almost stalls at startup

Not sure if anyone has come across this before, but on cold startups the engine cranks over rpm goes to 1200 or so then it drops almost to a stall, then picks up to normal idle again. Its a 95 Na manual always started in neutral. Have noticed it doing this for about 6 weeks or so.
Any suggestions? Or just ignore it?

 

Check your PTU connectors. Failing that, check your TPS maybe?

 

Vac leak or issue with the IACV/AAC is my guess.

 

I change my answer to this, the bugger is usually right.

 

I would hedge that this would be along the correct answer, I had the exact same symptoms when I had a few vac leaks, they affect the Air/Fuel Ratio as-well, so that's a bit of a loss in power to go with it, if you don't have access to a leak tester, cigar smoke blown into an inlet on the plenum can help you located them, or if you can't do that, try some soapy water.

 

Thanks for the help ill get right into learning more about vac leaks!