Date: Sat, 20 Sep 2003 00:43:21 +0200 From: Robert Brown <roxxxbert.brxxxownnopsamxipnet.se> Subject: 9-3 Boost problem /solenoid valve?
Hi all, I need your guess on a diagnosis: Car is 1999 9-3 SE 200hp. Acceleration is sluggish, turbo gauge indicates half way into yellow, at max throttle in 3rd, 4th, 5th, between 2000 and 5000 rpm (i.e. not reaching boundary between yellow and red at anytime, regardless of gear or revs). Disconnected wastegate pipe from solenoid valve (the black thing with three hoses and electrical connector attached, known as "magnetventil" in Swedish) and floored the gas pedal, but boost does *not* shoot way up into the red, as it should. Reassembled. Detached the circlip and wastegate arm to confirm that wastegate on turbo moves freely (it does). Reassembled, lots of copper grease. Took the whole thing to the repair shop and got following results: Saab dealer confirmed base boost 0,24 bar, max boost 0,6 bar (should be 1,0 by the way). But they note - no leaks in intercooler circuit, no engine error codes, exhaust pipe was disconnected to check turbine (they say it's OK), wastegate examined (OK as well). Hoses checked for leaks (none). The only thing they could not do was check the solenoid valve, nor did they have a spare with which to test the car. So they could not reach a conclusion, but said they suspect the solenoid valve. Of course I ordered one and it will arrive on Tuesday (at EUR 40, it's a cheap test), and I will take 5 minutes to install it at home. So until then, I am wondering whether all these symptoms really *do* point to a failed solenoid valve. I'd thought that the *absence* of excessive boost upon disconnecting the wastegate pipe from the solenoid valve would have indicated a fault elsewhere. What do you think? TIA, Robert Gothenburg Sweden
 |
 |
 |
 |
 |
