Question about idle speed

I have a 1996 S10 w/ 2.2 4cyl. manual trans. I have just installed a tach and need to know the idle speed for this engine. The tach is giving me a very high reading, from 1500 to 1000 depending on which setting I have it on. (2 cyl, 4cyl, 6cyl, 8cyl) I have installed an adapter because it is the DIS ignition system. I have looked everywhere and I can't find the idle speed anywhere online.:banghead: If anyone could help me out it would be appreciated.

My 99' LS reads about 700 RPM. It was lower when I didn't have a Cold Air Intake kit installed.

I think it should be around 700-750rpms.

Thanks. I will check into it.

My '96 2.2 manual trans idles at about 900-950.

My '96 2.2 manual trans idles at about 900-950.

That's pretty hi bro.

That's what the factory, in-dash "tachometer" shows. Data scans show about 740-745 RPM at temperature. That thing the factory put next to the speedometere is more a part of a trim package than an instrument. It almost kind of moves around relative to engine speed - Almost.

That aside, it does start at about 1150 (actual, not indicated) until the CTS reads over 104°F, where it begins to drop slowly.

You are right. Not overly accurate.

750rpms sounds perfect.

On my sonoma its at 900 Constant around 1100 when cold.

On my sonoma its at 900 Constant around 1100 when cold.

4 banger?

Yea 2.2

I still think that is a little high, but ytou might have the same thing as Blue Bowtie has that it is 750rpms, but showing 900 on the tach.