[A26B]

Originally Posted by Vettetech1

.........The only worry spot I just thought about is the elbow that connects the two Pcv valves to the vacuum tube. Come to think about it they seemed pretty sloppy, it's got hose clamps on the bottom side. Any way to seal the top better without buying a new elbow. That could be part of the off idle stumble/hesitation. .............

I have new top connectors for the PCV valves in stock.

http://jerrysgaskets.com/store2/root...products_id=76

Fixing vacuum leaks is good, but I don't think this is your problem.

I have seen weak spark several times, as the cause of an intermittent miss. In all of those instances, a coil was at fault.

Use an extra plug and check spark to ground on each cylinder with the engine running at idle. Spark should be bright blue & jump 1/2"~3/4". If you have an orange spark, replace the coil.

I would also recommend replacing the plug wires at the same time and use dielectric white silicone grease on the coil terminals and in the boots on each end of the plug wires.

http://jerrysgaskets.com/store2/root...roducts_id=547

Considering you had a nest under the plenum, clean each electrical connector, lube the contacts with the silicone grease and also the connector seals.