I had the same problem with my '70 B. Turned out to be a partially
blocked fuel line going into the float chamber of one of my carbs. (Old
gasket was scrunched over blocking the flow.)
Found it by wrapping the engine up to where it would go no more
(3000-3500) using the throttle cable by hand and then spraying a bit of
ether into the front carb. It had no effect. Then I did it on the back
cab (just a little spray mind you.) and the engine roared on up past 3500.
I then tore the back carb apart and found the problem. Took 2 or 3
months to find; and an hour or so to fix. (The car is not a daily
driver...)
Also check for a lack of air.
On Mon, 23 Nov 1998 10:18:22 -0800, Chris Attias wrote:
>Listers (Knobbly and otherwise),
>
>I'm having a problem I haven't been able to solve yet, and could use as
>little advice. My '64 18G engine seems to "miss" or run out of breath
>(I'm not sure yet which is the better description) at 3500 RPM or so. It
>runs fine up to that point.
>
>Facts in the case:
>
>*New coil.
>*New fuel pump with regulator set to 2 psi.
>*New plugs.
>*Old points, condenser, rotor and cap; dwell 62 degrees; dynamic timing 14
>deg BTDC@ idle.
>*Vacuum advance works.
>*Distributor: 25D "40778" (not sure what application this came
>from--anybody with a period Lucas catalog out there?)
>*Older, rebuilt stock carbs
>*PCV valve seems OK.
>
>Any ideas on what to check next?
>
>Chris Attias
>'64 MGB
>
>
>
--
Andrew Lundgren
lundgren@iname.com
--
Andrew Lundgren
lundgren@iname.com
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