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30F2 Ignition Glow Code with Cobb
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04-03-2011, 01:29 PM | #23 |
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Hey Everyone,
I have been talking back and forth with Alan a bit. Still trying to get a feel for what's going on. After looking at the data here, I'm guessing the DTC is not due to detonation around the stumble given it would say it hit at 4k RPMs. Alan, I think you are safe there. If the boost gets a little too out of range the ECU will be more aggressive with the throttle closures to the point you can feel a stumble. If you don't mind, go back to the 93 octane maps and get a log or two of the events for me. Lance and I will take a look. When it come to the hot air intakes, personally, I'm never a fan. Hot air entering the motor can lower the detonation threshold on top of lower air density. Cheers, Rob |
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04-03-2011, 11:57 PM | #24 |
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Rob,
Is there something that occurs at around 4k rpm? I remember reading about something occurring at that point even on stock cars. When the code was triggered I definitely felt the car stutter and cut power for a second and then pull again. I don't mind running the 93 map again but I also want to find out why I got this glow code. I don't want to risk damaging my motor while doing more testing. Is it common in your opinion to see throttle closures during WOT? All of my logs show closures before 4300rpm and none after that. I remember you saying that the Cobb shop car logs looked similar to mine. How would you explain why some cars don't have any TC? Alan
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04-04-2011, 12:02 AM | #25 | |
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There is a big concern of warranty issues and if people are going to be using Cobb, they are expecting no codes when bringing their car into dealerships. The comments above would show a false security with typical Cobb users that could put them in a sticky situation. |
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04-04-2011, 12:11 AM | #26 | |
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Last edited by OneThreeFive; 04-04-2011 at 08:26 AM.. Reason: English Fail |
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04-04-2011, 01:21 AM | #27 |
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04-04-2011, 08:48 AM | #28 | |
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04-04-2011, 09:21 AM | #29 |
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As a data point i am running the cobb s1 tune with a ets fmic for the past 1500 miles with no codes. I just checked with a bt and there was nothing. As for codes when going to the dealer i believe the AP deletes everything when uninstalled. It is recommended that the tune be uninstalled before a dealer visit as standard practice.
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04-04-2011, 09:26 AM | #30 | |
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04-04-2011, 09:32 AM | #31 | |
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04-04-2011, 10:11 AM | #32 |
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@OP did you check to see if your ignition coil on cylinder 6 is going bad ? It could be out of coincidence it went bad at the same time when adding the AP...?
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04-04-2011, 10:16 AM | #33 | |
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The only thing that comes up to my mind is VANOS change-over event...
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04-04-2011, 10:22 AM | #34 |
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Can the Cobb be updated to read these shadow fault codes? I sold my BT tool because I thought the Cobb could read all codes...it isn't a huge concern for me since I am no longer under warranty anyway, but it sure would be nice.
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04-04-2011, 12:23 PM | #35 | |
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04-04-2011, 12:26 PM | #36 |
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Yea, there is a difference between seeing the codes and clearing the codes. Ideally, we want to the cobb to be updated to both see and clear, but it would put a lot of folks at ease if we knew they were at least clearing codes inline with the bt tool.
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04-04-2011, 12:38 PM | #37 | |
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Cheers, Rob |
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04-04-2011, 12:43 PM | #38 | |
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I very highly doubt there is serious detonation happening. Looking at the logs the throttle is closing a little bit too much. It's possible your car is just on the positive side of being very responsive, maybe just a little more than our shop car. We can certainly tone down the WGDC in that area if you want to get me some good logs. If you would like to stay on the safe side, we will be releasing much more intensive logging abilities in the next month. Cheers, Rob |
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04-04-2011, 12:49 PM | #40 |
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awesome news all around there rob
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04-04-2011, 12:51 PM | #41 |
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04-04-2011, 01:01 PM | #42 |
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Will the Cobb AP eventually read shadow codes like the glow ignition codes?
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04-04-2011, 01:28 PM | #43 |
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04-04-2011, 01:46 PM | #44 |
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I hope you're talking as an optional map because my WGDC runs higher than Alan's and I don't see any TC. I'm speculating that Alan's wastegate(s) are just a lot stiffer than the norm so there's a bit of overboosting until the ecu can do its thing.
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