote your own Saab site here, you must have a link back to The Saab Network.
Link Title: (Optional)
Optional Image Link: (e.g. http://www.saabnet.com/img.jpg)





The content on this site may not be republished without permission. Copyright © 1988-2018 - The Saab Network - saabnet.com.
For usage guidelines, see the Saabnet.com Mission and Purpose Page.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

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
Your address is: 54.162.239.233 - Using CCBot/2.0 (https://commoncrawl.org/faq/) - Logged.
Site Members do not see red text instructions, skyscraper, nor box ads.
Click here to see all the Site Membership Benefits!