Take the aircleaners off and use your hand to block off the air flow to
the carb(s). If the speed of the motor increases as you reduce the air
flow you've got a leak. start pinching hoses and blocking the carb
again to narrow down the location of the leak.
>
> On Fri, 11 Jul 1997 karim.marouf@cancom.com wrote:
>
> > I've been trying to rebuild my HS4 carbs. When I put them back on the car
> > last night and tried starting it, the motor immediately reved to 4000 rpm. I
> > had the throttle stops backed all the way off, so I suspect that I've got a
> > big vacuum leak somewhere.
> >
> > On one of the carbs, the jet does not easily slide back up after the choke
> > is released because the spring mechanism is messed up. However, I've pushed
> > it back up manually and I don't think that this is related to the problem.
> >
> > Am I correct in looking for a vacuum leak, or could there be some other
> > problem that's causing this? Are the gaskets between the carb and
> > manifold/spacers the most likely source of the leak? Could the throttle
> > shafts be the problem?
> >
> > Any suggestions would be appreciated!
> >
> > Karim
> >
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