i am getting intermittent missfire on 1.9  130 bhp. fuel filters been changed and i have tried several different garages for fuel. it can sometimes go 3 or 4 days without bother then out of the blue start again! nearly 200,000 on clock egr valve changed 33,000 miles ago. please help im demented!

Got any fault codes?

The wiring loom for the injectors inside the engine is a frequent cause of intermittent misfire on the PD engines. After a high mileage, the loom becomes brittle and the connectors intermittent. Often, there is no fault code.

 

The loom is cheap and easy to change in-situ. Warm the new one before you fit it, so the carrier becomes flexible. Despite a sharp bend, it goes in without a problem.

 

200k miles is about run in for a 1.9 PD.

 

rotodiesel.

Edited 14 February, 201412 yr by rotodiesel

The wiring loom for the injectors inside the engine is a frequent cause of intermittent misfire on the PD engines. After a high mileage, the loom becomes brittle and the connectors intermittent. Often, there is no fault code.

 

The loom is cheap and easy to change in-situ. Warm the new one before you fit it, so the carrier becomes flexible. Despite a sharp bend, it goes in without a problem.

 

200k miles is about run in for a 1.9 PD.

 

rotodiesel.

thanks for quick responses, no fault on cars dash, havnt had diagnostic done yet but wiring change is all i have left to do. i will be at garage first thing tomorrow! is it a dealer part only? thank you for your help.

big thankyou to rotodiesel had wiring changed and cars running smoothly again. cheers!

roto also saved my car with this advice.

I had this on one of my A4's, I just cleaned and re-crimped the connectors and it fixed it..

Any1 got a link where to get 1 at a good price?