Misfire

[polski]

hi, ive got a 51 plate 1.9 tdi, which has started to run on 3 cylinders only when hot and usually after about 12 miles.

rac thought it was a sticking injector as it didnt show any faults. but when you switch it off and on, sometimes it clears the fault, sometimes not.

there are no warning lights showing, so dont think its lambda. it seems to go into limp home mode, but its definately running on 3 cylinders, as opposed to just running seemingly without the turbo.

it started off doing it occasionaly, now its every time you go out in it, its guarenteed to misfire. ive put a new fuel filter on, but its still the same.

any ideas ?

[sepulchrave]

Sounds like a faulty unit injector as the RAC man suggested, it should be easy to diagnose which one is at fault and get it replaced although I recommend you get it done at an independant PD specialist rather than a main dealer.

 

For gods sake stay away from ordinary backstreet garages, most of them view PD engines as incomprehensible witchcraft but in the current economic climate they may be tempted to 'have a go' and do more harm than good!

 

It will still be moderately expensive to repair if a new unit injector is required since it is a VAG dealer only part and new bolts and gaskets will also be needed.

[seatkid]

Check the wiring loom to the injectors. Check the connectors are secure and clean. There is a post that wiring looms of a certain vintage gave problems of this nature and Ford issued a new design. Try a search.

[polski]

Sounds like a faulty unit injector as the RAC man suggested, it should be easy to diagnose which one is at fault and get it replaced although I recommend you get it done at an independant PD specialist rather than a main dealer.

 

For gods sake stay away from ordinary backstreet garages, most of them view PD engines as incomprehensible witchcraft but in the current economic climate they may be tempted to 'have a go' and do more harm than good!

 

It will still be moderately expensive to repair if a new unit injector is required since it is a VAG dealer only part and new bolts and gaskets will also be needed.

[polski]

Sounds like a faulty unit injector as the RAC man suggested, it should be easy to diagnose which one is at fault and get it replaced although I recommend you get it done at an independant PD specialist rather than a main dealer.

 

For gods sake stay away from ordinary backstreet garages, most of them view PD engines as incomprehensible witchcraft but in the current economic climate they may be tempted to 'have a go' and do more harm than good!

 

It will still be moderately expensive to repair if a new unit injector is required since it is a VAG dealer only part and new bolts and gaskets will also be needed.

thanks for your advice, im still not sure weather or not to plug it into frauds machine to see if they show any faults. im not going to let them loose on it. not at their prices.

[polski]

Check the wiring loom to the injectors. Check the connectors are secure and clean. There is a post that wiring looms of a certain vintage gave problems of this nature and Ford issued a new design. Try a search.

yea , ive seen those posts too. im def gonna try to look at the wiring loom too. thanks. i will post what the out come is.

cheers

[polski]

Check the wiring loom to the injectors. Check the connectors are secure and clean. There is a post that wiring looms of a certain vintage gave problems of this nature and Ford issued a new design. Try a search.

yea , ive seen those posts too. im def gonna try to look at the wiring loom too. thanks. i will post what the out come is.

cheers

Turned out to be the injector wiring loom. it showed a fault when plugged into the machine at tt automotive in loughborough, they ended up fitting a new loom there and then. total price

[AndyR]

I had this on my 2001 1.9Tdi

 

It turned out to be a loose electrical connection on the injector loom

 

Good luck !