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Old 12-06-2017, 10:03 PM   #2
300+hp on the shelf club
dl242gt's Avatar
Join Date: Jun 2002
Location: S NJ, a suburb of Phila.

Have you put a meter on the o2 sensor and watched the voltage at warmed up idle? Your description of the o2 operation just doesn't sound correct. The signal should bounce around the 14.7 at fully warmed up idle. It should be constantly hunting or oscillating as the controller adds fuel then removes fuel to keep the mixture corrected. A sensor giving just a steady signal at warmed up idle is bad. There is also a test lead wire for LH2.2 dwell. I think it was a red wire on the inside left fender.

Where is the o2 sensor located in your setup and is it heated or single wire?
1982 242 turbo. 340k miles. Good stuff and lots of rust.
1993 245 Classic, 420k 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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