MG distributors used two methods of ignition (timing)
control. One is manifold vacuum controlled - off the intake
manifold, the other is 'ported' - the take off is just
outside the throttle butterfly. Mix up the two and your car
won't run right.
My other thought (two for the price of one!) is fuel supply.
How well is the pump pumping? How well are any filters
flowing?
Eric Russell
Mebane, NC
> Subject: [Mgs] anemic running B
> To: "MG LIST" <mgs@autox.team.net>
> o.k. folks, I need some help in diagnosing a problem on my
> MGB (engine is a 1969) , bottom line is the car is running
> anemic, here is what I did: changed from HIF4 to HS4
> carburetors, originally I was running with the standard
> needle I then changed needles to the richer mixture, it
> didn't seem to make any difference, I have K&N filters on
> the carburetors. The car is running as if I were heading
> into a head wind, it appears that I have very little get
> up and go in first and second gear, third gear gives me a
> little more giddy up and go, on a flat surface the car
> runs great but as soon as I start going up an incline the
> car looses speed and runs anemic, no matter how much I
> depress the accelerator. I'm thinking valves? need a
> compression check? going back to the HIF4's? by the way
> timing is set pretty much dead on, if anything it may be
> just a wee bit advanced.
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