Testing MAF

[Pirvu Eugen]

I have same setup except the miltek and same idle problems but no hesitation. I will try tomorow to disconect the maf to see what hapends.

[GeorgeS2UK]

Origional MAF -

I have also checked the TPS (throttle position sensor)

Harness Connected

1 & 2 = 4.7V
2 & 3 = 0.1V idle
2 & 3 = 0.27v - 4.68v open throttle to WOT

1 & 2 = 2310 ohms
2 & 3 = 1020 ohms idle
2 & 3 = 1020 - 2730+ ohms open throttle to WOT

ISV - 11.87v
Visual check - removed ISV from the TB, ignition turned over, and the barrell functions

All seem fine but still lumpy idle and hesitation on initial throttle

Fuel OK
Hoses Checked
Plugs OK
Cleared ECU

Last thing though, if i remove the MAF connector idle is good

[valjo]

Stock + Milteck Exhaust and MRC Generic Chip (3B)

i guess that you have changed your maf or you still have first one?

[GeorgeS2UK]

thanks for that infos! Are you running stock s2?

btw for idle problem try cleaning ISV, check lambda, POT/idle switch .....

Stock + Milteck Exhaust and MRC Generic Chip (3B)

[valjo]

Eng Off - 1.4v
Eng Idle - 2.7v
Throttle open 3v - 4.7v
Burn off test - OK

But I still have an Idle problem, and still cant track it down,

Guess its not the MAF though

thanks for that infos! Are you running stock s2?

btw for idle problem try cleaning ISV, check lambda, POT/idle switch .....

[Pirvu Eugen]

what multimeter you use? should be faster reading? or i have bad MAF? i dont have new one and is very expensive only for a test.
Thanks!

[GeorgeS2UK]

MAF test

what readings do you get?

Eng Off - 1.4v
Eng Idle - 2.7v
Throttle open 3v - 4.7v
Burn off test - OK

But I still have an Idle problem, and still cant track it down,

Guess its not the MAF though

[Pirvu Eugen]

engine off, ignition on 1.2V, idling 1.7V and short full throttle ~2.6V and still no boost cut out like the majority off the MAF sensor failure. The burn off is ok also.
Not sure what is the problem. Hope we get an answer.
All the best!

[valjo]

I have also same small readings! I have bad MAF?
I am curious!

what readings do you get?

[Pirvu Eugen]

I have also same small readings! I have bad MAF?
I am curious!

[valjo]

@paul: i know that are quite low.....
it would be nice if you could test yours to compare voltage!

[S2central.net]

Valjo - your figures do sound low indeed according to that test which I found in the AAN/ABY diagnostic manuals. I can test mine again at the weekend for comparison - hopefully others can too.

[s2_bo]

hi stu!

i tried another one today but it is old too, with lower voltages....
i will buy new one from vagparts very soon

Not trying to steel business from Vag parts here but check this thread out first, might be cheaper:

http://www.s2forum.com/forum/showthread.php?t=25384

[4WheelDrifter]

Is there anyone out there with a new(ish) that fancies doing the s2central MAF test?

[valjo]

Those values sound a little low. Have you not got another MAF you can try?

hi stu!

i tried another one today but it is old too, with lower voltages....
i will buy new one from vagparts very soon