If it is original, that sounds like the SU fuel pump. The original one
would be back there in that area. My car did not have that. When I
replaced it, I just put on another aftermarket cheap fuel pump in the
same place.
Andrew
Desmond Mullen wrote:
> Hello,
>
> I went out to the grocery store this evening and filled up my '78 MGB
> on the way. I recently did a basic tune-up and cleaned and tweaked the
> carb, so I was curious to see what mileage I was getting.
>
> It turned out I was getting 10 miles per gallon - about half what I
> got before the tune-up! I thought and thought and figured there must
> be a leak somewhere, the car is running nicely and that difference in
> mileage couldn't be explained by something being out of adjustment.
>
> Sure enough, when I got home, I looked and saw a drip coming from the
> line about a foot or so forward of where the fuel line comes out of
> the tank (on its way to the carb).
>
> It's nighttime and I didn't have a good flashlight so I couldn't
> really see very well, but there's some device there that - for a
> moment - looked like a big in-line fuel filter. I'm sure it's not, but
> I don't know what it is. I'll certainly investigate in the light of
> day tomorrow, but does anyone have any ideas? It appears that the fuel
> is leaking from this thing or from a connection to this thing. I
> couldn't find anything like it in any catalog or reference book I have.
>
> Auxiliary fuel pump? Giant fuel filter? ??
>
> Thanks!
>
> -Desmond
> '78 MGB (still fairly new to me)
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