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surging idle 200 1984

posted by  mikan on  Sun Sep 19 14:00 CST 2004
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last visit: Mon Jul 31 13:44 CST 2000
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I was tuning up my 84 240 (B23F engine) today, and had a problem setting the timing, because the idle speed is not constant. It surges very regularly up and down, about one second up from 700 to 800 rpm, one second back down to 700, one second up, one second down, etc. Or maybe slightly faster (1 1/2 secs complete cycle), but VERY regular. Any ideas?

And am I right in thinking that this is why the timing is jumping around the target 12 BTDC, or could that problem have another source?

I think I was doing everything right - the engine was fully warmed up. Haynes says to disconnect and plug vac hose at the distributor if there is one, but there is only an electrical connection going to the dist.

Thanks in advance for any help. Carl.






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New surging idle [200][1984]
posted by  mikan  on Sun Sep 19 14:00 CST 2004 >


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