I've searched for this and still haven't found a potential answer to my issue.

I got my vac lines connected last night and did a quick test. I'm currently idling at start up around 2k. I haven't allowed it to warm up since I have a coolant leak, and I didn't refill.

I have new SS vacuum lines from Rodney installed. I had a vacuum leak and couldn't find it right away, so I ordered the new lines and had everything apart. Figured if I just replaced everything, I could find the leak, as well as inspect the rubber fittings. I found a couple worn fittings, as well as a line that was cracked. I replaced everything, got it back together, and still have a high leak.

I had replaced my EGR tube last year with a new, flexible one from Rodney as well.

I haven't checked my IAC yet, so that may be a issue, as well as the EGR itself, but I didn't have a high idle until I replaced my valve cover gaskets. That's why I originally thought I had an issue with my vacuum lines, maybe forgetting to re-connect one after putting everything back together.

Any thoughts?

Isn't thatt normal, on start up when cold or not been driven yet mine is at 2k then in a few seconds it's drops to 1000

I have 2 four cylinder motors that do almost the same thing. When I start the cars they will idle at 2K or higher. Then they will increase idle to 2.5K then start to drop. After about 1 min the idle will drop to 1200 then down to about 800. If I don't let the engine warm up the idle will never drop. And when I say warm up I am not talking about heat. It doesn't make any difference what the engine temp is.

I have tried ever part I can think of and the problem hasn't changed. And like I said this is on two different cars.

Hmm, alright, maybe I have the issue fixed then. If I recall, before I changed the lines, it was idling around 2400, so if idling at 2k at startup, I'll let it warm up a bit and see how it turns out. Thanks for the responses.

Yes. High idle at start up when cold and then it will ramp down. IAC will toss a code. So probably not an issue here. EGR will not, but that will cause a different symptom.

Edit to ask: Year and engine will be relevant here....

[This message has been edited by Jason88Notchie (edited 05-08-2014).]

Thanks.

Yes, I suppose it would. It's a 1987 2.8L V6.

Check or replace your PCV valve if you haven't already.