My MAF is broken . Is it fixable ?

I decided to check google images , just to see if there should be a wire where it looks like theres one missing off mine ,and there is .

That wire diode/resistor thing is missing off mine . I'm going to phone a motor electrician and check in the motor factors .
Should I just buy a new one ? €130ish .

Does anyone know exactly what I need to fix it myself ?

Hi Wulf,

Just checked my old original Bosch MAF - it's exactly like the one in the pics - with a resistor thingy on the side.

I'm not sure if the Pierburg MAF I have now (came with the Synergy) has that bit or not.

Don't know how important that bit is. It might be a temp sensor.

My 2004 TD4 has a temp sensor between the two top turbo hoses.

Singvogel.

Do you still want EGR active? If you don't then disconnect its solenoid on the bulkhead and the Maf sensor will be redundant.

The IAT sensor is in the inlet manifold near the oil filler cap.

I went to the motor factors first €130 for a new pierburg .
Next went to dealers and the very helpful Polish guy looked up the schematics and it showed a 3ohm resistor .I got one from Maplin for 45c. but he only had a 2 or 3 watt 3.3ohm resistor . Just fitted it and it dunt work .

There is another place a 20 min drive away that has lower (down to 0.25w) wattage 3ohm resistors .

edit:what the schematic from the dealer actually shows is 2 resistors , "1E3 OHMS" I am trying to find ,through google what 1e3 ohms means .

think I found the answer ,a kiloohm,from Convert kiloohm to kilohms - Conversion of Measurement Units .
It says :
Definition: Kiloohm

The SI prefix "kilo" represents a factor of 103, or in exponential notation, 1E3.

So 1 kiloohm = 103 ohms.

The definition of a ohm is as follows:

The ohm (symbol: &#937 is the SI unit of electrical impedance or, in the direct current case, electrical resistance, named after Georg Ohm. It is defined as the resistance between two points of a conductor when a constant potential difference of 1 volt, applied to these points, produces in the conductor a current of 1 ampere, the conductor not being the seat of any electromotive force.

and I ordered an IAT sensor for the morning €13 from motor factor , dealer price €55+ vat@23% and might have to wait a week

Could the original Maf resistor have made its way through the turbo ? or is it possibly lodged inside the turbo somewhere ?

I don't know if it ever had one, many sensors don't. You could do with another L series owner to confirm. If there was I'd be surprised if it's lodged anywhere.

I don't follow why you're not just disabling egr then you don't need a MAF.

OldIrishWulf said:

think I found the answer ,a kiloohm,from Convert kiloohm to kilohms - Conversion of Measurement Units .
It says :
Definition: Kiloohm

The SI prefix "kilo" represents a factor of 103, or in exponential notation, 1E3.

So 1 kiloohm = 103 ohms.

Click to expand...

Sorry to do this to you wolf old chum, but the cut and paste has dropped all the formatting (superscript) of the text, so now the answer you gave about kiloohms now appears wrong.

It should be 10 raised to the power three, which is 1000. So I kilohm, otherwise known as 1k is a thousand ohms, not 103. The 1E3 bit is right, and this is also a thousand.

You need to get a 1000 Ohm or 1K resistor. It's not working because it is out by a factor of nearly 10.

Don't know how desparate you are, but if there's no massive rush, PM me your address and I'll pop a couple in the post to you. Feck paying Maplins extortionate prices.

if you are desperate I have some in one of my electriclas boxes some where I will find them out just in case but are you sure it is a resistor it looks much like a diode to me as I have not seen a resistor like that

hi again upon looking closer it could be a a 1kOhm resistor the carbon film variety you can get 5 for 49 pence of RS- Radio supplies of the net
normal if it is a diode it would have one end black to tell you which way round to put it the black end is the end which stops the signal going through hope this helps you all god it has been a long time since I did any electronics and things are changing bring back the old valves lol

Chaser said:

I don't follow why you're not just disabling egr then you don't need a MAF.

Click to expand...

I have tried that , but I wanted to fix the MAF . If the IAT sensor dunt work ,(should be in the motor factors in the morning ),I will take it to someone with a fault code reader .

Optimus Prime said:

Sorry to do this to you wolf old chum, but the cut and paste has dropped all the formatting (superscript) of the text, so now the answer you gave about kiloohms now appears wrong.

It should be 10 raised to the power three, which is 1000. So I kilohm, otherwise known as 1k is a thousand ohms, not 103. The 1E3 bit is right, and this is also a thousand.

You need to get a 1000 Ohm or 1K resistor. It's not working because it is out by a factor of nearly 10.

Don't know how desparate you are, but if there's no massive rush, PM me your address and I'll pop a couple in the post to you. Feck paying Maplins extortionate prices.

Click to expand...

Thanx Optimus , I decided to google what 1e3 means and found its 1 x10 to the power of 3 .Why they dont just call it 1kohms must be to keep peeple like me ignorant . Thanx very much for the offer but I went out and bought 10 1E3's for €1.35 ,only sold in 10's.

teddywood1 said:

hi again upon looking closer it could be a a 1kOhm resistor the carbon film variety you can get 5 for 49 pence of RS- Radio supplies of the net
normal if it is a diode it would have one end black to tell you which way round to put it the black end is the end which stops the signal going through hope this helps you all god it has been a long time since I did any electronics and things are changing bring back the old valves lol

Click to expand...

Thats handy to know there's a right and a wrong way to fit the thing .Oh that probably doesn't apply to resistors ? or does it ?

I only know what a valve is ,because a friends dad asked me to pick him up a few when he heard I was off to Liverpool for Christmas .I was about 12 diddy bopping around the streets of Liverpool alone looking for some side street lecky shop .

OldIrishWulf said:

Thats handy to know there's a right and a wrong way to fit the thing .Oh that probably doesn't apply to resistors ? or does it ?

Click to expand...

nope, can fit a resistor either way round.

Interesting idea, if fitting a 1k resistor works, could you get a variable resistor centred on 1k, and then adjust it to find a setting that works best, then measure the value and then fit that value resistor.

kind of like drift compensation

Chaser said:

I don't follow why you're not just disabling egr then you don't need a MAF.

Click to expand...

OldIrishWulf said:

I have tried that , but I wanted to fix the MAF . If the IAT sensor dunt work ,(should be in the motor factors in the morning ),I will take it to someone with a fault code reader .

Click to expand...

My thinking was if you want to fix the maf because you want egr active then that's fine. But if you think that your maf is the cause of the mil coming on then I don't think (but not certain) it can be.
You could do with someone with an l series (like chromie) chiming in on this, may be he would disconnect his to see if it brings on the mil. If it doesn't that should prove a maf fault isn't detected buy the ecm and isn't your problem, if it does then you know your not wasting your time.

Chaser said:

My thinking was if you want to fix the maf because you want egr active then that's fine. But if you think that your maf is the cause of the mil coming on then I don't think (but not certain) it can be.

Click to expand...

f:censored: I just typed a long , probably informative final post but it timed out and I lost it .
It turned out to be a dodgey MAP connection .I think Chaser suggested that very early on .I found it when I got my missis out to watch while I twiddled wires .
I took it for a drive and it seems a bit sluggish so I bought a new fuel filter ,coz I don't think I changed it last service .I am going to check the in tank sender first .

I will post this now , before I lose it again .
THANX VERY MUCH .