SAAB Stalls and Shudders

Tiny
RUBY
  • MEMBER
  • 1999 SAAB 9-3
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 172,500 MILES
Hi,
My brother-in-law has a '99 Saab 9-3 that has had some odd problems. A year or two ago it stopped running (I'm sorry, I don't remember the particulars) and was having air conditioner problems, so the compressor was replaced and it ran fine again for some time. More recently the engine started stalling when at a stop, but primarily only when the air is on. And the air conditioning works fine otherwise, as does the engine. Just not together. Giving it some gas when stopped if it starts to die does keep it going, but that's not exactly ideal. It also shudders when taking turns quickly (around 30 mph, he said), but it's not clear whether the problem is the shocks or what. My dad had something similar happen on a '90 Toyota Celica and the problem turned out to be the half shaft. What do you think is going on with all this? Are there known problems?
Thanks!
Tuesday, January 4th, 2011 AT 5:43 AM

4 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
There are no common problems. As far as the vibration when turning, does the vehicle make a clicking sound when making a sharp turn?

As for the idle, have any warning lights come on? This issue could be something as simple as a vacuum leak or a problem with the idle air control valve.

Let me know.
Joe
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Tuesday, January 4th, 2011 AT 1:21 PM
Tiny
RUBY
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Nope. It just vibrates. Also, it doesn't matter which direction you're turning, it still does it when turning quickly in general.

No warning lights are on either. And like I said, the air conditioning actually works fine still this time around.
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Wednesday, January 5th, 2011 AT 7:07 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
It sounds like the engine idle is getting low enough to cause you to feel it vibrate. Does the tachometer drop really low when this happens?
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Wednesday, January 5th, 2011 AT 2:00 PM
Tiny
MNTHNY4
  • MECHANIC
  • 612 POSTS
Has per stalling replace your engine crankshaft position sensor & the shudder is your passenger side inner axle driver worn out, get this replaced & u r good to go, good luck.
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Friday, January 7th, 2011 AT 3:53 AM

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