K04 loss of power, have some logs

[FrancoTheTanko]

Lately I've felt a loss in power. I logged blocks 003, 031, and 115 today and noticed my max air flow was only about 157g/s. I just replaced both o2 sensors and put in new F6DTC plugs and all my mods are in my sig. I have the log file to email to anybody willing to help. I tried doing a leak test a couple weeks ago but I was short on daylight so it wasnt a thuro job. I plan on doing a good one tomorrow.
I'm using a hacked version of 409.1 vagcom so I don't trust the values totally. It was saying my intake temp was 60C but after I let the car sit for an hour off, it said the temp was 75C is it supposed to be Fahrenheit?
I also logged block 020 for one 3rd gear at WOT if that would help. I have been getting misfires sparatically but I think they only occur at idle. Any help will be greatly appreciated. Thanks.

[FrancoTheTanko]

Oh yea, block 032 shows after driving about 80 miles, Idle +3.8% and Partial Throttle -7.8% o2 adaptation values.

[gotaudi]

where are the logs?

[FrancoTheTanko]

http://www.mediafire.com/?wihomqly2t1

http://www.mediafire.com/?mvctg0eomyg

[mike-2ptzero]

Oh yea, block 032 shows after driving about 80 miles, Idle +3.8% and Partial Throttle -7.8% o2 adaptation values.

Those readings usually suggest a boost leak after the turbo.

Logs look fine. Your maf and load readings will be lower because of the larger maf housing. AFR in in the mid 11:1 where it should be and the timing CF readings are good.


For the IAT were you looking at block 004?

[FrancoTheTanko]

For the IAT were you looking at block 004?

Yea I think it was 004.

I read somewhere that i should be seeing like a max airflow of up to 220g/s though. I know its a bigger MAF but I have the TT sensor in there also which the software calls for.

[mike-2ptzero]

Yea I think it was 004.

I read somewhere that i should be seeing like a max airflow of up to 220g/s though. I know its a bigger MAF but I have the TT sensor in there also which the software calls for.

220 on a K04? The K04 doesn't flow all that much more then the K03s, the Xchip with a K03s and stock maf doesn't even hit 180 g/s.



(added)

I searched and all of the guys said they were hitting 170's with the TT maf sensor/housing. One put the TT sensor into his stock housing and hit 220 g/s but was running way to rich.

here is that thread

[FrancoTheTanko]

Well I'm using the stock airbox also. I just bored out the hole for the original MAF and I just streched the original TIP over the 3".

[FrancoTheTanko]

Those readings usually suggest a boost leak after the turbo.

And where exactly do you mean by after the turbo? In the exhaust or within the system?

[gotaudi]

well if you have a boost leak (in the system) after the turbo, your part throttle fuel trims will indicate a rich condition, 7.8% is getting to the point where the tune is a lot different than what it intended to run at. Simple solution... find the boost leak, fix it and your fuel trims should decrease.

[FrancoTheTanko]

I found a leak in the fitting around my DV so I took it out, cleaned it and greased it up. When I test drove it, it seemed to be a little bit more powerful but I didnt have my cpu with me to log. It got dark so I couldnt do more testing. Guess I'll have to wait until tomorrow.

[FrancoTheTanko]

I just hooked up the vag and saw that the adaptation values changed to Idle +3.6% and Partial Throttle -8.4%.

I also had a code 16804/P0420/001056 - Catalyst System; Bank 1: Efficiency Below Threshold. I forgot to mention a couple weeks ago I found that one of the bolts on my exhaust after my cat was missing so I replaced it. I'm not sure how long it was gone for but could that have messed up my cat?

[mike-2ptzero]

No the cat should be fine.


BTW when I said the 032 block readings suggest a leak I meant a leak in the intake system after the turbo since there is unmetered air being sucked into the engine during idle and air being lost during part throttle. Might want to do a pressure test to find the leak.

[FrancoTheTanko]

I'll do another one today. I'm also going to pick up some Sea Foam.

[FrancoTheTanko]

Alright, I did a more thuro boost leak test today and found that one of the one way valves at the back of the engine was leaking around the seal. I put some super glue around the seal and that fixed that.

I then continued to test but couldnt hear anything else. I then noticed there was a good amount of air coming out the pipe below.


I pressured the system up to 20psi and it took about 30-45 seconds to leak out. Should the system hold the pressure for longer?

[FrancoTheTanko]

I got the camshaft chain tensioner replaced at the beginning of the summer because it was knocking really badly. Could the mechanic have not installed a gasket correctly? If so, I'm gonna puch him in the head! jk I should have done it myself but I didnt have the time.

