Yes, but only if there is a brake booster failure. That will create a leak for sure.
Use the propane method to find the leak.
The PCV must be hooked up right, the car should be pulling good vaccum. The set up requirements need to be followed.
Fords Ellery Service manuals go through how to tune a 1-bbl carb XD cross flow.
Electronic ignition, EGR and throttle positioner solenoid must be engegised the right way.
If your not doing it the factory way, your doing it wrong.
Check that the flexplate isn't bodgy, and that if it has a viscous fan, its in balance.
1-bbl x-flow 250 Transits and Falcons always had a lousy idle.
If vac isn't right, then you have to find out where the leak is and why.
A one jet supply to both legs of the early 1-bbl intake manifold won't be even, and thats a perenial problem that won't be fixed without a proper 2bbl carb. Propane leak test might help, but its limited as to what you can do to fix it.
There is no four or two corner idle in a Bendix Stromberg 1-bbl carb.
Propane method is this.
http://vb.foureyedpride.com/showthread. ... ost1663147
JACook":e3oja45a said:
The propane enrichment can be done without any special tools, but I will say the tool makes things
a little easier. All you need is a way to repeatably supply a low flow of propane. When I first started
using the propane enrichment method, I modified a regular propane torch by removing the torch bit,
and attaching a hose.
I have altered the factory method just a bit though. Rather than inject the propane into the air cleaner,
I prefer to aim the hose down each individual throat, to make sure I'm getting the same reaction from
all of them. Then I work with progressively lower propane flow rates to fine tune the mixture setting,
while watching both engine RPM and manifold vacuum.
It takes a bit of practice to find the balance, but once you know what feels right, it's much quicker and
more accurate than just using the vacuum gauge.