Hi,please bare with me, recently bought a 2011 1.4 tdci fiesta. I broke down, aa plugged it in and said number 4 injector open circuit.  So i Fitted new lucas injector and coded it in. AA wanted 400 quid lol. 

   Drives fine until I stop car, turn ignition off, buy a pasty come back to car drive off, before I can into 2nd gear a  engine malfunction  warning on dash again. Now I'm leaning to a fault in the loom, finding it difficult to find a loom to match. I've uploaded a pic of the engine, my old fiesta I had to remove the intake manifold to repair  chuffing injector seals, but this engine it's just the plastic engine cover. Alot easier but all my searches on net unable to find a loom for this engine style. I could run 2 wires from injector to ecu but I would like to find a fault.

No picture?

Did you code the correct injector? I believe they are numbered in firing order rather than from the end of the engine.

On 9/3/2025 at 7:39 AM, pcaouolte said:

No picture?

Did you code the correct injector? I believe they are numbered in firing order rather than from the end of the engine.

Thanks  yes replaced number 4 injector( closest to timing belt)  still got number 4 injector fault, think I need to look for a wiring fault, can anyone let me know if they have had wiring faults in the injector loom.

The error was #4 injector open circuit. Given that, the first thing to do is measure the old one with a multimeter and see if it is o/c. If not, there is a busted wire or an intermittent connection. Logically it will be at the engine end of the wires as they get subjected to heat and vibration so check the connector. Pull the leads and ensure they are not masking an internal break, don't be afraid to cut and rejoin a broken wire, use glue lined heat shrink. Not being snobbish but with a fourteen year old car, direct wiring from ECU to injector is a perfectly acceptable repair.