Re: slight ping then base boost for 5 mins then its clear!?!? - Saab 900 Bulletin Board - Saabnet.com
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Re: slight ping then base boost for 5 mins then its clear!?!?
Posted by Mark J (more from Mark J) on Fri, 13 Oct 2000 14:08:53
In Reply to: slight ping then base boost for 5 mins then its clear!?!?, SB 88SPG, Thu, 12 Oct 2000 18:47:21
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Hey Steve. Not sure about the ping, but I had a similar issue that turned out to be a erratic connection at the knock sensor. Cleaned the terminals...and it never happened again. Took me almost a year to figure it out tho.
Could also be some other "noise" in the engine compartment tripping the knock sensor. Loose cooling fan?..thats a wild guess.
Next time it happens pull over, pop the hood and lightly tap the knock sensor bolt with a wrench or something while the engine is running. The APC solenoid should click like crazy every time you tap. If it does'nt, the APC system is offline, and the fault is not being caused by a knock condition. You will then have to troubleshoot the APC. Good luck!
- Mark
1984 900T
1978 99T
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