PhilW's Mk3 Ibiza Project Thread - 3071 - Now Breaking!

[PhilW]

Thanks Bill.

I got a question.


Fuel trim is at ~17% if i take out -10% on Primary will the ecu try and re-adpat that out? So effectively adjust by up to 27% as it thinks the MAF is under reading like Wilko says by 10%

 

[ibizacupra]

I'm not so sure it will given the ibiza's narrow band and only runs lambda adjust on cruise and idle throttles. wilkos ecu is wideband and has request and actual lambda values against which lambda is always adjusting.

If you take out 10% on primary, I think the trim will adjust to the remaining 7, as the adjustment so far as I know is just the cruise/idle modes. fueling under boost and load is dealt with in the map itself..

 

[gavbey]

i wish this was my cupra, uve done alot of quality work mate, keep it up

 

[PhilW]

I'm not so sure it will given the ibiza's narrow band and only runs lambda adjust on cruise and idle throttles. wilkos ecu is wideband and has request and actual lambda values against which lambda is always adjusting.

If you take out 10% on primary, I think the trim will adjust to the remaining 7, as the adjustment so far as I know is just the cruise/idle modes. fueling under boost and load is dealt with in the map itself..

Do you think that all fuelling via lemmiwnks is null and void on narrowband?

So fuelling is dealt with primarliy via MAF values? Would this suggest me being a numpty and dropping my MAF could have damaged the sensor? As its adding in fuelling as my sensor is reading low?

Sorry for all the questions, just trying to learn about it all further.

 

[ibizacupra]

no adjustments work, I used them on my ibiza.. it will adjust the whole fueling down.. when you tell it to.. the lambda adjustment itself being narrow band is the difference on the ibizas ecu, in the way it has'nt got request and actual lambda values, and a wideband to achieve it.
MAF is a lot more relevant on the ibiza, but the tables for load etc are more the drivers for what fueling goes on. the later ecu's you have more latitude for it to self tune to the lambda value you set.. easier on later ones.. Early ones are fairly retarded in comparison and a lot more work to get right because of this self tune limitation.

your maf reads does'nt it.. so its not dead, which is what I would expect from a dropped sensor. the fact its working to me is a good sign of it probably being ok.

you will need to watch your wideband like a hawk and compare with loads etc, which is where craig and his dyno will be very usefull to you.

 

[PhilW]

yeah i knew block 031 itself is usless on WOT on narrowband but didnt understand the relevance of the fuel tweaks on lemmiwinks and whether or not it would work.

The small amount ive used lemmiwinks to adjust fuelling hasnt been that successfull but this was on a car (cupra matts old 2871) that wasnt running 100% to start with.

You're right, Craigs dyno is the way to go where i dont have to drive whilst looking at my wideband gauge, im only running 1.4ish bar peak and it scares the crap out of me.

I'll have a play and see what i can do.

 

[PhilW]

AFR vid, not filmed by me btw! 3rd gear.





Interesting thread regarding lean/rich/timing advance/retard vs spool up times.

 

[gazcuprablk]

mine was doing the same when i was on my way to meet you phil when you logged my car exactly the same sort of digits was on 12.7-9 on idle and went to 10.9 then worked itself out! glad you got her running again m8 think the passenger ride in mine was enough to kick your ass into gear haha

you still after a aeb head? my m8 has 1 but wants to shift the bottom end with it so complete engine if you dont want ill have it lol

 

[ibizacupra]

i cant make out the revs it starts to pull but the sound seems like is into the 12's before its got going and then drops off scale into the 10's. is that how it is? difficult to makle that out from the vid

 

[PhilW]

It's about 3000rpm, maybe a bit less.

But yeah that's what happening.

 

[barnsley]

Thanks Bill. Appreciate that a lot.

Alex gets his about 4000, maybe a bit less.

gt3071,t25,0.86a/r, 2ltr 20v : 4300 ish

gt3071-compact-48trim, 0.63a/r,T25: 4250 ish Tuftys? No wonder hes re-doing is cooler. lol

polo, t3t04e-57trim,0.62a/r : probably about 4000.

And mine: Between 4500-4700.


Now this might be to do with richness on spool, large fmic core and maybe small boost leak.

Are any of them on tubular manifolds like mine? Loggers should spool quicker i would have thought.


Need to check for leaks, adjust the fuelling and raise the boost and see what my logs look like from there.

If i can get it down 300-500rpm id be pretty happy.

i can confirm 4000 on the polo phil

 

[PhilW]

i can confirm 4000 on the polo phil

Thanks for that mate, appreciate you chipping in.


So i took 10% out on thje primary fuelling and fuelling wise at WOT is much better, mid 11's tapering down to 10.9 at redline, not bad. Soooooo much quicker as well, spool dropped a little bit as well as its leaner on spool.

But.

Fuel trims dropped to -24.8 or whatever the lowest adaption limit is and i got a lean code as a result.

So im going to reset the fuel adaptions and try an S3 MAF housing to see what difference that makes.

 

[PhilW]

Driven the car quite a bit as it is this week, noticing a few things, idle bounces quite often and almost stalls and also stalls when im coming to a slow stop now and again.

Boost gauge is reading -11in/Hg which also seems low so this to me is pointing towards a boost/vac leak somewhere.

My list of things "to do" is gettin larger the more i drive the car as well. lol.

 

[Robbie C]

Stick with it mate, so close now in relation to how far you've come with it. Any progress over the weekend?

 

[wild willy]

Pressure test it Phil, unstable idle is a strong indication of a boost leak.

 

[PhilW]

Thanks all, i just need some time to work on it thats all! lol.

 

[Forbez]

Gotta say Phil, as always mate, The car looked and sounded awesome! I'll take you up on a passenger ride aswell. You've put so much time and effort into the car, whilst always helping others out. (me more than most probably) and I must thank you.

 

[PhilW]

Gotta say Phil, as always mate, The car looked and sounded awesome! I'll take you up on a passenger ride aswell. You've put so much time and effort into the car, whilst always helping others out. (me more than most probably) and I must thank you.

Cheers Tom.

Did you hear it going up the road then?

 

[PhilW]

Cars all insured for another year. All mods and power declared with Greenlight, £580. Quite happy with that to be honest.

 

[Robbie C]

Nice one Phil, almost identical price to mine renewed with Greenlight last week. Can't fault them.