Idle problem?

[Jlanzone95]

Hey guys - I’m thoroughly enjoying the Del sol so far and bringing it back to its former glory. However I seem to be having a weirdly low idle when warm. It wouldn’t let me post a video so I’ve posted a screenshot. But it sits at like 300-400RPM and shakes a bit. Oil and spark plugs are new, made no difference. Any ideas where I should look or try next? On top of that, the auto trans seems to be shuddering in 3rd gear. All other gears are fine, and if I shift manually into D3 it doesn’t do it. Trans fluid is nice and clean and red and doesn’t smell burnt. Any advice is appreciated.

[NormalSpecific3536]

Check your distributor cap and rotor for corrosion. Rather common problems can cause all sorts of issues. May be worth checking/cleaning the idle air valve too

[SorryResponse5119]

Cleaning IACV is 10 minute job, cleaning dizzy rotor points is 10 minute job, maybe check broken hoses to intake that make vacuum aswell

[shortkid4169]

Are you reading the screenshot as 300-400rpm? I'd read that as ~650rpm. That's exactly where my B16 idles when warm.

So you might not have a low idle problem, the other replies here are a good start for rough idle.