MS2 and power issue.

Hi everyone!

I have a ms2 3.0 installed on my Mk3 Golf Gti...and i have some problems in these days.
It started with idling problems and now i'm also having power lack problems from 4500 rpms to 6000rpms at full throttle, after 6200rpms starts pushing hard again until 7200rpm..it seems a Vtec engine
I dont think that the tune has changed by himself but i'm not that expert... Could it be an hardware problem?
I have a log file, this is 3rd gear from 2000rpms to rev limiter.
http://www.mediafire.com/?3iw97a2xmmwmmux

Thank you for your interest and sorry for my poor english!

 

Perform a data log of a typical pull and send a link to the data.

 

The log i provided is not good?

 

It seems like the fuelling spikes lean at around 4.2k -4.5k. You seem to have closed loop fuel control on as gego is trying to ramp back the fuel at this point. You may want to turn it off after a certain map value and adjust fueling from there again. If Gego is anything to go by. It looks like it could be overfuelling, as AFR on my MLV is not right.

Are you using a wideband ? it seems to be stuck at 12.1 or is that a narrowband?

 

I have a Tech Edge wideband...

The fueling map used to be perfect before this issue, maybe the wideband is faulty? Do you want me to attach the .msq file?

 

Can you email your msq please. As the log is useless without the cal.

 

http://www.mediafire.com/file/jawzznv8ca5baow/Golf Mondello.msq

 

Cheers.

 

Cant seem to see wideband working on that log. Just goes from 12.1AFR to 14.6AFR at a couple of points. May need to turn ego control to be active below alower value than 108kpa for now. And your fuelling cant be that dialled in if you have to have the conroller authority at 50.

 

I'll check trying to understand...

Could u please explain what do you mean with your last sentence? My english is little rusty..

 

To "dial in" is an expression sometimes used to mean "tune", "calibrate", "set up", "configure".

So, tshirt2k is saying that a GEGO authority of 50 is a high number, which means that your fuel table (VE map) requires further tuning.

 

So it means that the ego control is turned off, but however is setted on a value too high?
First step is turn Ego control on and second step to check if the fuel map is ok?

But why the car use to perform proper?

 

Your Ego control looks to be on. Your ego control is compensating for a not so good map. But you may have problem with your sonda lambda. The numbers on your VE table look very large too, meaning your req_fuel isnt right.

 

Ok, so the money i've paid for the tuning are wasted....nice
Cannot understand what happened....

 

Do You have a laptop? Can you see the wideband reading in megatune/tunerstudio? Tuning must be very expensive in italy?

 

Yes i have and i have and i have an afmeter too..
You can see it moving in this video, here the tuning was fine
http://www.youtube.com/watch?v=yLRP_sgVjcA&feature=player_profilepage#t=143s

In italy everything about racing is expensive, a good map starts from 400€. Mine has been made by a well known Fia Gt race engineer and has taken a whole day on track... first time for him on MS but i hoped i was safe

 

Whats the spec of this engine?

it is a 2.0L 16V ABF yes?

To begin I would get rid of rows 1,3,6,10 kPa and distribute them to have finer control over wide open throttle fueling

have 85, 90, 95, 100, 105 rows, as according to your log, your kPa MAP reading goes up to 107 at one point, yet your table only goes up to 100 kPa

Doesn't look like Mr. FIA GT did the best job

 

I agree about the kpa values, and i hope we both are wrong about Mr Fia Gt, but i assure you the car was perfect few track days ago..

 

Maybe, but the table doesn't look like it's finished. If the AFR's could be seen in the log. It would be easier to tell what's going on.

 

I'll check, maybe there's a leak in the exhaust line or on the wideband bung.