Very low idle issue after disconnected battery
08-27-15, 08:57 AM
#17
Agreed. Replacing the battery and performing a soft reset should not cause a low idle condition. If anything, the opposite could be the case. A higher then normal idle is present and settles down within a short period of time. If your electrical system checks out fine, consider cleaning the throttle body. Not sure on the 460 but my 430 had a port that if clogged with carbon would affect the idle.
These newer drive by wire cars have eliminated that valve and it is now exclusively driven by the drive by wire system. Because of this there is virtually no carbon deposits that can effect idle.
08-27-15, 07:22 PM
#18
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Update: I don't work far from home so it took a couple of days to actually get any mileage and didn't want to drive around because the low idle was really getting annoying. I'll be happy to say that when I pulled into work today, my baby purred like before. Right at around 650-700. No low idle and no ac blowing warm. Only difference I've seen is the throttle is a bit snappier. I'm guess it's still "learning" my driving habits as I've read before. Yes, I'm the guy that doesn't let the RPM get over 2k between gears. LOL. I'd reset the trip meter to see just how many miles it would take and upon arriving, I was at 40.7 miles. Problem fixed. Thanks to everyone that helped and I'm a believer of the LS learning process.
Last edited by 305Busa; 08-28-15 at 04:51 AM.
10-27-22, 07:07 AM
#19
Same issue
Hello fellow CLers. Before you ask, I did a search in the forum and couldnt find anything that was like mines. Some similar but nothing the same. Long story short, my car battery was bad and took it to get it exchanged for a new one. Car was without the battery for probably around 6 hours. Came home and installed the new battery and car fired right up but I noticed that it idles at around 400-450rpm. This is with the ac on or off. AC does not increase the RPM any. But I also noticed that at this RPM, the AC doesnt blow any cold air. As soon as I barely press the throttle and it gets to where it used to idle prior (600-700) the AC blows cold again. The car has never idled this low prior. Anyone know a DIY that will solve this issue? I took the battery out for around 2 minutes and still the same thing. Ive also read about leaving it disconnected for 30-60 min and see if it works. But before I try that and its a fail, Im wondering if anyone has experienced this and what your solution was. Thanks.
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