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04-01-2015, 08:07 PM | #1 |
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SOLVED: Idle Dip only when coming to a stop?
Hey guys having this weird issue for the past month now. Past 2 mechanics can't figure it out. As I'm coming to a stop my car shakes a bit and rev vips about 100-250 rpms then goes back to normal after coming to a complete stop. This happens during start up and goes away after 15/20 minutes of driving. I just redid my spark plugs/coil packs and have 41k miles. It almost feels like a vacuum leak of some sort. Anyone have any idea on what I should look for?
Edit 04/16/2015: So I took the Intake Hoses out and saw the throttle body had a shit ton of gunk in it. Outside of butterfly spacer and inside.. Seems like the gunk was literally at the rim of the butterfly and may have been the culprit. I sprayed MAF cleaner and wiped it clean and let it dry off for an hour. She is purring like a god damn kitten now baby! I'm glad I managed to fix this myself without throwing more money at a mechanic / dealer. I just hope the problem doesn't come back. Will keep you all posted in a hundred miles! BTW Warning: Please be FRIGGEN CAREFUL when cleaning your TB. Last edited by spatcha88; 04-16-2015 at 09:12 PM. Reason: solved |
04-01-2015, 08:33 PM | #2 |
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Do you have an aftermarket air intake by chance?
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04-01-2015, 09:36 PM | #3 |
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Negative on the intake. Still stock. Only bolt on so far is my exhaust. But this issue has been happening long before I got the exhaust installed (2 weeks ago.) Since I first purchased the car it's been doing it. At first I assumed it was just cold start. But it never went away :|
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04-01-2015, 09:40 PM | #4 |
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ECU calibration on some of the 2013's did this. I had the dealer flash the latest version and it went away.
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04-01-2015, 09:43 PM | #5 |
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This...take it to the dealer and ask them to check for the rough idle service bulletin.....that should fix it.
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04-01-2015, 10:11 PM | #6 |
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My 2013 has done this from day one buy never drops below 500 RPM and never makes the car shake, so never did anything about it.
I notice that it is more likely to occur with sudden stops. Less likely with gradual stops. |
04-02-2015, 09:17 AM | #7 |
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I had this problem, dealer reflash fixed it.
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04-02-2015, 09:52 AM | #8 |
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Mine also did this, and my dealer said it was due to my AC compressor kicking in/out. I was not impressed with this response as the car should not "almost stall" in idle, regardless of the compressor coming on. I did notice that with the AC turned off, it was not as bad.
Issue has gotten better in time. |
04-05-2015, 07:01 PM | #9 |
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Mine does it even after a tune. Like Kfresh23 said it's not as bad with the a/c off.
Last edited by brianhj; 04-06-2015 at 12:56 AM. |
04-06-2015, 02:12 PM | #10 |
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04-06-2015, 02:30 PM | #11 |
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A small "dip" is common in any car when the A/C compressor kicks on..
However the hard dip when the car shakes was fixed in a service bulletin as stated. Or you can buy an OFT and flash a tune. Its not going to hurt the car, just a minor annoyance. |
04-06-2015, 07:33 PM | #13 |
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What the fuck is the point of the a/c compressor cycling on and off literally every 5 seconds? Is there a good reason for it?
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04-06-2015, 08:13 PM | #14 |
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Keeps it cool when you aren't moving.
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