MAF - MOT advice

RoverRobson · 13th April 2017, 18:49

My MOT is due Saturday but I've got my MAF unplugged because I need a new one. I've yet to order one.

Will this effect the emissions test on the MOT and will I therefore fail?

Didn't want to plug it back in just for the MOT but may have to. It's just awfully slow.

Cheers
Robson

mh007 · 13th April 2017, 18:55

No, it won't fail the emissions because the MAF is disconnected.
Just tuck the connector plug out of the way.
I have a few customers that have been driving around with disconnected MAF's for years now (their choice not to replace) & they fly through the emissions test at MOT time.

freck · 13th April 2017, 18:55

Last years MOT on my tourer had no advisories with my MAF unplugged.
This year I'd just fitted a new MAF so certainly no advisories this time.

wullie480 · 13th April 2017, 19:00

Diesels don't get an emissions test at MOT it's a smoke test.

It'll pass with it unplugged it won't cashes an issue unless its smokey.

RoverRobson · 13th April 2017, 19:19

Thanks guys! Appreciated!

Sent from my iPhone using Tapatalk

mh007 · 13th April 2017, 19:43

Yes, apologies about that - A smoke test it is.
Saying emissions is a just force of habit!

Mike Noc · 13th April 2017, 22:18

It is an emissions test, just a different type of emissions test from the petrol engines - checking the opacity of the emissions as opposed to analysing them.

13th April 2017, 18:49	#1
RoverRobson Gets stuck in MG ZT-T Join Date: Feb 2010 Location: County Durham Posts: 887 Thanks: 307 Thanked 262 Times in 150 Posts	MAF - MOT advice My MOT is due Saturday but I've got my MAF unplugged because I need a new one. I've yet to order one. Will this effect the emissions test on the MOT and will I therefore fail? Didn't want to plug it back in just for the MOT but may have to. It's just awfully slow. Cheers Robson __________________ Kind regards, Robson MG ZT-T SE Sports Auto 2.5 V6 180 Monogram Twilight - 1 of 1 Built "The Purple One"

13th April 2017, 18:55	#3
freck Posted a thing or two Rover 75 CDT Connie Tourer Join Date: Oct 2015 Location: Preston Posts: 1,051 Thanks: 142 Thanked 274 Times in 226 Posts	Last years MOT on my tourer had no advisories with my MAF unplugged. This year I'd just fitted a new MAF so certainly no advisories this time. __________________ Steve Teamwork makes the dream work! Mods planned - Cruise retrofit - Done, ZT front bumper - Done, 160 remap - Done...and probably one or two more This vehicle was the 15,751st 75 Tourer to run off the production line, out of 27,407 This vehicle was the 3,726th 75 Tourer CDT Connoisseur to be made out of 4,100 This vehicle was the 732nd 75 Tourer in Starlight Silver (code: MBB) to be made out of 4,100 Starlight Silver 75 Tourers

13th April 2017, 19:00	#4
wullie480 This is my second home 1 Join Date: Dec 2010 Location: Banned Posts: 5,195 Thanks: 528 Thanked 1,022 Times in 786 Posts	Diesels don't get an emissions test at MOT it's a smoke test. It'll pass with it unplugged it won't cashes an issue unless its smokey. __________________ [SIGPIC][/SIGPIC]

13th April 2017, 19:19	#5
RoverRobson Gets stuck in MG ZT-T Join Date: Feb 2010 Location: County Durham Posts: 887 Thanks: 307 Thanked 262 Times in 150 Posts	Thanks guys! Appreciated! Sent from my iPhone using Tapatalk __________________ Kind regards, Robson MG ZT-T SE Sports Auto 2.5 V6 180 Monogram Twilight - 1 of 1 Built "The Purple One"

13th April 2017, 18:55	#2
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	No, it won't fail the emissions because the MAF is disconnected. Just tuck the connector plug out of the way. I have a few customers that have been driving around with disconnected MAF's for years now (their choice not to replace) & they fly through the emissions test at MOT time.

13th April 2017, 19:43	#6
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	Yes, apologies about that - A smoke test it is. Saying emissions is a just force of habit!

13th April 2017, 22:18	#7
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,551 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	It is an emissions test, just a different type of emissions test from the petrol engines - checking the opacity of the emissions as opposed to analysing them.