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Old 10-04-2017, 09:23 PM   #1
Supersneak
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Default Mystery plug

I've got an 88' 740 Turbo. I'm wondering what this plug goes to, its mounted on the top of the head. and it goes down to the front left side of the Bell housing.



I don't think this model is equipped with TPS, at least not top mounted.
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Old 10-04-2017, 09:25 PM   #2
supreme940
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https://i.imgur.com/GF5keqKl.jpg

^ put a lowercase L at the end of the string before the period for a smaller version
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Old 10-04-2017, 09:28 PM   #3
Supersneak
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Thanks! Imgur wasnt wanting to resize for me
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Old 10-04-2017, 09:54 PM   #4
reed
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Factory timing light
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Old 10-04-2017, 11:40 PM   #5
dl242gt
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The volvo scope tool connects there. You won't ever need it.
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Dave,
1982 242 turbo. 338k miles. MVP coilovers and 3" exhaust. Flowed 405 with a V15. Cossie turbine housing with upgraded compressor housing. 90+, IPD remote oil filter. Some other goodness, too. Been lots of fun over 25 years. Restored in 2k. Now ready for a 2nd restoration.

1993 245 Classic, 435k miles, enem V15. IPD bars and chassis braces. Simons sport exhaust from Scandix. sbabbs ezk chip. Been a good road warrior. Genuine Volvo rebuilt leaky M47.
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Old 10-05-2017, 09:48 AM   #6
ZVOLV
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This topic comes up frequently. It's a TDC sensor for test purposes. Not needed.
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