It'll maybe overfuel slightly but it'll start no problem if the sensor is faulty and it'll run fine.  If you plug the sensor back in after it's started the engine will return to normal and keep running too.  The faulty fuel temp sensor problem is a common occurrence on mkv golfs.

I took the plunge and purchased vagcom to find out what was happening. As previously the car was throwing up a camshaft position sensor fault code. In addition to this the MAF sensor readings were all over the place once I had graphed them.

I replaced both camshaft position sensor and MAF sensor and the issue has gone.

Hope this helps people in future.

On 16/12/2013 at 08:03, Bronson1 said:

Thanks for the reply.

 

Would the VCDS not just come back with no codes seeing as the code reader I have isn't throwing any up.  I'm assuming that it could be useful for running diagnostics but I've read a lot of threads where people have been having similar problems and the garage have had no luck with the VCDS and have just started replacing the likely culprits.  Because of this I am reluctant to pay the garage another £60 unless I'm sure it will throw up a code.

 

Also, I'm wondering if the two faults are related.  I have two reasons to suspect this.  Firstly that when the battery was replaced both problems went away (although I'm struggling to find an explanation for this temporary fix other than the starter motor as you mentioned however this doesn't explain the power loss).  Second is that both problems will happen together (i.e. the car struggles to start.  Once started the car will temporarily lose power whilst driving). If the car starts first time (even when hot) the car will not lose power. 

 

It's maybe worth noting that if the car struggles to start but when it does is left idling then the revs will occasionally drop as if it's about to stall then the engine will catch itself again and go back to idle.

 

It would be interesting to hear your thoughts on this.  I am going to try and scan for codes this morning with the engine hot as I read another thread saying that because the faulty sensor (assuming the same could apply to a wiring loom) fixes itself as the engine cools the car may forget about it when cold.  I was under the assumption that the code would be stored but hey, it's worth a try! 

Hi,

I'm having the same problem, 

I've changed the crankshaft sensor,  changes the coolant sensor,  cleaned the air flo sensor, changed the fuel tank sender unit.

Still the same .

 

I'm now thinking it could be the tandum pump, this is a common problem with these.

 

I'll buy a used one to see if it will fix the problem

 

I'll keep ya posted. 

Just now, Walter123 said:

Hi,

I'm having the same problem, 

I've changed the crankshaft sensor,  changes the coolant sensor,  cleaned the air flo sensor, changed the fuel tank sender unit.

Still the same .

 

I'm now thinking it could be the tandum pump, this is a common problem with these.

 

I'll buy a used one to see if it will fix the problem

 

I'll keep ya posted. 

Sorry this was 2013 missed the date lol