My Landy

New Member

• Aug 21, 2015

• #1

My Landy recently failed its MOT due to emissions much to my disappointment. My local garage charged me a fortune for diagnosis and as a result had to have my MAF sensor replaced and they told me it was full of sand. Is this actually possible???
I thought that was what an air filter would do before it reached the engine???

 

vilguy

Do'er of stuff and the like

• Aug 21, 2015

• #2

i think yourll find they are having your pants down

for a start, how are you supposed to get sand IN a resistor ,

How much have they charged you to tell you that your maf is poorly because its pretty easy to diagnose a poorly maf.

 

My Landy

New Member

• Aug 21, 2015

• #3

Uhm - Basically it failed its MOT as I said on emissions. They kept my landy (my local garage) for approx 4 days sending me back and forth saying they was diagnosing the fault. Strangely enough as I picked it up every evening cos needed it, one evening before I picked it up they said we will order and try a new air flow sensor and when I gets in it was showing the engine management light (emissions) lit up, never there before. Then next morning I didn't say anything and let em carry on and low and behold it passes MOT and tells me that the sensor was full of sand!!

 

bankz5152

Well-Known Member

• Aug 21, 2015

• #4

Sounds like they are having you on. Unless theres a split in the hose past the air filter, damaged air filter then i dont see how sand can get in there.

Secondly the MAF in my Td5 has been shot for 2 years still passed the MOT with half the max emmissions.

 

wammers

No longer with us, RIP

Donater

• Aug 21, 2015

• #5

bankz5152 said:

Sounds like they are having you on. Unless theres a split in the hose past the air filter, damaged air filter then i dont see how sand can get in there.

Secondly the MAF in my Td5 has been shot for 2 years still passed the MOT with half the max emmissions.

Click to expand...

MAF on a diesel doesn't do the same job as the petrol one.

 

bankz5152

Well-Known Member

• Aug 21, 2015

• #6

Cant see a motor listed assumed....

 

wammers

No longer with us, RIP

Donater

• Aug 21, 2015

• #7

bankz5152 said:

Cant see a motor listed assumed....

Click to expand...

Must be a petrol duff MAF on a diesel can't do much to emissions. More to do with EGR. Diesels are throttled by fuel not air like the petrols, were the air going through the MAF controls fueling. On a diesel for any given manifold pressure or throttle demand there is always the same amount of air and the same amount of fuel is used.

 

bankz5152

Well-Known Member

• Aug 21, 2015

• #8

Thats what I thought which is which I thought the garage was having him on!