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Mass air flow fault

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Mass air flow fault

Postby Joeycle » Thu Nov 23, 2017 3:37 pm

Hi has anyone had a mass air flow fault, where the sensor, air box , hoses and inter cooler have been changed and still get the fault. It only happens above 30 mph.

Thanks
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Re: Mass air flow fault

Postby loot » Thu Nov 23, 2017 7:18 pm

Air flow fault it's very rarely the air flow sensor (maf) at fault but rather the egr/turbo/pipework at fault which then makes it read wrong.

Maf fault will be dtc for maf circuit. But other will show maf to high or maf to low (generally)

What codes did you get?
56 350 2.2 130ps mk7 with 2 side doors 8)
65 290 2.2 125ps custom with 2 side doors 8)
07 350 170ps
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Re: Mass air flow fault

Postby knobby1 » Thu Nov 23, 2017 7:43 pm

loot wrote:Air flow fault it's very rarely the air flow sensor (maf) at fault but rather the egr/turbo/pipework at fault which then makes it read wrong.

Maf fault will be dtc for maf circuit. But other will show maf to high or maf to low (generally)

What codes did you get?


What Loot said..^^ MAF & MAP sensors rarely fail.

Along with the above....You may also get turbo "overboost/underboost" codes as well when the EGR is stuck open or closed.

Lord Knobrot
2008 2.4L RWD 170+PS 6-speed 350 LWB High Roof.

When I die, I want to go peacefully in my sleep like my Grandfather, not screaming like the passengers in his car..!
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Re: Mass air flow fault

Postby Joeycle » Thu Nov 23, 2017 9:42 pm

The lads have used a donor vehicle and thrown parts at it, I briefly saw a code think it was 1,800 or 800 maf sensor fault. Egr was re-calibrated great to 80mph once then back to normal engine fault. They are on about a smoke test next
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Re: Mass air flow fault

Postby knobby1 » Fri Nov 24, 2017 12:41 am

Joeycle wrote:The lads have used a donor vehicle and thrown parts at it, I briefly saw a code think it was 1,800 or 800 maf sensor fault. Egr was re-calibrated great to 80mph once then back to normal engine fault. They are on about a smoke test next


What engine are we talking about..??

Lord Knobrot
2008 2.4L RWD 170+PS 6-speed 350 LWB High Roof.

When I die, I want to go peacefully in my sleep like my Grandfather, not screaming like the passengers in his car..!
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Re: Mass air flow fault

Postby Joeycle » Fri Nov 24, 2017 1:16 pm

100 T260 2.2
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Re: Mass air flow fault

Postby Joeycle » Sun Dec 03, 2017 8:03 pm

It was the air intake manifold in the end
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