can faulty injectors cause blue smoke on idle,a local garage has said that they are not shutting off properly when car static but ok when driving,can anyone clarify this please

If you can get some one to scan the car with VCDS then you can look at the individual injector quantities at idle and load. It will give you an idea if this is the case and which one(s) is faulty.

 

I had an issue on my car where one was not shutting off properly. The symptoms were:  smoke on start-up with uneven idle at first. When engine was hot and under load the uneven idle would come back as the other injectors would try to balance the faulty one.

 

New injectors are very expensive £300+!!! However, it is rare for them to fail. I picked up one from ebay for around £40. A mate had an injector test bed and checked the spray pattern which was fine. Bought a seal kit from Darkside Dev for about £20. Got my local garage to fit for around £70.

 

Good luck

53 minutes ago, Golf-Fiend said:

If you can get some one to scan the car with VCDS then you can look at the individual injector quantities at idle and load. It will give you an idea if this is the case and which one(s) is faulty.

 

 

Not always. I had some problems went to a garage. VCDS showed some strange values for 2 of injectors, especially for one. If the car couldn't had another "Fuel rail pressure sensor" error then we all probably would think about injector and only injector fault.

So, injectors were taken out and were tested and found to be OK. That sensor was faulty and VCDS showed strange values for injectors.

Edited 10 January, 20197 yr by Jevpls