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Old 08-24-2012, 02:35 AM   #1
Coreycarlile911
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Default help with car (datalogs)

So i have myself 06 sti with k@n intake, catless exhaust, gm 3 port and perrin turbo inlet. I have been noticeing latey the car hesetates when i am at wot under 2500 rpms. It will feel slugish one pull then the next be fine and pull hard. I think maybe i need a new 02 sensor but would like some info on how this log looks. temp was bout 65,car has 100k on it,did third gear pull around 2500 to 6500. I understand the fine knock is most likely road noise but the timing and a/f are my main concern and i have no idea what is normal. o and it is also protuned by cobb, this is my 17 psi map. If some tuners or people that understand all the datalog info could chime in and help me out it would be awesome.

https://docs.google.com/spreadsheet/...0QVhudWc#gid=0
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Old 08-24-2012, 02:45 AM   #2
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Your tune sucks. Or somethings wrong.

Your LTFTs are off 10%
You aren't hitting target boost by 3+psi.

You'll also get better resolution if you don't log so many parameters. You don't need to log MAF volts AND MAF g/sec. There are others you don't need as well.

Also, if you are having problems in an area log that area and post that up. You said WOT <2500 but that log shows WOT after that.
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Old 08-24-2012, 02:52 AM   #3
Coreycarlile911
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Quote:
Originally Posted by ProfessWRX
Your tune sucks. Or somethings wrong.

Your LTFTs are off 10%
You aren't hitting target boost by 3+psi.
Well something is prob wrong cuz it was dyno tuned by tim b at cobb. Im gonna post up another log i did right after and its same as last third gear 2500 to redline. But could this be 02 sensor related by chance. I just replaced maf. If it was engine failure related wouldnt it knock more and lower dam? These are just default log listen on ap which everyone says has all essential logs.
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Old 08-24-2012, 02:59 AM   #4
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Could be an O2, could be a vacuum leak, could be a crappy tune... I would hope/assume it's not the tune being a Cobb protune.

I don't see the O2 messing up your target boost like a vacuum leak would.
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Old 08-24-2012, 03:00 AM   #5
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Here is same log right after i did the other log. looks pretty close to the same but might help.

https://docs.google.com/spreadsheet/...3ZXYwUGc#gid=0
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Old 08-24-2012, 03:04 AM   #6
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Quote:
Originally Posted by ProfessWRX
Could be an O2, could be a vacuum leak, could be a crappy tune... I would hope/assume it's not the tune being a Cobb protune.

I don't see the O2 messing up your target boost like a vacuum leak would.
ya its cobb protune at portland location a year ago. This is my 17 psi map and it overboosts useually so idk why its underboosting.
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Old 08-24-2012, 04:20 AM   #7
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How about posting or moving this to the Tuning section???? wtf
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Old 08-24-2012, 05:10 AM   #8
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Originally Posted by UK-Wagon
How about posting or moving this to the Tuning section???? wtf
Im not tuning or asking for tuning advise, im trying to figure out a mechanical issue in my Factory 2.5 L turbo powertrain. So what about that has to do with tuning. But im not gonna argue, i really do need help figureing this out and dont want this post to turn into another war about what catagory this falls under. Just some help plz thats all i want... Tks
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Old 08-24-2012, 06:21 AM   #9
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Your A/F learning is out of spec ... Cobb recommends under +/- 8 on that.

Also, I'm not convinced your knock is road noise since it is in both logs, and is about the same amount in both logs, at roughly the same boost point. I've had road noise show as knock in my logs before, but I'll do 2 pulls and it is only in 1 log, and is a very small amount .. not in both logs in the exact same spot.

If Cobb protuned your car, why not give them a call? I'm sure if there is a tuning issue, they would be happy to take a look at your logs and help you figure the issue out.
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Old 08-24-2012, 10:53 AM   #10
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Quote:
Originally Posted by GrumpyPitbull
Your A/F learning is out of spec ... Cobb recommends under +/- 8 on that.

Also, I'm not convinced your knock is road noise since it is in both logs, and is about the same amount in both logs, at roughly the same boost point. I've had road noise show as knock in my logs before, but I'll do 2 pulls and it is only in 1 log, and is a very small amount .. not in both logs in the exact same spot.

If Cobb protuned your car, why not give them a call? I'm sure if there is a tuning issue, they would be happy to take a look at your logs and help you figure the issue out.
Ya ive been going back and fourth with them over email and have called bout this issue and bout ten others. I feel like im getting annoying tho so i wanted to try here first
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Old 08-24-2012, 02:32 PM   #11
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Quote:
Originally Posted by Coreycarlile911 View Post
Ya ive been going back and fourth with them over email and have called bout this issue and bout ten others. I feel like im getting annoying tho so i wanted to try here first
He's right about the knock. You need to look into that for sure.

And you're a paying customer with what I would call a potentially bum product. Do not worry about irritating them.
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Old 08-24-2012, 03:16 PM   #12
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Ya im gonna give um another call but it sucks cuz they are the closest tuning shop to me and its eight hours away. So kinda hard to diagnose the car without being able to look at the car. Its just long process of calls and emails to fix every stupid problem i have. that being said i just wanna see what everyone thinks here might save me some time.
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Old 08-24-2012, 07:27 PM   #13
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Quote:
Originally Posted by Coreycarlile911 View Post
Ya im gonna give um another call but it sucks cuz they are the closest tuning shop to me and its eight hours away. So kinda hard to diagnose the car without being able to look at the car. Its just long process of calls and emails to fix every stupid problem i have. that being said i just wanna see what everyone thinks here might save me some time.
Ahh ... sucks that is your closest tuner, but your issue could be many things. It may simply be a tuning issue, or it could be mechanical ... tough to say without seeing the car and tinkering with it. From your logs though, I would say you have a knock issue.

