Non stock 88 C900 Turbo running very lean - Saabnet.com Bulletin Board
Let me start with the modifications on this car.
2.1 head, intake, fuel rail.
0 280 150 945 injectors
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
posted by 67.158.2...
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.
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 | RandomScreening.com
Your address is: 126.96.36.199 - Using CCBot/2.0 (http://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!