need advoce maf sensor

Discuss, ask, or get help with engine and mechanical queries in here.

Moderator: Moderators

johntl
2.0 16v
Posts: 137
Joined: Fri Sep 24, 2010 7:38 pm
Location: cleveland , england

Re: need advoce maf sensor

Post by johntl » Fri Jan 18, 2019 5:59 pm

You said it was it was a right pig of a job , you were right !!!!!

But got it done ,but does not seem much difference still flat up to 1500 revs, also it has started needing sometimes turning over twice to start, which it has never needed in the 8 yrs I have had it ??

johntl
2.0 16v
Posts: 137
Joined: Fri Sep 24, 2010 7:38 pm
Location: cleveland , england

Re: need advoce maf sensor

Post by johntl » Sat Feb 16, 2019 4:47 pm

Just got the car through its Mot, and got oil changed and oil/air/fuel filters changed and the initial pickup with the car seems improved.
recon the air filter must have must have been really clogged

exec406
2.0 16v
Posts: 132
Joined: Thu Jan 24, 2008 8:52 pm

Re: need advice maf sensor

Post by exec406 » Mon Mar 25, 2019 7:51 pm

Having a look at replacing the MAF on my car, however it's been a while since I've disconnected the MAF electrical plug from the MAF sensor, and it's not coming off that easy.

Just to confirm is it the two tabs in the lower centre of this pic to press down (screwdriver etc) then is it a separate housing onto the MAF from the electrical plug or is it all one piece?

Thanks

MAF1.jpg
Last edited by exec406 on Mon Mar 25, 2019 8:00 pm, edited 2 times in total.
2003, '03' 406 Executive 2.2hdi 136.

GingerMagic
3.0 24v
Posts: 3150
Joined: Fri Apr 06, 2012 9:02 pm
Location: Bournemouth

Re: need advoce maf sensor

Post by GingerMagic » Mon Mar 25, 2019 7:54 pm

I don't think so ( it's been a while... )
I think it's a lift up tab in the middle on the underside of the connector - guess that makes it a pull down tab...
It can be stiff, sometimes a little leverage with a baby screwdriver helps.
1999 T4 family wagon
2005 Vauxhall Meriva
1998 406 V6 Coupe - Midlife crisis..!
PP2000 user, can help with faults / diagnostics in the Bournemouth area.

exec406
2.0 16v
Posts: 132
Joined: Thu Jan 24, 2008 8:52 pm

Re: need advice maf sensor

Post by exec406 » Mon Mar 25, 2019 8:05 pm

OK thanks, I did have a look there - wasn't particularly obvious at first look.
MAF.jpg
Think I can see it now - almost in line with the upside down no. 4?
2003, '03' 406 Executive 2.2hdi 136.

GingerMagic
3.0 24v
Posts: 3150
Joined: Fri Apr 06, 2012 9:02 pm
Location: Bournemouth

Re: need advoce maf sensor

Post by GingerMagic » Mon Mar 25, 2019 8:23 pm

Bingo.
It will become obvious when it's removed 8)
1999 T4 family wagon
2005 Vauxhall Meriva
1998 406 V6 Coupe - Midlife crisis..!
PP2000 user, can help with faults / diagnostics in the Bournemouth area.

dirtydirtydiesel
3.0 24v
Posts: 1358
Joined: Sun Apr 28, 2013 11:02 pm
Location: Coalville, Leics.

Re: need advoce maf sensor

Post by dirtydirtydiesel » Tue Mar 26, 2019 12:21 am

Yes,
As Ginger say's the only thing I will add is to be very careful using a screwdriver,
I have found if you push / press the M.A.F connector into the socket of the M.A.F at the same time as
pulling downwards on the inner plastic tab you have shown in your last pic it should come away quite easily.
2002 110 HDi estate, Rapier in monaco blue! ( found quite a bit more power :cheesy: )
1999 3.0 V6 SE coupe in Diablo Red ( my baby )
2006 206 1.4 16v sport in Aegean blue ( wife's shopping trolley :roll: )

pp2000 owner / user, can offer Diagnostic's / fault code, reading / clearing for beer tokens in Leicestershire.

User avatar
Doggy
Mod with a 2.2 HDi, De-Fapped!
Posts: 10152
Joined: Mon Oct 13, 2008 11:49 pm
Location: Northants

Re: need advoce maf sensor

Post by Doggy » Tue Mar 26, 2019 1:43 pm

I can usually reach around the connector and pull the tab downwards from the rear of the plug with the tip of a finger. As GM says, it's dead easy once you've done it once.
2002 HDi 2.2 Exec Estate, (2008-12)
2003 HDi 2.2 6-speed Exec Estate (2012-19)
2009 Citroen C5 2.0 HDi VTR+ Estate

exec406
2.0 16v
Posts: 132
Joined: Thu Jan 24, 2008 8:52 pm

Re: need advoce maf sensor

Post by exec406 » Tue Mar 26, 2019 7:46 pm

Thanks for the info. Looks like it will be one of those tiny screwdrivers required then, as the tab wouldn't budge.
2003, '03' 406 Executive 2.2hdi 136.

exec406
2.0 16v
Posts: 132
Joined: Thu Jan 24, 2008 8:52 pm

Re: need advoce maf sensor

Post by exec406 » Thu Mar 28, 2019 7:53 pm

Hi

Just to clarify, is the tab to push down the one I've circled in yellow? (Doesn't seem to be budging that much with a mini screwdriver) Also, does the entire grey plug come off? (i.e. one piece unit?)
MAF3.jpg
Thanks
2003, '03' 406 Executive 2.2hdi 136.

