Self mapping/ MAF bust?

[ThackersLCR]

Afternoon folks.

After fitting a new green cotton pannel filter, smothing the air box, putting an 80mm air feed and new forge 007p on my LCR, i gently broke it in for a few days.

When i finally put my foot down, i only had abit of boost, so Im thinking air leak somewhere. checked but to no avail. I knew it would take some time to re-map itself but three weeks later? i can finally hear it dumping slighly and turbo quetly whistling, back to normal!

The third week, i also put a TIP on, tight jubilee clips and well on the turbo.
the next day I travelled around 230 motorway miles and it was back to the slow self mapping stage, as i had unplugged my MAF. nice and slow.

I have been told different things by different people as to the duration of self-mapping. the guy i bought the stuff off saying 50 miles and another vw man saying ten days.

Im also overfulling massivly.

Anyone point me in the right direction before Big wads are spent?
Cheers People

 

[D.K]

When you smoothed the airbox did you take out the funnel in the top half of the airbox???
Someone I know did this and it killed the MAF

 

[ThackersLCR]

No, i removed the plastic lines on the inside of the top and bottom halves of the box.

I know theyre abit fragile, so extra care on the top half.

Would Vag-com tell me if my MAF was out.
Is there any way of telling that its operating correctly or even operating?
I thought unplugging it but Im not up for that to be honest.

 

[D.K]

You can unplug the MAF to see if runs any diffrently.
VAG COM will till if you have any errors normally a dead MAF will put up an error code.

Norrmally it should ony take 3 or 4 cold starts for the ECU to learn something new.

 

[ThackersLCR]

asin leave it idling or just go round the block sort of thing?

How much are we talking if its brokened?

Thanks for the help!

 

[D.K]

Unplug it and take it round the block if itt runs the same then it's probley the MAF.
Might be worth geting it VAG COM'd aswell

 

[LEE69]

Maf is about £60 exchange iirc.

Don't drive far as the mixture will be all over the place and neat fuel is bad for the cat.

 

[stpete]

Try a throttle realign? this will also put ecu back to std so it can relearn with new bits fitted ie re-adapt! Do a search for details cos off the top of my head cant remember proper sequence but iirc remove batt negative leave for ten mins, reconnect and put key into ign turn till lights on dash but dont start, wait till noises from throttle stops or five ish mins? This should clear any adaptions and reset throttle so your starting with a clean sheet and mods should be seen and accounted for by ecu!!

 

[traumapat]

Unplug it and take it round the block if itt runs the same then it's probley the MAF.
Might be worth geting it VAG COM'd aswell

i think you mean if it runs better without the maf its faulty... if it runs the same its possibly something else.

 

[traumapat]

I thought unplugging it but Im not up for that to be honest.

why are you against unplugging the maf? only do it the once to see if the car runs better... then put it back. you dont actually remove the maf... just unplug the electrical connector.

 

[D.K]

i think you mean if it runs better without the maf its faulty... if it runs the same its possibly something else.

Yeah thats what i ment

 

[ThackersLCR]

Right, I unplugged the MAF prior to a little run round the block.
I stuck my head round the back when started to watch a steady flow of thin black smoke emerge from my zorst for about 10 seconds then it turned white, not normal??? the ESP light was on and couldnt turn it off.

Once out of the drive, i let the turbo come in then changed, the dump was louder than normal. I gave it some more and the turbo was whistling rather than sucking. i was still down on power though. I also didnt have the strong whiff of unburnt petrol at the rear end.

Once plugged back in, i did the same but was still down on power. and the ESP disappeared.

I have now disconnected the negative on the battery and will report my findings later.

Fingers crossed.

 

[ibizacupra]

goosed MAF..
if you have access to vagcom then do a power run in 2nd gear to high rpm and report the g/s readings from block 003 you are getting. (log 115 also for request vs actual boost, and 032 for fueling)

good luck