Hi Matt and all who have made helpful suggestions,
Thanks.
Right now there is too much snow and more tomorrow and then more on
Saturday. Maggie is up on stands while the rostyle wheels are at the
sandblast shop, so kind of hard to do diagnostics.
>I'm no expert tuner, but all these things sound like a vacuum leak. If you
>haven't found it by spraying stuff on the carbs, then I'd try:
>
>1) Whatever you're spraying to find the leak, squirt a tiny bit right into a
>carb throat so you know it'll really make a reaction.
>2) Spray *both* ends of the throttle shafts on both carbs.
>3) You may have a leak at the carb/heatshield/spacer connection, or the
>spacer/manifold connection. Altogether there are six gaskets aren't there?
All intake gaskets were replaced when engine was rebuilt. I ran out of dough
before the carbs got done.
>4) Check for a leak where the intake manifold meets the head.
>5) Check for leaks in plugged vacuum takeoffs.
>6) Check for leaks in whatever's connected to a vacuum takeoff - like the
>vacuum advance, a brake booster hose, etc.
I will have to take a look again. I had thought about a leak in the vacuum
advance diaphragm etc. Was going to replace the advance unit until I found
out how expensive the HIF advance units are. Tried to check operation as
much as I could didn't appear to leak but who knows? Might be another reason
to
*regress* to HS4s
>As to rebuilding vs. replacing, SU vs. Weber, and HIF4 vs. HS4 I can't help
>you, but there are lots of us here who will debate it for weeks and
>eventually give you tons if information, a bit of conjecture and some
>downright bigoted opinions eventually offering no concrete solutions.
>Welcome to the list.
This would not deserve the distinction of being a list of British car
fanatics if there wasn't an argument on the carb subject. I was just afraid
that the subject had been recently thrashed over so completely that a
collective groan would arise at my bringing it up again.
>Oh, and if it turns out not to be the carbs? I'd just sell the car to Paul
>Tegler and get a new one.
>
>Matt Kulka
>Huntersville, NC
>'74 B - with two drafty SU's. (Every time I get ready to rebuild them,
>something else comes up.)
>
>P.S. I have a dream to change my pumpkin, er, "Harvest Gold" '74 B to a
>nice creamy white. But I'm a long way from that. Got any pictures of it
>online?
No pics on line yet, I have a couple of the MGB along side my 1991 Mercury
Capri roadster (Matilda). The Brit and the Aussie side by side drives both
proud countrymen batty. I am happier and happier about the white paint every
time I see my neighbor's citron green Plymouth Neon! The 1974 big black
rubber bumper blocks are safely tucked away. Couldn't bear to part with em
but couldn't bear to look at em either. The chrome over riders from my 73
parts car sure look nicer.
Eric
"Maggie" 1974 MGB Glacier White and Chrome bumber converted.
"Matilda" 1991 Merc Capri non turbo and Winter white.
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