high cold start Idle

[buck531]

So I did a search and found a few threads on high cold start idles. Not much really came out of the threads and they died. Maybe I'm missing something.

I just took a few videos of both my junk cars. First one is my 99. Top swapped, xp cam, Pre-00 N* TB and that's about it. It idles right around 1100-1200 where it should be from what I've read and such. This car hasn't been started in at least 3 days.

https://youtu.be/9hlGbX1NdaU

Now my 03 is below. I/C. 00+ N*, stock cam, blah blah . It started doing this months ago but after it warms up it's perfectly fine and idles ok. I did take out the IAC last night and cleaned it. It wasn't bad. Both tunes on the car haven't had any cold start idle things changed in the tune. I checked both of them last night. Everything else is fine when it warms up.

https://youtu.be/7JaUj7fpeoU

Why is my 03 idling higher when it's cold?

[Scottydoggs]

theres settings in the pcm for cold start rpm's, temp vs rpm iirc. colder it is higher the idle speed.

[Scottydoggs]

looks normal to me.

[buck531]

Yes Scotty I know that. I already checked that. They are the stock values on both tunes/bin files.

Both cars are at the same ambient temp. I took the videos within minutes of each other yesterday.

But going back to my original post. Why does the 03 idle higher than the 99 at a dead cold start?

Edit - Also, I particularly don't like waiting 10 minutes before I want to put the car in reverse to go to work. Cars don't like it when you go from park to reverse when the car is idling 1300 rpm's.

[Scottydoggs]

tach is wrong then? use a scanner to show the rpms, not the cluster.

[buck531]

it's 1400 on my scan master....The tach is not wrong. It's idling high. After it warms up. It's fine.

[Scottydoggs]

vac leak maybe.

[buck531]

Nope. somehow i'm a tard (shocker eh?). I thought I had them side by side but I didn't.

my 99 bin file has a slightly lower idle table than my 03. The 03 has air pump on and air pump off. Any idea what that is? - Edit - Cali emissions crap...

[Scottydoggs]

i seen that, but didnt take a screen shot of it. how many bins do i have? lol

[buck531]

well I ended up dropping the idle on the 03 down a few hundred RPMS's. Seems to have helped but the car has only been off for 4 or so hours. The test will be in the morning.