Hi Alan:
Check for a vacuum leak or a float level problem. You can spray WD-40
around gasket surfaces and on throttle shafts to see if rpms rise which
would indicate a leak. You can also check plugs after letting the car idle
for a bit. An oversupply of fuel should show up as excessive carbon.
If this proves unsuccessful you should apply vacuum to the vacuum advance
in case the diaphragm is perforated.
There is also a possibility that you have a pollution device problem which
is causing an excessive leaning condition but I can't help you there as I
don't have any working stuff on my engine to guide my experience.
John
>Hello all,
>
>Finally got myself a dwell meter and tach combo and decided to do some
>adjusting to attempt to fix my lumpy idle. Well, after all of the following...
>
>carbs recently rebuilt by Jim Taylor
>carbs equalized and adjusted
>fuel pump- ok
>new fuel filter
>new points
>new condenser
>new rotor
>new dist cap
>new plugs
>new coil
>plug wires seem ok
>checked the dwell per spec- ok
>checked the timing per spec- ok
>
>...the idle is still lumpy. It just will not stay in one place. The idle
>probably fluctuates in a range of 150 RPMs. At higher RPM, there is a faint
>miss that is not really rythmic, but more intermittent. At idle, the car
>runs very rough with the miss being much more pronounced (but still
>intermittent). At this point, any and all suggestions would be appreciated.
>Thanks in advance :)
>
>
>
>
>Regards,
>
>Alan Lott
>
>1971 MGB
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