B200F Idle Speed & Timing?

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B200F Idle Speed & Timing?

200 Series General Forum for the Volvo 240 and 260 cars

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Mar 31st, 2020, 22:16	#1
CosmicBike Senior Member Last Online: Yesterday 11:07 Join Date: Dec 2019 Location: Surrey	B200F Idle Speed & Timing? I'm intrigued by a couple of things with my 240. A 1993 Tors, so the 2.0 lump and LH2.4. I've read that the timing cannot be adjusted, and that the LH2.4 system deals with it. Now I just replaced the timing belt, the old one was 1 tooth out, which must have affected the timing by virtue of the aux shaft driving the dizzy. The dizzy mount is slotted, which suggests adjustment is available. Can anyone confirm or deny this? Also wondering what defines idle speed. Appreciate it is managed by the IAC valve when the TPS says the engine is off throttle, but what defines the desired rpm, which I assume is measured electronically, again presumably via the CPS? Just trying to get to grips with how it all works...

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