Log Review Please! Stage 2

[sqitis]

Ok I ran some logs with this tune and not sure how healthy the car is so I thought I might post and get feedback. Any suggestions to what is wrong/right/just fine would be great.

[sqitis]

Then after a couple of pulls I got a code for 17963 - Charge Pressure: Maximum Limit Exceeded Intermittent. Anyone have ideas as to why I got this and why it didn't throw a CEL? I cleared it and it seems to run better afterwards.

TIA!

[infinkc]

Looks like your n75 is bad, or you have a boost leak

[sqitis]

New N75 about 3 months and I think my spider hose has crack and leaks in various places. Would the spider hose cause this as well? I did a half ass repair to it back in the summer but I don't think it's working.

[ride1157]

I have gotten this code before, boost leak for me. Just test it with a home depot pressure tester really easy to make. Good luck hope that is all your issue is.

[Malmhead]

New N75 about 3 months and I think my spider hose has crack and leaks in various places. Would the spider hose cause this as well? I did a half ass repair to it back in the summer but I don't think it's working.

I am running that same tune and also got that code, it won't light the CEL when the code it is thrown.

I switched over to t-bolt clamps since my worm gear hose clamps were consistently developing leaks. (I would pressure test [with this kit], everything would be okay, go run the car, come back pressure test again, and I have a leak)

Even after switching out the clamps, I did feel the throttle cut from the overboost condition once during a few runs. Although I didn't clear the code from the time before that because I don't think the car would really need to do anything (such as the throttle cut) unless the charge pressure is over the limit. I'll try clearing the code and let you know the results.

I'm going to replace my N75 soon anyway and see if that helps, its still the original after 70k miles.

[zillarob]

Is this nvr tune from nef? Maybe put up requested vs actual boost.

From s4wiki
You will throw a 17963 Charge pressure: Maximum limit exceeded code if your boost deviation is too high:
KFDLULS - Delta pressure for overboost protection
If you are running significantly more boost than stock, or you have made changes to the boost PID, you may have to increase these limits. The most unsophisticated way is to simply max the entire table. Obviously, you will get better results if you spend a bit more time tuning this table to something appropriate. It is generally not a good idea to disable too many safety features, particularly when it comes to boost.

[Malmhead]

Is this nvr tune from nef? Maybe put up requested vs actual boost.

Yes it is.

I
From s4wiki
You will throw a 17963 Charge pressure: Maximum limit exceeded code if your boost deviation is too high:
KFDLULS - Delta pressure for overboost protection
If you are running significantly more boost than stock, or you have made changes to the boost PID, you may have to increase these limits. The most unsophisticated way is to simply max the entire table. Obviously, you will get better results if you spend a bit more time tuning this table to something appropriate. It is generally not a good idea to disable too many safety features, particularly when it comes to boost.

I don't have tunerpro (or any of the other files for that matter) on my PC here, did NVR touch this table?

[zillarob]

KFDLULS not modified. I have no idea if it needs to be, just remember seeing that on the wiki.

[sqitis]

Yea I'm running NVR tune and I can feel the boost/throttle cut. Not real sure what to check other than my crappy spider hose. Does that code throw the car into LIMP?

[zillarob]

Ive never thrown that code but I could see it zeroing the n75 dc and maybe cutting fuel. I know neg deviation will put it into soft limp.

[Malmhead]

Yea I'm running NVR tune and I can feel the boost/throttle cut. Not real sure what to check other than my crappy spider hose. Does that code throw the car into LIMP?

It won't put it into limp, if you have a boost gauge you'll see you can boost back up to 20PSI after several seconds. I did notice I don't make much if any boost in second after it happens, but 3rd/4/th/5th all hit pretty high.

[sqitis]

It feels ok sometimes and then sometimes it feels like it falls on it's face. Got to be a boost leak somewhere?? Time to test for it I guess!!

Edit: How do you guys get the right amount of PSI through the AWE Boost tester?

