Re: hesitation at 55 to 70 saga - Saab 9-5 Bulletin Board - Saabnet.com
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Re: hesitation at 55 to 70 saga
Posted by Tim E. [Email] (more from Tim E.) on Tue, 16 Sep 2003 09:38:49
In Reply to: hesitation at 55 to 70 saga, albanysaab, Mon, 15 Sep 2003 07:24:27
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I had to deal with this identical problem for six months, but finally believe I have it resolved. My 9-5 finally gave the "check engine" light, which allowed the dealer to work with Saab to fix the mysterious problem. The "check engine" code revealed a "throttle position sensor out-of-range" error, which they traced eventually to a problem with the butterfly valve in the throttle HOUSING (NOT body) sticking intermittently in the closed postion. [This stickiness prevents the butterfly valve from opening properly under engine vacuum, so with light throttle, minor variations in air flow result - my theory - I'm a mechanical engineer]
The dealer replaced the entire throttle housing (again, I got much wrong advice about the throttle body, which is a passive duct and not involved with this problem). The housing contains the butterfly valve and various throttle actuators.
The car is finally running like new.
I'm interested to see if this information is helpful, so please post a follow up. Best of luck. I certainly sympathize with your aggravation that such a great car can be dimished by poor diagnosis.
-Tim
posted by 198.60.114...
Posts in this Thread:
- hesitation at 55 to 70 saga, albanysaab, Mon, 15 Sep 2003 07:24:27
- Re: hesitation at 55 to 70 saga, Joe , Tue, 16 Sep 2003 13:11:04
- Re: hesitation at 55 to 70 saga, Tim E., Tue, 16 Sep 2003 09:41:29
- Re: hesitation at 55 to 70 saga, Tim E., Tue, 16 Sep 2003 09:38:49 <-- Viewing This Message
- Re: hesitation at 55 to 70 saga, albany, Mon, 15 Sep 2003 11:46:17
- Re: hesitation at 55 to 70 saga, Brian Link, Mon, 15 Sep 2003 09:18:20
- Re: hesitation at 55 to 70 saga, Jason 0W-40, Mon, 15 Sep 2003 08:29:22
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