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overboost

  1. OVER BOOST? SO MUCH BOOST! Seems okay though

    9-5 Workshop
    Okay, I've searched high and low, read a billion threads (okay, not THAT many, but enough) been from site to site, group to group and I just can't nail this one down. Full story, back in November-ish, I bought my '05 Aero (Automatic), there were issues. It wouldn't boost and had a loud shrieking...
  2. Shawnb52 - Full Nube

    New Member Introductions
    I bought my first Saab, an '04 9-3 Linear. I'm a former Volvo owner, and shade-tree mechanic. I'm from northern Indiana, USA. My 9-3 was sad in his previous life :cry: because he was kept in the stable and not allowed to run free. He was permitted to trot on occasion but never gallop. I call...
  3. How LH 2.4 ECU handles fuel-cut?

    C900 Workshop
    Maybe it's because i'm a newbie or because my english is poor. But I don't understand how LH 2.4 ECU handles fuel-cut during overboost situations since there is no overpressure switch and it doesn't seem to use the boost pressure sensor. What are the symptoms on (heavy loaded) driving when...
  4. Viggen BPC

    NG900 & OG9-3 Workshop
    Quick question, I have tested my BPC by doing 2 tests. On test 1 i disconnected the BPC electronically and took it for a drive. I was getting 1 pound. Then i plugged it back in and took the 2 bottom hoses and spliced them together. I took it for a drive and i was getting 6-7 pounds. Is that...
  5. Wastegate adjustment

    9-5 Performance, Mods & Tuning
    All, Last night i removed the cir clip on my wastegate actuator, and rotated the arm clockwise two full rotations. This is said to have raised the base boost level by .04 bar. driving last night and this morning briefly, i have noticed slightly quicker spool, and more consistent WOT boost...
  6. Overboost Problem Solved!

    NG900 & OG9-3 Workshop
    Good news, after a few misdiagnoses, I have finally fixed the overboost issue on my T5 9-3. My searches and posts originally had me thinking it was the BPC. I attempted to clean BPC using WD-40, and giving it a few good taps to free up the valve; however, that didn't work. Next, I purchased an...
  7. 9-3 idles wierd, stalls, and turbo overboosts.

    NG900 & OG9-3 Workshop
    hey guys i have a saab 9-3 turbo with a boost problem. the turbo would be boosting really low so i read that to check if it is the APC then to check you have to take the hose from the turbo compresser and plug it into the place where the wastegate hose goes. sure enough my car started boosting...
  8. Over boost

    NG900 & OG9-3 Workshop
    Car is a JZW 3+, with Viggen TD04 and big FMIC: I've still got my strange lurch during WOT. New NGK BCPR7es-11 plugs, gapped correctly and a newer DI. It will spike at nearly 30 and drop to about 22 and lurches, like a fuel cut, in that area. I was told the BPC is likely the culprit. I heard...
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