[DeTomaso] DICK RUZZIN / Mangusta Idle

[Barry Seib]

Couldn't hurt to check the centrifugal advance mechanism in the distributor
to make sure nothing is sticking or broken. If the timing doesn't return to
the retarded position smoothly and consistently, the idle will be unsteady.
Barry
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Even after all of the following corrections I still have idle problems, even
after adjusting the idle setting up from 300 rpm to 800 rpm it will drop
back to 300 after driving the car.

This is what I have found and corrected so far:
1) One cracked spark-plug insulator
2) One loose spark-plug
3) Improper Timing, it was slightly off
4) Fuel pump filter plugged, all three filters are now clean
5) Secondary shaft spring on Holley not wound tight enough, idle slow to
drop to set speed
6) Left side idle jet cork seal loose

The car now runs smoothly in 5th at 35 mph.  This is my bogey

I have installed a new coil and  resistor and removed my electronic ignition
and re-installed the points. No change to any of these actions.

After a lot of reading about vacuum leaks I have discovered that by sitting
at idle if I pump the brake pedal about 10 times in a row the idle goes up
from 800 to 1100. I just did this twice.

Is there some kind of check valve in the power brake system?  My next step
is to disconnect the brake vacuum hose, plug the outlet and see what
happens.
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All the best, Dick Ruzzin.
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dickruzzinDESIGN at aol.com  /  Phone: +313-824-0539  /  Cell: 313-300-9558