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Old 07-12-2006, 01:20 PM   #1
KILLARMY
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Default STI Version Six running rich in gas

Hi, I have a problem on my STI version 6 that i've just finished to swap by myself. I did electrical and mecanical swap alone so every suggestion will be appreciated.

Ok, now I have a Version 6 engine with a Garrett GT-10 turbocharger. Everthing on the exhaust line and on the air intake has been changed. At idle, the car is running ok, not perfectly but we can see that it carbonises a lot. When I open the throttle, we can see a lot of carbonised gas (dark black smoke).

When I took a ride, I did a pull and got 5 PSI at 4500 RPM and it stopped here (very slow spool up and very low boost because i'm supposed to get at least 16 PSI and it think a version 6 ecu is originaly set at 18.5 PSI)

So, no CEL, no knock, under 3000 RPM everythink looks normal except the carbonised gas and the very high fuel consumption. I have no exhaust leaks.

What I think it could be is, a bad cam shaft timing, defect MAP sensor, defect colant temp sensor or a defect air intake temp sensor. The MAF is brand new!!

If someone could help me on that problem I would appreciate very much!!!

Thank you

Killarmy
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Last edited by KILLARMY; 07-13-2006 at 01:10 PM.
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Old 07-12-2006, 02:43 PM   #2
Jaxx
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soooo what engien management are you using
why would you be able to make a change as large as a new turbo w/o EM
i have no idea what a gt-10 is
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Old 07-13-2006, 12:56 AM   #3
Scoobie Steve
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Subaru L Ver 6 STi Type R

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Ver 6 MAF tube with 99 RS MAF sensor?? Ver 6 ECU? Did the car ever run correct since the swap? CEL is not working since you are in limp mode.
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Old 07-13-2006, 03:49 AM   #4
KILLARMY
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Now, I have no EM but I will get an Ecutek in the future. I have a version 6 ECU. My car never run correct since the swap, always the same trouble, no change and approximatly 50 miles done. This is a version 6 tube with a rs 99 MAF.

Could you explain me what is limp mode??

My CEL is working because at the beginning I had 5 CEL that I finally troubleshooted and I eliminated all of them!!

Thank you for your help

Killarmy
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Old 07-13-2006, 03:51 AM   #5
KILLARMY
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A Garret GT-10 is a little bit bigger than a VF22, its ball bearing with
big turbine housing!! Can hold 375 WHP easily.
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Old 07-13-2006, 09:13 PM   #6
sube151
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00 Grp N Wrx STi,
+99 V6 STi,

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Wow. Your asking for trouble without the EM. Version 6 ecu wasnt set for the turbo you are using. Do you still have the original turbo? Your chances of getting ecutek to work on your version 6 ecu are slim. Reflashes rarely work. You'll need apex powerfc or other EM.

RS99 MAF will also cause the ecu to run rich. RS tube is much smaller in diameter in than version 6. MUCH smaller. You need to order the correct maf for version 6. Do you have the part #?
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Old 07-13-2006, 10:29 PM   #7
Scoobie Steve
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The turbo his is running is not the trouble! The 99 RS MAF sensor is fine with the stock Ver 6 MAF tube.....sensor is exact same part number!
I ran no EM with my VF22 without trouble...your gt10 wont be a problem either.

If the car is cutting out at 4500 rpms its in limp mode most likely due to speed sensor, but this isnt your rich trouble. Check for leaks after the MAF, the intercooler and bov are suspect. MAP sensor on the Ver 6 is only used for boost control and fuel cut, it runs fine with this not connected.
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Old 07-14-2006, 01:36 PM   #8
KILLARMY
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Why Ecutek isnt a good choice, I hear about it makes a good reflash for a version 6 ECU...

Maybe I could help you if I tell that when the car is running at idle, we can see that its running rich, so that means that at idle, the mix is already not OK...

I dont think a garret GT-10 absolutly needs to get an EM because its a little bit bigger than the vf 22 so I should read higher boost than that for sure at least!!!

Killarmy
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Old 07-14-2006, 02:10 PM   #9
Jaxx
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Quote:
I dont think a garret GT-10 absolutly needs to get an EM because its a little bit bigger than the vf 22 so I should read higher boost than that for sure at least!!!
the amount of boost is not the factor at all ... and yes it absoultly needs EM

a ver 6 ecu is a differnt model/manufacture than the later ver 7+ the only place in north america that can reflash it is lachutte.. suposedly only 50% work the other 50% become bricks
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Old 07-14-2006, 02:49 PM   #10
sube151
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+99 V6 STi,

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Quote:
Originally Posted by Scoobie Steve
The turbo his is running is not the trouble! The 99 RS MAF sensor is fine with the stock Ver 6 MAF tube.....sensor is exact same part number!
I ran no EM with my VF22 without trouble...your gt10 wont be a problem either.

If the car is cutting out at 4500 rpms its in limp mode most likely due to speed sensor, but this isnt your rich trouble. Check for leaks after the MAF, the intercooler and bov are suspect. MAP sensor on the Ver 6 is only used for boost control and fuel cut, it runs fine with this not connected.
Not true. 99RS MAF and version 6 MAF sensor are different part #'s. Last two digits of V6 are 20 and RS is 00. They look the same, but calibrated for different diameter tubes. I dont think this is his root problem, but certainly will affect afr's a bit.

How are your plugs, coil pack, and wires? Are your injectors firing properly. What were your other codes you had?

The flash99 ecutek code is highly unstable. You have a chance of getting it to work correctly, but also a good chance of cooking it. Seriously, invest into powerfc or at least get a SAFCII. SAFCII sort of sucks, but provides some safety.
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Old 07-14-2006, 07:59 PM   #11
Scoobie Steve
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Subaru L Ver 6 STi Type R

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The Ver 5/6 MAF part number is 22794AA010. That number was on my MAF sensor right from Japan. The updated 99 RS MAF number is 22794AA000. IIRC the old 99 RS MAF number was the same as the Ver 5/6. The 00 MAF is just an updated MAF no difference in calibration. I ran the 00 MAF in my car with no EM and went 11.87 so the air fuel ratio isnt off.

As for KILLARMY's trouble I dont have an answer, I would recommend getting a delta dash and looking at all the sensor voltages.
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Old 07-17-2006, 12:59 PM   #12
KILLARMY
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Anyone has an idea??

And I forgot, I always put octane 94 in my fuel tank!!!
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Old 07-17-2006, 07:01 PM   #13
KILLARMY
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Couldnt it be blocked injector or simply my coil pack???
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Old 07-17-2006, 11:19 PM   #14
Scoobie Steve
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Subaru L Ver 6 STi Type R

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Quote:
Originally Posted by KILLARMY
Couldnt it be blocked injector or simply my coil pack???
no and no. Some things that might cause a rich condition are very high fuel pressures or an incorrect MAF voltage. O2 only works at light load so its not that. MAP does nothing so its not that, Air temp sensor and coolant temp sensor are easy to check, just measure voltage. Also you need to find why its not boosting, the problem could be there.
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Old 07-19-2006, 04:12 AM   #15
chico_kj_23
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check for a intercooler piping leak, when i poped the i/c piping on my skyline it did a very similar thing. no power, runs like ass, and dosnt sound good.
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