Re: It is sufficient... - Saab 9-5 Bulletin Board - Saabnet.com
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Re: It is sufficient...
Posted by dtech (more from dtech) on Fri, 7 Mar 2003 17:34:10
In Reply to: It is sufficient..., Keegs [Profile/Gallery]
, Fri, 7 Mar 2003 16:53:20
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For the most part I agree with what you say. If I correctly understand the Saab combustion analysis system, one of it's main functions is to recognize conditions which cause pinging, and make the timing, boost, mixture adjustments to eliminate/minimize pinging.
If I run lower than 87 octane, I can sometimes hear a slight ping, but it is really in very subtle uneveness from the engine during acceleration that I know there is some minor knocking occuring, but the trionic keeps it to a almost undetectable level.
What I may not agree with is that all the 9-5 knock with less than premium. Pre ignition has been known to occur in some engines, and other engines not occur. The engines would appear to be identical , and running the same octane. Pre ignition also is influenced by a number of factors such as air temp, humidity, etc.
posted by 204.32.206...
Posts in this Thread:
- Pinging upon acceleration..., Hammer, Fri, 7 Mar 2003 15:30:54
- injector and combustuon chamber deposits, Dean, Sat, 8 Mar 2003 11:42:24
- Re: Pinging upon acceleration..., TG, Sat, 8 Mar 2003 09:17:26
- Re: Pinging upon acceleration..., Jason 0W-40, Sat, 8 Mar 2003 04:10:23
- My 99 2.3LPT pings and dealer has done little (longish), Pat Hurley, Sat, 8 Mar 2003 03:24:12
- When did you change your spark plugs?, J, Sat, 8 Mar 2003 00:05:10
- Re: Pinging upon acceleration..., dtech, Fri, 7 Mar 2003 23:45:23
- MILES !!!!!!!! inyour post ????, TG, Fri, 7 Mar 2003 19:21:18
- Re: Pinging upon acceleration..., Chris M, Fri, 7 Mar 2003 18:59:57
- It is sufficient..., Keegs , Fri, 7 Mar 2003 16:53:20
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