[Don Supreme]

Logs look fine... might be a tune issue.

Otherwise, make sure your wastegate pressure lines are not torn.. (Very common thing for these cars at this age).

[zillarob]

Think if its bad enough it can kick the n249 to open the dv too.

on a side note rolex is on

[sqitis]

Logs look fine... might be a tune issue.

Otherwise, make sure your wastegate pressure lines are not torn.. (Very common thing for these cars at this age).

The smaller hose coming off the wg that go over to the turbo housing correct?

[sqitis]

[QUOTE=zillarob;7230251]Think if its bad enough it can kick the n249 to open the dv too.

on a side note rolex is on

Oh sweet thanks for reminding me!!

[mightemouce]

looks like its running a bit rich could be a boost leak or just the file. Did you tweak his file at all? I used it as a base for my stage 3- minus tune and I had to pull some fuel from it.

[RedB5S4]

You could check / change your spider hose to see if that helps anything. I just replaced all the hoses on mine with rubber heater hose as opposed to that plastic tubing that the OEM piece uses. I think I had a vaccum leak that was causing a rough idle, multiple random misfires, and my car to run really rich. That, coupled with a bad primary o2 sensor and my car was running like shittttt. Swapped out the spider hose, changed my o2 sensor, threw in some new plugs and it's been running fine ever since.

[Malmhead]

Regarding the N75, I saw this quote

Locate N75 and remove bottom vacuum hose. Blow into the tube and see if it holds pressure. It could be a leak in the waste gate line causing over boost.

According to this picture, isn't the wastegate line the one that points to the firewall, and not the bottom hose? Or does blowing into the charge pressure line indicate a fault with the wastegate?

Results of sucking off my car:
Holds pressure in wastegate line.
Does not hold pressure in charge pressure line (air flows).

[zillarob]

Results of sucking off my car:
Holds pressure in wastegate line.
Does not hold pressure in charge pressure line (air flows).

Thats how it should be.
Be careful sucking off your car, I hear it can cause cancer. Might be only in California though.

[Malmhead]

Thats how it should be.
Be careful sucking off your car, I hear it can cause cancer. Might be only in California though.

Sorry, I meant blowing my car, does that still cause cancer?

[zillarob]

Sorry, I meant blowing my car, does that still cause cancer?

I think thats the same, but doesnt look like you are in Cali so you should be fine. lol

[DanS4]

Regarding the N75, I saw this quote




According to this picture, isn't the wastegate line the one that points to the firewall, and not the bottom hose? Or does blowing into the charge pressure line indicate a fault with the wastegate?

Results of sucking off my car:
Holds pressure in wastegate line.
Does not hold pressure in charge pressure line (air flows).

You are correct. I was incorrect. Blow in the tube, do not suck.



Wastegate line will hold pressure,increase pressure the wastegate rods will move.



SQitis - pressure Test - spray soapy water everywhere.

Good to see you got Ecu-X to work.

[sqitis]

Thanks Dan! ^ We have a fogger machine at my buddies shop so we are going to try that and see what we find.

[sqitis]

I've got traces of oil in various places all over the spider hose and the F hose up front as well as the check valve by the F hose. I bet this is my leak culprit!

[Malmhead]

So I caught the overboost condition... not sure what I should be looking for, but looks like A/F goes crazy and everything goes downhill from there...

[sqitis]

Ok so what do you think is causing my A/F to go crazy?? LOL

[Malmhead]

Ok so what do you think is causing my A/F to go crazy?? LOL

haha sqitis, not sure if you saw, but I am running the exact same tune and have the exact same problem! Those are my logs :)

[sqitis]

haha sqitis, not sure if you saw, but I am running the exact same tune and have the exact same problem! Those are my logs :)

Must be the cold ass 35* here in Indiana! That probably means my actual is off the chart and I can't see it. Tailpipes are blacker than usual so yea must be running rich.

