Occasional Low Boost - Saabnet.com Bulletin Board
2008 9-5 wagon, 85k miles. A few months ago, the DI cassette suddenly failed, melting the catalytic. I've replaced:
Crank Position sensor,
Downpipe and catalytic (3" Taliaferro)
Turbo bypass valve
Boost pressure control valve
The car drives well, but every couple of weeks, I'll have a day or two where there's not much boost. The gauge will either not go past 1/3-1/2 boost, or boost to red, then right away fall back to 1/3-1/2 boost. I think this happened prior to the DI cassette failing, but honestly, I don't recall. I tossed in a bottle of fuel injector cleaner (Chevron) and cleaned the air mass meter a couple of weeks ago, and it's been pretty good. Then today, it acted up again (the low boost seemed to be worse in higher gears, with 1st-3rd not too bad, but 4th and 5th being worse.
Any ideas would be greatly appreciated!
posted by 72.9.11...
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 -
Your address is: 18.104.22.168 - 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!