You have other options, like an email tune. In those, you tell the tuner what mods you have, and they make a base map. Then you do some pulls, and send the logs to them. They then fine tune the map. You keep doing this back and forth with them until it is running good. I've never done an e-tune, but many on this forum have and speak highly of some of the companies that do it.

Your other option is to keep working with Cobb on the issue. But my guess is that eventually they are going to want to see the car.
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Old 08-24-2012, 07:01 PM   #14
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Because you would net better answers there..... most people in this section have no clue how to read a data log, let alone diagnose off of reading one. It was a suggestion, because it makes more sense. If you want help, youre best answers to this will come from that section.
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Old 08-24-2012, 08:55 PM   #15
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Quote:
Originally Posted by UK-Wagon
Because you would net better answers there..... most people in this section have no clue how to read a data log, let alone diagnose off of reading one. It was a suggestion, because it makes more sense. If you want help, youre best answers to this will come from that section.
Ya didn't mean to be a ass this has been issue for while and cant communicate with cobb very well as there very busy and 8 hours away. Whats weird is that i have like 15 different maps and this one is my 17psi and today i reflashed my 16 map and the car runs much better than as the ecu learns for bit it starts to go back and ends up have logs like the ones on here. Im gonna reflash again and datalog right after the flash and post that up and see how much different they are. But ya thats why i said tuners and people that know what there talking bout cuz i just need some good advise.
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Old 08-24-2012, 09:00 PM   #16
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Quote:
Originally Posted by GrumpyPitbull

Ahh ... sucks that is your closest tuner, but your issue could be many things. It may simply be a tuning issue, or it could be mechanical ... tough to say without seeing the car and tinkering with it. From your logs though, I would say you have a knock issue.

You have other options, like an email tune. In those, you tell the tuner what mods you have, and they make a base map. Then you do some pulls, and send the logs to them. They then fine tune the map. You keep doing this back and forth with them until it is running good. I've never done an e-tune, but many on this forum have and speak highly of some of the companies that do it.

Your other option is to keep working with Cobb on the issue. But my guess is that eventually they are going to want to see the car.
Ya there should not be anything wrong with the tune the car has all same parts as when it was tuned on dyno. So i don't think getting a e tune will help much.
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Old 08-25-2012, 12:01 AM   #17
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So today i was messing around with live data and looked at fine knock and at idle it sits at .4 and when i cruise its at 0 and for a second as soon as i add throttle it goes to 1.4. Then i was watching the a/f learning 1 and at idle it will sit at -8.6, then cruise it drops to round -4, then at wot it will jump to positive 10 and the car will hesitate for second then take off normal. Wtf is going on here i cant get ahold of my tuner so any help would be greatly appreciated.
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Old 08-25-2012, 05:10 AM   #18
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Woah, thats no bueno! Check the spark plug gap, you shouldnt be seeing knock like that, or at all! Something is wacky with timing or related to that. Such as spark plug gap or timing advance is way way off.
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Old 08-25-2012, 02:08 PM   #19
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Quote:
Originally Posted by UK-Wagon
Woah, thats no bueno! Check the spark plug gap, you shouldnt be seeing knock like that, or at all! Something is wacky with timing or related to that. Such as spark plug gap or timing advance is way way off.
Ok im doing new plugs,02 sensor, and knock sensor and hope this helps. But should i be getting a cel cuz its never thrown one.the car just felt weird so i started loging.
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Old 08-25-2012, 04:25 PM   #20
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I got new ngk iridium and there same as i have now and my understanding is no need to gap right. I got 02 sensor on order. Im also replaceing timing belt, water pump and thermostat. After all that hope it runs better. I skiped the knock sensor for now.
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Old 09-04-2012, 01:15 AM   #21
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Well today i found that a hose had poped off that connects to the intake. Im not sure what it is to or what it does but the hose was connected to the intake, after the maf and runs right down on the left side of the intake manifold and this is where it poped off. There is a little round black thing inbetween the lines. Looks like some sort of regulator. But anyone know what this hose is for.idk how much this contributed to my af learning 1 being so far out of spec but i have a feeling it was the main cause.
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Old 09-04-2012, 01:40 AM   #22
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Some pics might help, but I think I can picture the hose you are talking about.

I'm no expert by any means but I'd venture a guess that if you have a disconnected hose somewhere in the intake allowing the engine to suck in unmetered air, this could definitely be screwing with your A/F learning.

However, I doubt this is causing the fine knock learn you are seeing. Connect the hose and run another log for us.
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Old 09-04-2012, 02:20 AM   #23
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Quote:
Originally Posted by sc00ter
Some pics might help, but I think I can picture the hose you are talking about.

I'm no expert by any means but I'd venture a guess that if you have a disconnected hose somewhere in the intake allowing the engine to suck in unmetered air, this could definitely be screwing with your A/F learning.

However, I doubt this is causing the fine knock learn you are seeing. Connect the hose and run another log for us.
Ya ill run some new logs tomorrow and see what they say i hope to god it was that hose or the 02 sensor. The knock may have been so crappy gas i put in that day cuz i did check on live data the fine knock and at idle it was sitting at -.9 and now that i changed all that and got full tank of gas from the station i always go to it sits at 0.
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Old 09-05-2012, 02:27 AM   #24
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so im working on geting a picture up on the hose, but here is my last log everything looks solid except the feedback knock. This kinda scares me. Cuz from my understanding this is an actual knock event where the car is pulling timimg from and it turn something is not right. I dont know whole lot so can i get some help on how serious this is.

https://docs.google.com/spreadsheet/...5YkpjbHc#gid=0
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Old 09-05-2012, 02:50 AM   #25
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Here is the hose it poped off down by the intake manifold and connected to that round thing that is also connected to the intake.

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