MAF Sensors, Wires and broken connectors

[vorleys1982]

Hi All,

I did search for an existing thread so apologies if I have doubled up, but I didn't see any posts similar to this.

I have a 1.4 tsi twin charge (CAVD) Golf 2010. For years I've had issues with power delivery, fuel economy and choked up plugs. I had several other symptoms and combined this lead to several mechanics diagnosing it as the dreaded piston ring failure. I will post a full story about the golf as it has been a journey all in itself...

Anyway... during one of my in depth engine bay explorations I found two broken wires on a MAF sensor (picture attached)



that had been returning an 'open circuit' error on my OBD2 reader. It turns out that the default for the MAF is to tell the engine it is cold (denser air) and to up the fuel hence the sooting and high fuel use. Long story short, I bought a repair kit from VW in what turned into an expensive mistake and it didn't work at all (yellow wires).



Does anyone know where I might be able to buy an engine loom or part of a loom that I could use to repair the existing loom? I've found the aftermarket and even the OEM connectors are ….well....crap. A mechanic friend of mine suggested it would be better to take an existing connector from a loom, cut the wires long and solder and heat shrink them onto the old loom. I've called several wreckers and the answer is usually that they don't have any VW's or they don't keep Looms.

Any suggestions?

[h100vw]

Hi All,

I did search for an existing thread so apologies if I have doubled up, but I didn't see any posts similar to this.

I have a 1.4 tsi twin charge (CAVD) Golf 2010. For years I've had issues with power delivery, fuel economy and choked up plugs. I had several other symptoms and combined this lead to several mechanics diagnosing it as the dreaded piston ring failure. I will post a full story about the golf as it has been a journey all in itself...

Anyway... during one of my in depth engine bay explorations I found two broken wires on a MAF sensor (picture attached)



that had been returning an 'open circuit' error on my OBD2 reader. It turns out that the default for the MAF is to tell the engine it is cold (denser air) and to up the fuel hence the sooting and high fuel use. Long story short, I bought a repair kit from VW in what turned into an expensive mistake and it didn't work at all (yellow wires).



Does anyone know where I might be able to buy an engine loom or part of a loom that I could use to repair the existing loom? I've found the aftermarket and even the OEM connectors are ….well....crap. A mechanic friend of mine suggested it would be better to take an existing connector from a loom, cut the wires long and solder and heat shrink them onto the old loom. I've called several wreckers and the answer is usually that they don't have any VW's or they don't keep Looms.

Any suggestions?

That my friend is how VW fix wiring problems. They provide a repair wire with the correct terminal. So the mechs don't have to have specific training on all the different crimping tools.

So the kit is correct. Pin up the connector and then join the yellow wires to the engine loom. This is a reliable way to repair the problem without specialist tooling you will use once.

[vorleys1982]

Thanks for the info. I did follow the instructions and i bought the parts directly from a genuine VW service department and despite this the terminals did not fit into the plug properly no matter what I did. overall for the four wires, the plug and the connectors $120+. It may have been something I did wrong, but more likely the parts just didn't fit together properly.