Samurai Idle Issues

[schmors]

I have an '86 Samurai that I got about a month ago. I cannot get it to idle right. When it starts up it idles really high, around 3k and then after a bit, goes down to maybe 1.5-2k and when its warm it dropps and putts and almost dies or dies. When driving along or touching the gas it runs great.

I just put a new (used) intake manifold into it cause I broke the old one over-tightening the PCV valve. It still runs almost the same. So I have the new intake manifold in and it seems all good except it is missing one place to plug a vacuum line into. It just doesn't have it, might be an older manifold or something without it. Its the line that comes from the middle of the canister to the manifold below the carb. Should I cap the line or leave it open or ??

It's the middle one in the picture:

[john1974]

If I remember correctly I plugged mine. I think it does help with the idle issue, but I cant remember for sure as its been a long time. I know I have mine plugged as I no longer have a canistor. If it doesnt help I would then check vac lines for leak, EGR valve, fuel filter. If none of that helps it could be the carb and a good cleaning with sea-foam, or trying the following trick might help once you know its the carb

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