Redog

In terms of fuel I know this:

Fuel tank has a vent into the canister, which a another tube runs out towards the carb, but going into a purge valve, then into a temp controlled vacuum switch on the manifold and then into the carb.

I do not have this purge valve on my car. It was broken, cracked open so I tossed it. All I have is from the canister to the temp cotrolled vacuum in the manifold (still has the line from the gas tank to the canister)

Car runs rough.

Can I just run the hose right to the carb and remove the temp vacuum switch? I put a cap on the carb where the pruge system is supposed to go in and the car ran a lot worse, so I pulled the cap off.

Just trying to get idle back to nice and smooth, and get rid of that horrible lag in accleration

nsnarsk65cutlass

If you are talking about the purge valve on the '85 i replaced those in the day.It's been a long time, but i think the engine went rich when the diaphram failed.

joe_padavano

Then put it back to stock. The purge system is designed to only purge the canister under certain conditions. Otherwise, you are introducing a vaccum leak through the canister, thus the rough running.

Redog

I no longer have the purge valve.

Going to the junkyard next week, I'll see if they have one there

OLD SKL 69

x2

Can get a new one reasonably prced through Rock Auto. For the money, probably better than rolling the dice on a used one and finding out if it still works.

Redog

OK will do.

Old one was broken anyway