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Old 12-01-2019, 02:37 PM   #1
Skim302
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Default Constant DAM drops

About two weeks ago, my DAM dropped to .875. I figured it was most likely bad gas so I ran my tank low and filled up again. I tried driving around for awhile to let it reset itself but I got impatient and just reflashed my tune. Everything was ok until I had about a 1/4 tank left and the DAM dropped again. I still kinda figured the gas I was getting was bad so I tried a different gas station this time, reflashed and tried again. Last night the same thing happened. I got to about a 1/4 tank and the DAM dropped.

I doubt the tank being a 1/4 has anything to do with it but I figured I would include it to provide all the information I have. My FBK and FKL after I reset both times were bouncing around -1.41 a lot even when the DAM was at 1 so Iím guessing the car still had something going on even while at 1.

Any suggestions would be great. I tried googling and everyone just seems to point toward bad gas but I donít see how thatís possible after two fill ups at two different gas stations. (I drive a 2017 WRX with a Torqued etune.)
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Old 12-02-2019, 02:06 PM   #2
noobultimatum
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First off, STOP unnecessarily resetting the ecu and reflashing the tune. The computer ends up having to "relearn" everything and makes the process of find out what is actually going wrong that much more time consuming for you.

1.41 tends to be a/c compressor kicking on... but your DAM is being effected so i do not think it would be the compressor.

Perhaps your LPFP or HPFP is having an issue with keeping fuel at the injectors when tank starts to run low? I've never heard of that happening, but if the DAM drops consistently at 1/4 tank, maybe the issue is related? Maybe the car runs slightly lean when DAM drops due to something wrong with one of the pumps?

I would reach out to torqued solutions since you are running their tune.

Is their e30 tune meant to run only on e-mixes and not straight 93? are you mixing appropriately to get e30? Were you running 93 when this happened, or an e-mix?

They will probably request logs. So DO NOT reset you ecu anymore. There are forum members that can help analyze data logs as well and maybe point out potential issues that are causing the DAM to drop.

Contact Torqued and data log.

Hope the solution is a simple and easy one!
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Old 12-02-2019, 04:23 PM   #3
3eyesraver
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Quote:
Originally Posted by noobultimatum View Post

1.41 tends to be a/c compressor kicking on... but your DAM is being effected so i do not think it would be the compressor.

Perhaps your LPFP or HPFP is having an issue with keeping fuel at the injectors when tank starts to run low? I've never heard of that happening, but if the DAM drops consistently at 1/4 tank, maybe the issue is related? Maybe the car runs slightly lean when DAM drops due to something wrong with one of the pumps?
I got -1.41 quite often but my DAM never dropped.

I totally agree on the LPFP/HPFP issue. Are you on Ethanol? Stock fuel pump?
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Old 12-02-2019, 05:52 PM   #4
Skim302
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Iím sorry for the slow response, I just got off of work.

I know that resetting the ECU isnít the best option but impatience got the best of me. I havenít reset it in a couple of days though.

I am running straight 93 Octane so no upgraded fuel pump or anything.

I donít run the A/C when I have the heat on and I tried running with the heat off as well and I still got FBK and FKL.

I bought some new spark plugs because I heard a dirty plug could be causing the issue. Iím at 50k so I was planning on changing them soon anyway I just have to wait for them to come in.

I am planning on datalogging whatís going on and sending it to Torqued. Heía always been real good with questions. I was just hoping it was an easy fix.
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Old 12-02-2019, 05:59 PM   #5
noobultimatum
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Quote:
Originally Posted by Skim302 View Post


I bought some new spark plugs because I heard a dirty plug could be causing the issue. Iím at 50k so I was planning on changing them soon anyway I just have to wait for them to come in.

I am planning on datalogging whatís going on and sending it to Torqued. Heía always been real good with questions. I was just hoping it was an easy fix.
Report back on the spark plugs and the tuner opinion when you get the chance.
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Old 12-03-2019, 02:38 PM   #6
Mike1Juliet
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DAM drops are normal. DAM drops could be caused by who knows how many things but the primary response is because your ECU sees something and finds it necessary to retard the timing. This is normal, the car is protecting itself and there is literally nothing to worry about.

You're going to drive yourself nuts trying to figure out what exactly is causing it. Seriously stop looking at it, don't worry about it and let the car do what it was designed to do. Your car will advance the timing when it determines its right to.
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Old 12-03-2019, 02:55 PM   #7
3eyesraver
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Quote:
Originally Posted by Mike1Juliet View Post
DAM drops are normal. DAM drops could be caused by who knows how many things but the primary response is because your ECU sees something and finds it necessary to retard the timing. This is normal, the car is protecting itself and there is literally nothing to worry about.

You're going to drive yourself nuts trying to figure out what exactly is causing it. Seriously stop looking at it, don't worry about it and let the car do what it was designed to do. Your car will advance the timing when it determines its right to.
I agree with Dam dropping is normal. Maybe OP was paranoid and I'm not embracing it. But Dam consistently dropped whenever his tank drop to 1/4 is strange.
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Old 12-04-2019, 12:03 AM   #8
Mike1Juliet
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Quote:
Originally Posted by 3eyesraver View Post
I agree with Dam dropping is normal. Maybe OP was paranoid and I'm not embracing it. But Dam consistently dropped whenever his tank drop to 1/4 is strange.
I chased this around a ton. On the hottest summer days I got DAM as low as 0.6 what ever the tailing digits are. Every time the dam has dropped it has always come back up eventually.

They should really just hide half this crap from the user or just display some kind of message "hey if you're not a professional take these numbers with a grain of salt" or something.
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Old 12-04-2019, 09:40 AM   #9
Skim302
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I got the spark plugs in but havenít found the time to replace them yet. The DAM hasnít corrected itself yet. Iím kinda torn on whether I should try changing the spark plugs or just hope the car sorts itself. I think I have to remove the battery to replace the plugs and that would reset all the learning the car has done.
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Old 12-04-2019, 11:56 AM   #10
gn4rwhals
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Replace plugs and monitor.

If its going to knock its going to knock, resetting learning will not prevent that.
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Old 12-04-2019, 01:34 PM   #11
3eyesraver
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Just happened to me last night. Dam stays .875.
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Old 12-04-2019, 04:24 PM   #12
CGumina
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Quote:
Originally Posted by Skim302 View Post
I got the spark plugs in but havenít found the time to replace them yet. The DAM hasnít corrected itself yet. Iím kinda torn on whether I should try changing the spark plugs or just hope the car sorts itself. I think I have to remove the battery to replace the plugs and that would reset all the learning the car has done.
Removing the battery will definitely reset the learning, but if you're changing the plugs anyway, what does it matter? Just drive it gently and let the ECU adapt in case there is still knock issues.

You ARE at 50k miles, it may not be unheard of that you need to do a walnut blast, either.
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Old 12-04-2019, 05:40 PM   #13
Smaay
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i have the same issue, on hot days, or just random. it drops but always works it way back up on the same day.
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Old 12-04-2019, 08:40 PM   #14
Skim302
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I just changed the plugs and they didnít seem too burnt. I did notice a difference while driving though. The car just feels more healthy but I only drove it for about 15 minutes so I guess we will see as time goes on.

I would definitely like to do the walnut blasting soon like you mentioned, maybe after the holidays.
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Old 12-05-2019, 02:08 PM   #15
Brandon_812221
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Iíve always found this to happen to me due to bad gas or elevation change
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Old 12-05-2019, 03:52 PM   #16
3eyesraver
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Iíve always found this to happen to me due to bad gas or elevation change
Elevation change suckssss
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