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#1628477 - 09/01/2019 13:00 Mass Air Flow Meter
OnlyItalian Offline
Making a profit

Registered: 14/12/2014
Posts: 320
Loc: uk
Just thought I'd mention this as it's more common than you might think.

I have a VIS which is now fully recommissioned at great expense.

I noticed it wasn't really pulling as expected above about 5500RPM. Looking at the specs for the engine peak power is delivered at 6700RPM which suggests the engine should be a proper screamer.

Anyway I disconnected the Mass Air Flow Meter and gained about 30bhp and I promise I'm not exaggerating. As the ECU learned it got faster and faster. Feels more like 170bhp than 152bhp!

Ordered a new MAF meter today.

My mate had a Marea and he had the exact same experience with that. Definitely worth unplugging the meter and see if you gain any power.


Edited by OnlyItalian (09/01/2019 13:00)
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"Proud owner of LE141 and a 99 VIS broomie "

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#1628478 - 09/01/2019 13:08 Re: Mass Air Flow Meter [Re: OnlyItalian]
Nigel Online   sleepy
Club member 123
Forum veteran

Registered: 16/12/2005
Posts: 16998
Loc: Staffordshire
Its more likely that your MAF was knackered and you were actually only getting about 130bhp. Fitting a new one has given you the 155bhp you should always have had
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#1628481 - 09/01/2019 13:40 Re: Mass Air Flow Meter [Re: OnlyItalian]
OnlyItalian Offline
Making a profit

Registered: 14/12/2014
Posts: 320
Loc: uk
You're right, felt like about 130bhp to me before. But Still think it's putting out more than 152bhp now.
_________________________
"Proud owner of LE141 and a 99 VIS broomie "

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#1628482 - 09/01/2019 13:41 Re: Mass Air Flow Meter [Re: OnlyItalian]
OnlyItalian Offline
Making a profit

Registered: 14/12/2014
Posts: 320
Loc: uk
You're right, felt like about 130bhp to me before. But Still think it's putting out more than 152bhp now. Hardly anything in it between me and a E39 BMW 530 that's had a weight cut to 1360kgs.
_________________________
"Proud owner of LE141 and a 99 VIS broomie "

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#1628495 - 09/01/2019 20:30 Re: Mass Air Flow Meter [Re: OnlyItalian]
Gripped Offline
Club member 1144
I need some sleep

Registered: 20/12/2005
Posts: 3067
Loc: S. Wales. Way beyond my means
Precisely what happened with my VIS. It had a big power dip at high revs. New MAF sorted it. Luckily the VIS used the later MAF which is cheaper. I think I paid around £90.
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#1628508 - 10/01/2019 14:17 Re: Mass Air Flow Meter [Re: Gripped]
OnlyItalian Offline
Making a profit

Registered: 14/12/2014
Posts: 320
Loc: uk
Originally Posted By Gripped
Precisely what happened with my VIS. It had a big power dip at high revs. New MAF sorted it. Luckily the VIS used the later MAF which is cheaper. I think I paid around £90.


Yep, ordered a new one yesterday. Bosch from ECP. £90 too but only because they have a 35% discount on atm.
_________________________
"Proud owner of LE141 and a 99 VIS broomie "

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#1628542 - 12/01/2019 14:34 Re: Mass Air Flow Meter [Re: OnlyItalian]
OnlyItalian Offline
Making a profit

Registered: 14/12/2014
Posts: 320
Loc: uk
Fitted new maf meter this morning. Idling smoothly again, still got all its power but engine warning light staying on. Does it take a few starts to go off or codes clearing or something?
_________________________
"Proud owner of LE141 and a 99 VIS broomie "

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#1628567 - 13/01/2019 10:52 Re: Mass Air Flow Meter [Re: OnlyItalian]
OnlyItalian Offline
Making a profit

Registered: 14/12/2014
Posts: 320
Loc: uk
Just found this. 156k on the clock and still putting out 165bhp. I'm starting to think the VIS is currently the most undervalued coupe of all.


http://www.torquestats.com/modified/index.php?car_id=201
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"Proud owner of LE141 and a 99 VIS broomie "

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#1628584 - 13/01/2019 22:20 Re: Mass Air Flow Meter [Re: OnlyItalian]
Gripped Offline
Club member 1144
I need some sleep

Registered: 20/12/2005
Posts: 3067
Loc: S. Wales. Way beyond my means
Indeed ! My VIS is the next one in the list !

I'm currently on 103k miles. So plenty of fun to go !

driving
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#1628810 - Yesterday at 14:02 Re: Mass Air Flow Meter [Re: OnlyItalian]
OnlyItalian Offline
Making a profit

Registered: 14/12/2014
Posts: 320
Loc: uk
Originally Posted By OnlyItalian
Just found this. 156k on the clock and still putting out 165bhp. I'm starting to think the VIS is currently the most undervalued coupe of all.


http://www.torquestats.com/modified/index.php?car_id=201


More evidence of the quality of the VIS engine. Four Vis on this list and they all put out more power than the 152bhp that wiki claims to be correct!

https://www.fiatcoupeclub.org/forum/ubbthreads.php?ubb=showflat&Number=1143896#Post1143896


Edited by OnlyItalian (Yesterday at 14:03)
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"Proud owner of LE141 and a 99 VIS broomie "

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#1628814 - Yesterday at 19:32 Re: Mass Air Flow Meter [Re: OnlyItalian]
Gripped Offline
Club member 1144
I need some sleep

Registered: 20/12/2005
Posts: 3067
Loc: S. Wales. Way beyond my means
The two Coupés with 165 and 169(mine laugh ) we're both remapped by Flea which could explain it. Mine was spot on 155bhp before remap.


Edited by Gripped (Yesterday at 20:03)
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