Possible MAF Issues??

[A.m.C_Ibiza1]

Posted this origionaly in the MK3 section but thought here would be more appripriate! I dont know if there is a problem atall, just feelis a little sluggish! Serivce is due but i found out how to test the maf, just dont know how to read the results!!


Just done a little log with VAGCOM, the first row being RPM, second being Requested MAF and the third being Actual MAF:

987 850 530
987 850 535
987 850 525
1008 850 520
1029 850 520
1113 850 540
1176 850 540
1239 850 555
1302 850 550
1365 850 585
1470 850 590
1575 850 590
1722 850 625
1890 850 660
2058 850 675
2184 850 710
2331 850 720
2499 850 645
2268 850 610
1785 850 615
1407 850 640
1491 850 625
1554 850 605
1470 850 575
1470 850 545
1407 850 540


Now this looks to me like the MAF is failing but i dont know! The Ross-Tech site said to hit it hard in 4th gear but i cant do that with traffic around, is that why it reads low?? Might be worth mentioning the car has had a custom remap if that means anything!!

Its on a Ibiza TDi Sport running approx 180 BHP on a Golf GTTDI Turbo

Any help appriciated!

 

[aaronbromley]

Have you had a MAF replaced before? what milage have you done, apparently at around 40k miles they can start to clog up.

 

[A.m.C_Ibiza1]

it has been changed, maybe 10k ago! How would i go about giving it a clean?? Car is on 70k.

 

[aaronbromley]

I have heard of people running with it disconnected to check if the MAF is at fault.

 

[sssstew]

If you logged it right then you have very low figures for actual. Too low. MAF either needs cleaning (temp solution) or replaced.

 

[aaronbromley]

If you logged it right then you have very low figures for actual. Too low. MAF either needs cleaning (temp solution) or replaced.

Couldn't agree more! Replacing is the best option.

 

[A.m.C_Ibiza1]

was afraid of that! Cars just love asking for new parts lol!

 

[A.m.C_Ibiza1]

well i unpluggd the maf and the car idled a bit smoother, low boost but much smoother! I bought a new maf and now the car is a lot more responsive! And spins up through 2nd and 3rd! Result!

 

[sssstew]

as expected Glad youve got it back

 

[aaronbromley]

Pleased it's sorted now and didn't cost an arm and a leg.