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View Full Version : K04 GIAC k05 software problems....



TurbousMaximus
04-17-2007, 07:52 AM
Ok, so after weeks of trying to figure out whats wrong with my car i decided to post. Whenever im running the k05 software on my k04+5 bar the car runs like crap. Fuel trims are at -23.7(super rich) and its surges and hesitates like crazy. If i flash to stock it drives fine. When i was running GIAC k03 file it ran fine too.

The only problems i have with my car that i know of, is a bad rear o2 sensor and a possible exhaust leak(not 100% sure). Only mods are the k04 and 5 bar. Maf readings are good, no boost leaks, n75 is good, im lost.

B5-B_Broke
04-17-2007, 07:56 AM
what mods?

a4cefed
04-17-2007, 08:01 AM
welcome to my problem for the past few months. im also out of ideas

B5-B_Broke
04-17-2007, 08:06 AM
get yourself an MBC and a adjustable FPR

TurbousMaximus
04-17-2007, 08:16 AM
i tried a mbc didnt do anything, the software was designed for a 5 bar fpr, other people seem to not have the problem(like modifieda4) i called AWE but they cant see me until May 1st.

B5-B_Broke
04-17-2007, 08:22 AM
does he have the same mods most problems ive heard about with software are that when they full throttle it get jumpy was associated with cold temps and that the 5bar wasnt exactly perfect for their software. do you even have a boost guage or anything else? search pc16 file and click on the one that says "ive searched and now posted pc16 file??" there some info on that there and a link to another thread i know you dont have the same software but the problem might be the same..

TurbousMaximus
04-17-2007, 08:25 AM
yah i have a boost gauge, the surging is crazy. I did a lot of vag logging and nothing seems strange, except the throttle body is opening 100% at like 50% throttle, but that may be normal for the software.

mike-2ptzero
04-17-2007, 08:26 AM
get yourself an MBC and a adjustable FPR

adjustable fpr wont help since it is just his part throttle fuel trim he is having issues with while his WOT 02 readings are perfect. If he lowers the fuel pressure to help the part throttle fuel trim his idle trim and wot will end up much leaner. We have been trying to figure out the issue on his car for a few weeks now but just cant seem to track it down and he has no boost leaks at all.


The other issue is that his car has a really bad surge issue at part throttle but this could also be caused by running so rich and the ecu having to pull back so much fuel.


He could try running 180tt injectors and a 3 bar fpr like ModifiedA4, it isn't cheap and might not even fix the issue which means he would have thrown money way for no reason.


The K05 file for the 2000 was tuned using stock injectors and a crushed 5bar fpr at Matrix and they did not have any issues.

AudiRacerS4
04-17-2007, 08:27 AM
you need to tune your fuel pressure

B5-B_Broke
04-17-2007, 08:27 AM
yah i have a boost gauge, the surging is crazy. I did a lot of vag logging and nothing seems strange, except the throttle body is opening 100% at like 50% throttle, but that may be normal for the software.

check those threads out i think a adjustable fpr will fix your problem and i hope you kept that mbc on there

a4cefed
04-17-2007, 08:30 AM
this programs are wrote to run a 5 bar and no MBC. so there is a problem if you need to add the adjustable fpr and mbc to get it to run right. hell i know in my situation the car ran fine withthe 5 bar and stock n75 and then one day these problems came up

AudiRacerS4
04-17-2007, 08:30 AM
well if your throttle boddy is opening 100% at 50% thats your problem

mike-2ptzero
04-17-2007, 08:39 AM
well if your throttle boddy is opening 100% at 50% thats your problem

How is that a problem? It is part of the dbw throttle program, even on his stock program the throttle goes 100% at anything over 50% throttle which we see on his block 054 logs.


an adjustable fpr wont help his fuel issue either because lowering it to bring the part throttle fuel trim down will then just cause his WOT to go very lean.

TurbousMaximus
04-17-2007, 08:40 AM
check those threads out i think a adjustable fpr will fix your problem and i hope you kept that mbc on there

check what threads out? Modifieda4 was running fine on his stock injectors and 5 bar fpr. The software was designed for it theres no need to get an adj. fpr.

does anyone have a log of a k05 file thats works fine, of block 054?

Mike and myself tried everything to pinpoint this problem the past few weeks. AWE even wants to charge me to diagnose the problem, $85/hr.

B5-B_Broke
04-17-2007, 08:41 AM
well i guess we can come to the conclusion that the k05 file suck and you should have gone j31 lol jk man

TurbousMaximus
04-17-2007, 08:44 AM
trust me...im going to tell them to flash on the j31 file to see if it fixes anything. But if the problem is anything other then the software, its just going to pull more timing and surge more.

B5-B_Broke
04-17-2007, 08:52 AM
yea will be a good way to isolate out the software but then your still stuck with a shitty problem but keep us posted.,

ModifiedA4
04-17-2007, 02:29 PM
as mentioned above, i ran the K05 program (with stock inj. and 5bar fpr) fine for a few years. in fact, dyno'd twice with good results.

the fact is, he needs no more mods to make it work. there is something busted and throwing more money and mods at it wont fix it.

here's some questions.

have you tried a K03 file and 4bar with your K04? this would eliminate any N75/boost leak/turbo type issues. the car should run pretty much ok.

that leaves either the programming/ecu or the 5bar fpr as being the issue.

is your ECU new? is the softcoding correct? did you do a scan of the fault codes of all the control modules?

does the throttle body adapt ok?

here are three CAPS runs with the K05+5bar fpr:
http://www.modifieda4.com/images/ecu-logs/ATW_K05_stockinjectors_5barfpr.sized.png

mike-2ptzero
04-17-2007, 03:09 PM
as mentioned above, i ran the K05 program (with stock inj. and 5bar fpr) fine for a few years. in fact, dyno'd twice with good results.

the fact is, he needs no more mods to make it work. there is something busted and throwing more money and mods at it wont fix it.

here's some questions.

have you tried a K03 file and 4bar with your K04? this would eliminate any N75/boost leak/turbo type issues. the car should run pretty much ok.

that leaves either the programming/ecu or the 5bar fpr as being the issue.

is your ECU new? is the softcoding correct? did you do a scan of the fault codes of all the control modules?

does the throttle body adapt ok?





