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-   -   Auto LT1 idle speed?? (https://www.corvetteforum.com/forums/c4-tech-performance/3802976-auto-lt1-idle-speed.html)

larry_c4 04-01-2016 08:10 PM
Auto LT1 idle speed??
 
In traffic, my '92 idles around 500-550 RPM fully warmed up. Is this normal for a Auto?

aklim 04-01-2016 08:14 PM
What is the ECM commanding the idle speed to be? What is the RPM as seem by the ECM and NOT the tach?

antfarmer2 04-01-2016 08:16 PM
My 94 is about 800 but tachs lie get a cheap laser tach of ebay and see for sure.

larry_c4 04-01-2016 08:17 PM
Originally Posted by aklim (Post 1591908140)
What is the ECM commanding the idle speed to be? What is the RPM as seem by the ECM and NOT the tach?
How do I figure that out?

aklim 04-01-2016 08:19 PM
Originally Posted by larry_c4 (Post 1591908161)
How do I figure that out?
Beg, borrow or steal a scanner? The scanner will tell you want the desired or command idle speed is. Also, it will tell you what the ECM sees the engine is doing. The tach can be inaccurate.

STL94LT1 04-01-2016 09:28 PM
550 rpms in gear is correct.

larry_c4 04-05-2016 09:48 AM
Originally Posted by STL94LT1 (Post 1591908592)
550 rpms in gear is correct.
Okay :thumbs: just seems a little low to me.


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