[FrancoTheTanko]

Wll I found a tut for replacing the camshaft tensioner. I think it might have been harder than I thought. Could the air be leaking though the cylinder heads? Is that why I hear oil dripping so much during the test?

[20A4Audi1.8t01]

damn this sounds like a similiar problem that I have but have no Idea where the leak is coming from took it into Eurotechnik and Dave tightend the compressor side and replaced a torn vac line, ran a little better but still not boosting right. He said that it could be the injectors not sitting right and low enough so I bought some OEM TT 386cc injectors lets hope this solves it. Theyll be here mon.

btw this all happened after I installed the RaceTec.

[FrancoTheTanko]

I'll mess around with it some more tomorrow and let you know.

[20A4Audi1.8t01]

ok thanks

[FrancoTheTanko]

I tried to fool around with the angle of the injectors but nothing changed. I also sea foamed it but still nothing changed. I really think I just have a bad leak within the engine becuase my o2 adaptation values are now at Idle +4.8% and Partial Throttle -10.3%.

This sucks.

[20A4Audi1.8t01]

yeah I know what you mean, I dont even know where to start my friend and I did the pressure test sounded like the leak was coming from the intake mani side like underneath behind all over. When I took it into Eurotechnik Dave said everything looked and sounded fine so i dunno

[FrancoTheTanko]

When I did my test I didn't hear anything at all, I just felt a good amout of air coming out that pipe. You should do it again and spray soapy water all over everything and look for bubbles. How long did the system stay pressurized? Because mine looses pressure almost immidiately, it just takes like 30 secs to go to 0.

[20A4Audi1.8t01]

yeah it didnt stay in very long at all prolly bout 20 secs or so.

[20A4Audi1.8t01]

well put the TT 386cc injectors in and that didnt help! stumped

[FrancoTheTanko]

I'm going to get a compression tester on monday. I really hope the test turns out fine.

[biketsai]

well put the TT 386cc injectors in and that didnt help! stumped

Maybe you need spacers?

[FrancoTheTanko]

I went to the local automotive store today and they wanted $45 for a compression tester so I just ordered one off ebay for $22.

As for the spacers, all they do is set the fuel rail a certain height above the engine block. If he had no spacers the injectors would be sitting down low enough but the angle may be off.

[FrancoTheTanko]

I think I may have figured it out. I drove the car for a while with the bad tensioner. It may have messed up the valves. So I am assuming the valves are bad but I guess I need to do a leak down test to figure it out. I'll let you know the results of the compression test.

[20A4Audi1.8t01]

awesome thanks! has your car been leaking oil like mine?

[FrancoTheTanko]

No it actually hasn't that's why I think it's the valves unless I'm mistaken. If it is, I have 2 weeks off before school which should be long enough to fix it myself.

[20A4Audi1.8t01]

yeah mine has been leaking for awhile now but seemed to be boosting fine until I put the fmic on. don't have a boost gauge yet so not sure what it was boostin and what it is now

[FrancoTheTanko]

Oh yea, you definitely need a boost gauge.

[mike-2ptzero]

When I did my test I didn't hear anything at all, I just felt a good amout of air coming out that pipe. You should do it again and spray soapy water all over everything and look for bubbles. How long did the system stay pressurized? Because mine looses pressure almost immidiately, it just takes like 30 secs to go to 0.

It is going to go down to zero if you are not keeping a good supply of air while doing the test. The air is going to exit the system no matter, thru the exhaust valves or the rings.

[FrancoTheTanko]

Did the compression test today. Starting from the front:
1: 185
2: 180
3: 180
4: 190
I did notice my spark plugs came out easily, maybe cause I put them in when the engine was cold and took them out when it was hot. I don't know whats the matter with this thing. Unless I'm used to the power, could that be?

[FrancoTheTanko]

The only thing that I haven't upgraded, which GIAC "requires", is the Green Coolant temp sensor. Would this really matter? I also don't have a CAI but they say the stock air box is fine also.

[FrancoTheTanko]

Check that, I do have the Green Coolant temp sensor. I'm pretty sure I dont have a boost leak. Could the bad fuel trim numbers be coming from a shitty fuel pump or fuel filter? Is that possible?

[mike-2ptzero]

No because your not lean at part throttle.

[FrancoTheTanko]

nevermind, I read the fuel trim page on the ross-tech page and I now understand it better. I'm gonna do some more pulls soon seeing I only have class 3 days a week. I love being a Super Senior.

[Brooksthepro]

hey guys. I had a similar problem when i was putting together my hammer setup. I would see really random boost numbers, surging etc etc. I got a parallel manual boost controller from vast performance and a new n75 and its ran great ever since. From what iv seen, the n75 seems to fart out soon after going hammer if u havent replaced it to the newest one. i think its the F valve.