Same ecu(just flashed by AWE) as he was running with the K03. When he runs the "stock" flash program the car runs just fine. Problem only seems to be with the "K05" flash and at part throttle.

Only code he gets is for his post cat 02 sensor and now a CEL for the part throttle fuel trim being too high. He has done plenty of tba's and the problem is still there.


BTW he is hitting 194.86 g/s @ 5440 rpm with the K05 file. But since he lifts at that point it should hit a bit higher by 6500.

2600 62.25
3000 111.83
3600 134.22
3840 40.33
4080 118.44
4320 113.53
4720 176.86
5120 192.25
5440 194.86

Another log of his

2720 83.5
3240 130.06
3720 148.42
4320 165.64
4880 191.22
5280 194.86

TurbousMaximus
04-17-2007, 03:27 PM
Thanks Mike you have been a ton of help. Modified, when i was running the original k03 file from GIAC on the k04+4 bar, everything was running fine. Its only with this flashed version of k05.

They put on the race program, if i had 100 octane close by i would try it out.

The 5 bar i bought was used for a bit, but i dont think its bad, how can i check?

ModifiedA4
04-17-2007, 03:30 PM
Same ecu(just flashed by AWE) as he was running with the K03. When he runs the "stock" flash program the car runs just fine. Problem only seems to be with the "K05" flash and at part throttle.

Only code he gets is for his post cat 02 sensor and now a CEL for the part throttle fuel trim being too high. He has done plenty of tba's and the problem is still there.


BTW he is hitting 194.86 g/s @ 5440 rpm with the K05 file. But since he lifts at that point it should hit a bit higher by 6500.

2600 62.25
3000 111.83
3600 134.22
3840 40.33
4080 118.44
4320 113.53
4720 176.86
5120 192.25
5440 194.86

Another log of his

2720 83.5
3240 130.06
3720 148.42
4320 165.64
4880 191.22
5280 194.86

you're sure his N75 isnt hooked up backwards? maybe they flashed the wrong program. that sounds like the only plausible explaination. he should hold AWE to reflash for free.

TurbousMaximus
04-17-2007, 03:34 PM
my n75 is the K valve, and i have it hooked up long nipple into the intake side.

yah maybe they did flash the wrong software, they better do it for free theres no reason i should pay.

ModifiedA4
04-17-2007, 03:41 PM
my n75 is the K valve, and i have it hooked up long nipple into the intake side.

yah maybe they did flash the wrong software, they better do it for free theres no reason i should pay.


dude. when trouble shooting, always use the stock part if possible. put the stock N75 in.

a quick google search on the "K" valve yielded this:


hit limp mode with the N75K today on the highway. strike one.

mike-2ptzero
04-17-2007, 03:41 PM
you're sure his N75 isnt hooked up backwards? maybe they flashed the wrong program. that sounds like the only plausible explaination. he should hold AWE to reflash for free.

If I remember he sent me a log of block 115 and it all looked good so I dont think the N75 is the issue.

Was thinking maybe the Maf was reading higher then it really should causing the part throttle fuel trim to be so rich, but then his Idle and WOT is perfect so that cant be the problem either.

ModifiedA4
04-17-2007, 03:49 PM
If I remember he sent me a log of block 115 and it all looked good so I dont think the N75 is the issue.

Was thinking maybe the Maf was reading higher then it really should causing the part throttle fuel trim to be so rich, but then his Idle and WOT is perfect so that cant be the problem either.

part throttle is when the N75 can affect drivability most. at idle its full open. at WOT its full closed. at part throttle the ECU needs to be able to dither it in small increments and the valve has to behave within the programming tolerances of the ECU. a part throttle 115 log probably shows the two curves far apart and very wavy.

btw, the "K" valve is from the Audi RS2 among others and is reported to be as aggressive as the "H" race valve.

here's the WOT log of a K05+5bar with stock N75:
http://www.modifieda4.com/images/ecu-logs/010907_block_115117_6_58_caps.png

TurbousMaximus
04-17-2007, 03:58 PM
im sorry excuse me, i said K valve when i meant F. This is the one that supersedes the stock C which i no longer have.

mike-2ptzero
04-17-2007, 04:01 PM
No limp issue with his car and the throttle never closes because of over boost. He could try the stock N75 valve if he hasn't already, but dont think its going to fix the issue he is having.

ModifiedA4
04-17-2007, 05:09 PM
im sorry excuse me, i said K valve when i meant F. This is the one that supersedes the stock C which i no longer have.

damn, i thought this one was going to be easy :)

TurbousMaximus
04-17-2007, 07:58 PM
yah it's never that easy. i found a place locally that sells race fuel, ill be trying the race program to see if anything changes.

Poopie
04-17-2007, 10:44 PM
you can get race fuel at montgomeryville cycle center.

Flossin
04-25-2008, 10:43 PM
any update on this?