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overboost
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  1. Saab 9-3 Sedan/Combi/TurboX/AWD(2003+)/Conv(2004+)
    Hi, I know there have been a few threads on this in the past but I can't see any for the 9-3SS thats weren't fixed by the boost control valve. So here goes.... I have recently upgraded my 1.8t to the TD04-14T (second hand) turbo with larger injectors using maptun td04 stage 2 (as I have...
  2. Saab 9-3 Sedan/Combi/TurboX/AWD(2003+)/Conv(2004+)
    Hi - Haven't needed to ask for help for a long time as the car has been going well. However.... 2006 Saab 93 120 with 43k miles. Turbo replaced about 25k agao, new EGR about 20k ago. Had been going fine although in the lst couple of weeks I have been hearing a whirring noise from the engine...
  3. Saab 9000 (1984 - 1998)
    My question is can you use a manual boost pressure control valve to control the wastegate instead of buying a new apc valve? Would it affect the air/fuel ratio to much? Thanks!
  4. Saab 9000 (1984 - 1998)
    1997 Aero, Maptun stg3 , 170k Developed overboost in past couple of weeks. Boosting to 1.5bar when flooring in lower gears and hitting cutout., didn't seem to boost beyond 1.2 in 5th. Car still went well but you had to take care. All new silicone hoses a few years back so unlikely to be vacuum...
  5. Saab 9-3 Sedan/Combi/TurboX/AWD(2003+)/Conv(2004+)
    Hi all, I have a late '05 9-3 1.9 TiD 150 bhp (105k miles) vector sport which I purchased in the UK about two months ago. Since then I have some of the "usual" 9-3 problems (broken front coil spring, egr valve, serpentine belt tensioners), but last week a new one appeared... I was accelerating...
  6. Saabscene: Performance
    Hi all. I was reading up an advert on Piston Heads recently and saw 9-5 Aero for sale, 2002, face lift job. The ad described it as being a "rare over boost model". What does this mean, if anything? I was aware the older model had a 10bhp overboost for extreme overtaking etc. But didn't think the...
  7. Saab 9000 (1984 - 1998)
    Hi guys, just looking for a bit of advice on the lovely old 9000 CSE LPT 2.0, 1993 vintage. Recently if you put your foot down, the old crate leaps forward with remarkable acceleration and then moments later cuts out briefly and loses all boost. This is no fun when you are overtaking stuff. I...
  8. Saab 9-3 Sedan/Combi/TurboX/AWD(2003+)/Conv(2004+)
    Hi all, Not lurked in ages on here with work etc.. but anyhoo - had 2001 93 Tid for years and years 60k miles :-) had few problems with the odd sensor etc and the dreaded engine light/limp home blah blah but is had 117k on the clock so I sort of expected the odd thing to go wrong 3 weeks ago...
  9. Classic Saab 9-5 (1997 - 2009)
    I have recently bought an aero estate (52 plate but an 03 MY) and whilst I am pleased with the performance of this 95 aero estate am I supposed to get the 20lbs torque overboost (or is it 20 extra bhp) and how do I know if I am getting it becasue it's not obvious and does not feel quite as...
  10. Classic Saab 9-3/GM900 (1994 - 2002)/Conv ( -2003)
    Hi all, this is my first post on this site... so greetings! I have a 2001 9-3 Aero Convertible which has recently started giving me some issues. A few weeks back I started to notice a hesitation which felt at first like a misfire/ fuel supply cut-out. It started to get a little more frequent...
  11. Saab 9000 (1984 - 1998)
    Had a fun weekend messing around with the 9000 at the weekend! Fitted new speakers front and rear, replaced all blown bulbs in the dash which was good (made a massive difference! Also, I have done some prodding around to try and sort out my 3k stutter (see previous thread), and have came to...
  12. Saab 9000 (1984 - 1998)
    Hitting the overboost on my 1990 Carlsson. Where is the [expletive deleted] hiding?
  13. Saab 9000 (1984 - 1998)
    Hi all, I know there have been many other queries on overboosting however none quite match my circumstances. My 93 Aero has done 127K miles and, since Saturday,has started to intermittantly overboost. You can never guarantee when it is likely to do it, even wot in 3rd gear(most frequent)...
  14. Saabscene: Performance
    Recently on my 1996 2.3 FPT Maptun Stg 3 I've hit overboost cutout a couple of times I think. The nearest I can describe the feeling is to compare it to a single backfire on other vehicles I've owned, i.e. big shudder then carries on as though nothing happened when on full throttle. Its...
  15. Saab 9000 (1984 - 1998)
    Does anyone know if the ignition is cut off when the overboost protection activates? Because I'm trying to get my head round whether the ignition system has a fault (the garage thinks possibly the crank sensor is going bad) or the overboost is just doing its job. The tacho drops and effectively...
  16. Saab 9000 (1984 - 1998)
    Does anyone know if the ignition is cut off when the overboost protection activates? Because I'm trying to get my head round whether the ignition system has a fault (the garage thinks possibly the crank sensor is going bad) or the overboost is just doing its job. The tacho drops and effectively...
  17. Saabscene: Performance
    Hi guys, what is the best for the overboost switch, as I'm hitting it quite a lot now on my T8...(0.95Bar as standard on a T8) my daily runner ie APC tweeked on P & F pots 0.80/0.85 Bar in 3rd/4th gear 0.90/0.95 Bar in 5th gear....... my other tweeked APC unit new resistors/replaced...
  18. Classic Saab 9-3/GM900 (1994 - 2002)/Conv ( -2003)
    Do the Viggens have the overboost funtion as the 9-5 Aero's do? If so, did saab document it anywhere for the Viggens? Thanks!! Jason
  19. Saab 9000 (1984 - 1998)
    Recently bought a manual MY96 Aero. Problem is it often hits overboost cut-off. Regularly the boost gauge hits the end of the red and then pulls back to just in the red as the revs rise but every so often it hits overboost. If the battery has been disconnected the adaptation run is a nightmare -...
  20. Saab 9000 (1984 - 1998)
    Recently bought a manual MY96 Aero. Problem is it often hits overboost cut-off. Regularly the boost gauge hits the end of the red and then pulls back to just in the red as the revs rise but every so often it hits overboost. If the battery has been disconnected the adaptation run is a nightmare -...
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