GingerMagic
3.0 24v
Posts: 3150
Joined: Fri Apr 06, 2012 9:02 pm
Location: Bournemouth

Re: need advoce maf sensor

Post by GingerMagic » Thu Mar 28, 2019 10:06 pm

Have a closer look at your picture.
Underneath you can see a long black part that goes through the loop - it's the end of this tab that you need to pull down at the tip and pull out only the grey part...
1999 T4 family wagon
2005 Vauxhall Meriva
1998 406 V6 Coupe - Midlife crisis..!
PP2000 user, can help with faults / diagnostics in the Bournemouth area.

dirtydirtydiesel
3.0 24v
Posts: 1358
Joined: Sun Apr 28, 2013 11:02 pm
Location: Coalville, Leics.

Re: need advoce maf sensor

Post by dirtydirtydiesel » Fri Mar 29, 2019 6:59 pm

Like this :)
155388192445865536331.jpg
That took all of 15 seconds to remove, as I said no screwdriver needed just push the plug into the M.A.F
sensor & pull that tab down & then out :cheesy:
2002 110 HDi estate, Rapier in monaco blue! ( found quite a bit more power :cheesy: )
1999 3.0 V6 SE coupe in Diablo Red ( my baby )
2006 206 1.4 16v sport in Aegean blue ( wife's shopping trolley :roll: )

pp2000 owner / user, can offer Diagnostic's / fault code, reading / clearing for beer tokens in Leicestershire.

exec406
2.0 16v
Posts: 132
Joined: Thu Jan 24, 2008 8:52 pm

Re: need advoce maf sensor

Post by exec406 » Fri Mar 29, 2019 7:44 pm

Thanks for that, took no time to remove now I knew where the tab was...

Even better, the flat spots from the acceleration have gone and I now have the full engine power back with the MAF plug disconnected. No more going up hills at 20mph... didn't think unplugging the MAF would fix that but it has.

Also with a Euro 3 engine, you don't get the EML light coming on.

I read on here it's OK to leave the MAF disconnected - would that be OK for say a week or two until I get a new MAF (Siemens / VDO) as I read the ECU goes back to a default setting with no MAF plug connected?

Thanks
2003, '03' 406 Executive 2.2hdi 136.

GingerMagic
3.0 24v
Posts: 3150
Joined: Fri Apr 06, 2012 9:02 pm
Location: Bournemouth

Re: need advoce maf sensor

Post by GingerMagic » Fri Mar 29, 2019 8:25 pm

It'll be fine, just not as optimum as it could be with a fully functioning MAF.
My wife's Picasso had it unplugged for nearly 5 years :cheesy:
1999 T4 family wagon
2005 Vauxhall Meriva
1998 406 V6 Coupe - Midlife crisis..!
PP2000 user, can help with faults / diagnostics in the Bournemouth area.

dirtydirtydiesel
3.0 24v
Posts: 1358
Joined: Sun Apr 28, 2013 11:02 pm
Location: Coalville, Leics.

Re: need advoce maf sensor

Post by dirtydirtydiesel » Sat Mar 30, 2019 4:04 am

exec406 wrote:
Fri Mar 29, 2019 7:44 pm
Thanks for that, took no time to remove now I knew where the tab was...

Even better, the flat spots from the acceleration have gone and I now have the full engine power back with the MAF plug disconnected. No more going up hills at 20mph... didn't think unplugging the MAF would fix that but it has.

Also with a Euro 3 engine, you don't get the EML light coming on.

I read on here it's OK to leave the MAF disconnected - would that be OK for say a week or two until I get a new MAF (Siemens / VDO) as I read the ECU goes back to a default setting with no MAF plug connected?

Thanks

Your welcome,
Happy to of helped.
Glad you now 'know' you need a new maf before you waste your hard earned :)
2002 110 HDi estate, Rapier in monaco blue! ( found quite a bit more power :cheesy: )
1999 3.0 V6 SE coupe in Diablo Red ( my baby )
2006 206 1.4 16v sport in Aegean blue ( wife's shopping trolley :roll: )

pp2000 owner / user, can offer Diagnostic's / fault code, reading / clearing for beer tokens in Leicestershire.

Post Reply