Need HELP! with emissions for re-test Thursday

[b5passat99]

Ive got the MOT re-test thursday afternoon.

Its now failed twice on emissions

Bit of history 1st.

Bought the car off a friend, it hadnt been used for about 8 months, it woz only 3months after the MOT, when it got parked up. About £600 was put into passing it.
It had to be kept at work, but it needed to moved out of the way daily, it woz started & drove bout 20-30 yards or so each day, the battery regularily needing a charge to start.
I picked the car up drove it home, it woz running a bit rough, not surprised after the lack of use. took it for an MOT see whats what.
Emissions, CV boot an tyre valve trapped by the hub cap, with an advisory about exhaust - so no probz there then lol

Emissions Test:
==========================
Natural Idle Test:

RPM: --- not checked
CO % vol: --- Max value-0.500, actual-0.613 - fail

Fast Idle Test:

RPM: --- not checked
CO %vol: --- max value-0.300, actual-0.008 - pass
HC ppm vol: --- max value-200, actual-6 - pass
Lambda: --- min value-0.970 max value-1030, actual-1.007 - pass

Second Fast Idle Test: - not checked
============================

Bought new sparks, air filter, full exhaust system.
replaced CV boot with universal stick together type, an sorted tyre valve.

Back to MOT centre - Failed on brakes, exhaust, CV boot an emissions ***?? I woz not a happy bunny

Ive posted about the brakes prob, parts arriving 2morow

The exhaust bolts between, Cat. Conv & downpipe had loosened a bit, or i hadnt done the job properly in the 1st place lol

The emissions results were different to last time
=========================================
Natural Idle Test:

RPM 1/min: --- min limit - 710, max limit - 1010, actual value - 881 - pass
CO %vol: --- max limit is 0.500, actual value - 0.491 - pass

Fast Idle Test:

RPM 1/min: --- min-2450, Max-3050 Actual-2734 - pass
CO %vol: --- max-0.300, actual-0.620 - fail
HC ppm vol: --- max-200, actual-110 - pass
Lambda: --- min-0.970, max-1.030, actual-1.140 - fail

Second Fast Idle Test:

RPM 1/min: --- min-2450, max-3050 Actual-2708 - pass
CO %vol: --- max-0.300, actual-0.661 - fail
HC ppm vol: --- max-200, actual-133 - pass
Lambda: --- min-0.970, max-1.030, actual-1.121 - fail

Oil Temp deg C: --- min-80, actual-87 - pass
============================================

Bought a VAG-COM, trial version 409.1, got errors
=======
00520 - Air Mass / Air Flow Sensor (G70)/(G19)
31-10 - Open or Short to Ground - Intermittent
00523 - Intake Air Temp Sensor (G42)
30-10 - Open or Short to B+ - Intermittent
=======

Have been told that, the MAF error can come up if the car hasnt been used, and the battery has been removed, which is has.
The solution is to run it a few times, should clear the error,
but it could be a genuine error, i dont want to throw £103 (cheapest i can find) at it, if its not the prob,
nor do I wanna throw £69 (cheapest ....) into a lambda sensor, if thats not at fault, could the Lambda reading have been caused by the cat & pipe not being mated properly ??
Any help would be gratefully received, like I said re-test thurs :S

[VAG.Direct]

Hi ya mate where you from cos i can do diagnostics on VW,AUDI,SKODA,SEAT...!!!!!

And reset any error codes it is produceing...!!!!!

Plus i also do mileage correction...!!!!


Checkout my webpage which has contact details on:- Removed as per forum rules!

[b5passat99]

[quote=VAG.Direct;128452]Hi ya mate where you from cos i can do diagnostics on VW,AUDI,SKODA,SEAT...!!!!!

And reset any error codes it is produceing...!!!!!

Plus i also do mileage correction...!!!!


Checkout my webpage which has contact details on:-

Hiya mate
thanx 4 responce,

im about 90 miles south from donny

Wot is mileage correction? soz if that soundz thick lol

[b5passat99]

So has any1 got any ideas to
whats causing these readings?
What do i do next?
Ive had to cancel the re-test

Ive removed the piping between air filter and throttle, does my throttle need to be adapted thru the ecu ??

Cud it be anythin else? that'll make it run rich?

[Stevebt]

Hi
I am sure I have read on this forum somewhere that, the ECU adapts to the ruuning conditions, so if it has only been used for short journeys or just idleing the ecu has adapted the mixture!

Could just be coked up, I would suggest a good blast down a bypass if it was legal.

[stuart]

Please read ALL the forum rules regarding promotion of Companies before posting links. Only OFFICIAL sponsors/banner advertisers are allowed to advertise.

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[b5passat99]

Hiya steve
Thanx 4 ya responce

I have to confess it has been drivin down the back lanes :S for testing only!! ive driven about 60miles testing over the last few weeks, that hasnt cleared it

[Eddie]

Go and invest £8.00 in a can of forte diesel treatment and a new fuel filter pour the forte into the new filter fit the filter then blast ur way down to the mot centre it will pass the emission test

[b5passat99]

Go and invest £8.00 in a can of forte diesel treatment and a new fuel filter pour the forte into the new filter fit the filter then blast ur way down to the mot centre it will pass the emission test

Hiya Eddie
Thanx 4 ya responce, i like it lol
is there a version for petrol ?