The floats in the SUs -- are they original brass ones, or white plastic
replacements?
After I installed Grose-Jets, I found that the brass floats would vibrate at
the engine's resonant frequency (around 62mph) and "dribble" the balls in
the Grose-Jet like a basketball, causing the engine to sputter and surge.
Switching to the plastic, non-adjustable floats fixed the problem.
Switching back to regular needle valves would have worked, too, but the
reason I switched in the first place was I was having chronic problems with
debris.
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires
on 8/28/08 8:36 AM, Bernd at 1971mgb@cox.net wrote:
> alright folks, my 71 "B" is acting up on me, within the last month there have
> been three occasions where I'm driving along (say at about 60) suddenly I get
> a whiff of gasoline odor, then the car's RPM drops and the car starts surging.
> When I pull over to the side of the road the car idles at about 500 and tries
> to die out, I've checked the dampers in the cabs, the weird thing is when I
> press the dampers in the engines RPM speed up (should be revere se) I've
> checked the floats, I have Grosse jets and they are free, I've change to my
> good spare distributor on the side of the road, after doing all those things
> the car starts to run fine again, then a few days or a week later it does it
> again, I'm stumped, any help?. should I look toward the fuel pump?
> Bernie
> 71 MGB
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