Runs great, then like crap...bad cat? - Saab 900 Bulletin Board - Saabnet.com
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My 86 SPG runs great for about 20 minutes then begins to jerk and feels like there isn't enough fuel reaching the engine. After another 3-5 minutes, the car is undriveable. That is, until it cools all the way back down and then I can start and drive it for another 20 minutes. When it's jerking really bad, I smell a strong sulfur (rotten egg?) odor which I believe is a sign of a bad catalytic converter.
My question is, would a bad cat only act up once the car is at normal operating temperature? Or should I be seeing/hearing/smelling some other signs while the car is warming up?
I've replaced just about every other component on the car trying to remedy this jerking/sputtering problem and reaching my breaking point with this car....
All suggestions are appreciated. Thanks!
Posts in this Thread:
- Runs great, then like crap...bad cat?, Jawerdna , Mon, 29 May 2017 07:18:35 <-- Viewing This Message
- Any news? n/m, U2bC, Sun, 4 Jun 2017 18:01:19
- COMMON PROBLEM... TEMP SENSOR on manifold, Used to be Chaz, Fri, 2 Jun 2017 08:16:36
- Re: Runs great, then like crap...bad cat?, Bernie , Mon, 29 May 2017 17:51:58
- Re: Runs great, then like crap...bad cat?, K-Saab , Mon, 29 May 2017 07:47:37
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