I just read the whole 35 pages of posts. I'm posting here to keep a log for myself and also for everyone's info.
I picked up FR-S in the beginning of June. Idling has been perfectly stable. Even at the moment when the A/C compressor turns on, it would drop from 650 to 630 or so, where the needle hardly moves.
In early October when I just passed 4k miles, idle dip happened for the first time. A/C was on. About 2 seconds after the A/C compressor turns on, it would drop to 500 and then jump up to 800. It kept doing this every time the AC compressor turned on, which is about every 15 seconds.
No idle dip since then for about a month. Then it did it again.
No idle dip for about 2 weeks. Then it did it again...
No idle dip for about a week. Then multiple times a week...
I currently have about 6k miles. It has MT and VIN ends with 3xxx. By reading people's experiences, I'm guessing the dealer won't do anything for mine since there is no CEL. But if it keeps doing this, I'm going to mention this when I get my first service done next month.
Quote:
Originally Posted by Asphaltfrs1
Quote:
Originally Posted by Lytheum
confirmed the idle drop today in my brz for the first time. i was at a taco bell drive thru
and noticed the rpms drop to about 400 then bounce up to 900...it then did it again but dropped to about 500 and jumped up a few then leveled
out. the a/c was running with the fan on the lowest setting.
ill mention it at my first oil change or take it in if it keeps happening
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That's the setting I have on the A/C when it occurs, I turn the A/C off and it idles normal again. |
My experience is similar to Lytheum's and Asphaltfrs1's.
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Originally Posted by enigmaaron
Only 225 miles on mine so far but I thought I would point out that my idle is consistent at 650rpm. Seems like
everyone reporting this issue is idling at 800 then drops to 400, correct me if I'm wrong? Maybe a clue as to what's going on?
If I turn the AC on it will dip to 500 for a moment, bounce up to 750-800, then come right back down to 650 all in a matter of 1-2 seconds.
Also, no crickets here yet (fingers crossed) in case anyone is tracking a correlation.
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enigmaaron's one seems similar to mine as well.
Quote:
Originally Posted by civicdrivr
I've been keeping an eye on my car, and now it only does it with the a/c on or when the rad fans kick on. If
everything is off the idle is rock steady. Im just shy of 5k miles.
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Mine stops happening when I turn off the A/C just like civicdrivr's.
Quote:
Originally Posted by Rob_g
I was parked on the side of the road yesterday with my FR-S (AT) running and the A/C was on (too hot to have it off). I
was eating some popcorn and just relaxing for the moment. I must have been parked about 5 minutes and then all of a sudden the engine
sputtered, idle dipped to about 350, the car shook and it felt like it almost stalled. The engine did recover right away, but after that the
idling started going up to about 800-900rpm.
Rob
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Mine is a little bit different from Rob's since mine would be doing it every 15 seconds. It's not something like it does it once and not for a while. When it does it, it does it every 15 seconds until I turn the engine off and turn it back on.
Quote:
Originally Posted by bneale
I'm sitting in my car right now. I was able to get my RPM's to drop by turning the AC on while the fan was already
running. It dropped from about 800 down to 400 and back up again after a small shudder. I was able to get the car to do this 3 times in a row
just by pressing the button.
I have no cel yet and no whine. Car was warm because I was just driving it.
Bneale
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When my car has idle dip, I can do what bneale describes too. But "when" it happens seems to be random and I don't see any pattern. Once it happens, it keeps doing it until I turn off the engine.
Updates for the record:
1/4/13 - idle dip after 3 weeks. Gone after restarting the engine.