Question 2, High Idle - yet again Options

[BenNC]

I know, there have been a gazillion posts about high idle. Most of them seem to end with check al the hoses and set the timing.

I have replaced all the hoses, and set the timing. With the idle adjust screw all the way clockwise I idle at about 1800 rpm. Per my Haynes manual, turning the screw counterclockwise whould lower the speed, butthe idle increases for me. Is this an error in the book, and what should I look at next.

By the way. It idled fine until the points of undetermined age froze on me. It idled fast with new points and has continued with the new Pertronix.

Thanks

[Bleyseng]

Likely leaks?
injector seals
throttle body to plenum seal
MPS hose
PVC hose if you still have the weird rubber y fitting that the the decel and PVC hose go to.
PVC rubber elbow at the oil filler
the plenum-it will split or crack
Throttle body at the throttle shaft- steel on aluminun slowly wears until its sloppy and leaks. Can be bushed with a brass bushing and makes for smooth throttle petal
The big plenum to manifolds hoses
Manifold to head gaskets
Check each area with a small shot of starting fluid, [B][/B]small shot[B], otherwise you will flood the engine compartment with starting fluid and the engine will rev up because of that not what you are testing.
If there is a leak say at the #3 injector seal, when you spray it the engine rpms will go up at few hundred. AH HA! a leak!

Thats how you can track this down.

One other thing, unstable idle is a problem with a wornout distributor. Pull the dizzy and check to see if there is ANY side to side slop of the shaft. If there is, get a rebuild one as you will chase idle problems forever.

Geoff