[NOTORIOUS VR]

Interesting that this is happening to more then one person... good to know.. I will have to take a look at the tune and see what might be causing this...

It looks like it's boosting more then requested when it happens right around 3k RPM... maybe have to loosen up N75 duty a bit down there or something. I'll have a look in the next few days.

[zillarob]

Is the 35% throttle blade normal?
Maybe at only 35% charge air is packing up behind it and being read by the map giving an artificially high reading (more pressure at blade than what the cyl are actually seeing).
Can you open the blade more here?

PS: I dont know much about tuning this stuff but the neighbor has some goats we could sacrifice if you think it would please the me7 gods

[phila_dot]

sqitis, your logs look good. I see no evidence of a hardware problem. FYI, that's not a deviation code. The max charge limit just needs to be raised in the tune.

What are you guys using for actual lambda?

Malmhead, you have negative deviation, load intervention and throttle cut. It does look like you have a decent boost leak.

Neither of you are "overboosting".

[Malmhead]

sqitis, your logs look good. I see no evidence of a hardware problem. FYI, that's not a deviation code. The max charge limit just needs to be raised in the tune.

What are you guys using for actual lambda?

Malmhead, you have negative deviation, load intervention and throttle cut. It does look like you have a decent boost leak.

Neither of you are "overboosting".

I pressure tested to 25 PSI. I don't have a leak.

Both of the cars are throwing an overboost code. ** My actual is 22PSI, my desired is 18PSI, how is that not overboost?

[sqitis]

sqitis, your logs look good. I see no evidence of a hardware problem. FYI, that's not a deviation code. The max charge limit just needs to be raised in the tune.

What are you guys using for actual lambda?

Malmhead, you have negative deviation, load intervention and throttle cut. It does look like you have a decent boost leak.

Neither of you are "overboosting".

Thank you for the info!! I don't know enough about this logs yet to know if something is wrong or right. Not sure what you mean by actual lamba?

NVR- can you adjust the tune to raise the charge limit? Let me know I also posted on Nefm.

Thanks guys for all the input, I do appreciate it!!

[zillarob]

I pressure tested to 25 PSI. I don't have a leak.

Both of the cars are throwing an overboost code. ** My actual is 22PSI, my desired is 18PSI, how is that not overboost?

Thats me7 for you, pos and neg deviation seem bass ackward too.

Dont think I would raise the limit to accommodate k03s blowing over the map limit.
Looked pretty spot on with the blade open so makes me wonder if opening it more and letting that pressure into the engine would help. Why is the map not in the manifold anyway? lol

[phila_dot]

I pressure tested to 25 PSI. I don't have a leak.

Both of the cars are throwing an overboost code. ** My actual is 22PSI, my desired is 18PSI, how is that not overboost?

Sorry, post was a little hasty.

You have positive deviation, but again the code listed by sqitis is not a deviation ("overboost") code. My guess is N75 or another hardware failure.

Not to play word games, but in ME7 overboost is not related to positive deviation. It is a (disabled) function to provide more power under certain conditions.

[zillarob]

All graphs are almost identical up to ~3300 with the exception of act boost and throttle blade. Is this a wot/open loop vs closed loop thing maybe?

[Malmhead]

Sorry, post was a little hasty.

You have positive deviation, but again the code listed by sqitis is not a deviation ("overboost") code. My guess is N75 or another hardware failure.

Not to play word games, but in ME7 overboost is not related to positive deviation. It is a (disabled) function to provide more power under certain conditions.

I have a new N75 coming next week (mine is probably the original with 70k miles), so I'll relog at that time and update. However, sqitis says his N75 is a mere 3 months old.

[phila_dot]

Malmhead, another apology. Checked my notes and you were on the right track.

This is the KFDLULS error.

Stock configuration in most conditions:

|requested - actual| > 250 mbar (3.6 psi) for more than 0.5 seconds.
^ Absolute value ^

The map just needs to be fudged a little on initial ramp.

In the case of your logs though it looks like hardware causing limp.