It may take several cold to warm cycles for the sensors to calibrate, as my 92 3.1 liter Beretta does.

Bill wrote:
>
> I changed the battery in my highly maintained 94 Lumina 3.1 after I
> noticed that it was cranking slow on cold days. It had been running perfect
> with a rock solid 800 rpm idle.
> I had to remove the air box and connector to the airbox hose to get the
> battery out. Now that I have this simple task done, I start it up and the idle
> bounces from 500- 1000 rpm over and over again. I figure the ecm needs to
> relearn things so I drive it 5 miles. No luck. The idle is steady at one stop
> and eratic to the point of stalling at the next. I checked all vacuum lines.
> Nothing out of place. I remove the airbox hose to check for cracks. It looks
> good. By this time it is dark and I haven't looked at it further. Today I will
> paper clip the aldl and look for set codes and reset the ECM. Does anyone have
> any ideas on what is going on here? I keep thinking IAC valve but that is just
> a wild guess and what does that have to do with changing the battery? I will
> also add that I cleaned and lightly greased the connectors. I don't get a check
> engine light. Thanks for any input.

--
Mike Walsh
West Palm Beach, Florida, U.S.A.