Yesterday morning after driving for about a mile or so I thought I felt a couple of miss fires and then gone into limp mode not reving above 2000 rpm engine light and stability control light on. Found somewhere to pull over and ran Forscan, fault codes listed were, ABS U0401:00-A7 (invalid data from PCM),PCM P1264:00-A7 (cylinder 4 high to low side short) and P037D (glow plug sense circuit). Managed to limp home, later on disconnected battery, disconnect wiring from injectors and PCM checked wiring all ok, then measured resistance of injectors, no1 200k ohm, no 2 445k ohm, no3 200k ohm, no 4 0.747k ohm. From this assuming injector 4 has had it. Measured glow plug resistance 1,2 &3 0.8 ohm no 4 12.7k ohm so assume no 4 has had it. Not sure about the ABS fault at the hoping that will clear when the injector is replaced. Also not sure on the reading of injector no 2 but has been running great.

Both number 4 injector and glow plug going down at the same time is rare

I'd thoroughly check the engine harness wiring

I will double check the wiring, the glow plug fault has regularly appeared for a few months now.

I wouldn't trust a basic resistance test for modern Piezo injectors.  That could explain the anomaly on injector 2.

I think you right because it was running really well up to then but injector 4was well off. Have ordered an injector for no 4 and will see how that goes.

If you are not already using the windows version of FORScan with a vLinker FS cable then you need to. You will need it to be able to code the new injector.

On 4/7/2024 at 8:59 PM, unofix said:

FORScan (for use with Windows Laptop) : https://forscan.org/download.html

It's what many Ford owners use including some Ford technicians.

• vLinker FS, cable for laptop: https://www.amazon.co.uk/Vgate-vLinker-Adapter-FORScan-MS-CAN/dp/B0952P4MLP

OR

• OBDLINK EX, cable for laptop: https://www.amazon.co.uk/OBDLINK-EX-FORScan-OBD-Adapter/dp/B081VQVD3F/ref=sr_1_5

For diagnostic use only:

• vLinker FD, for android phone: https://www.amazon.co.uk/Vgate-Bluetooth-vLinker-Scanner-Diagnostic/dp/B08H82WC8L
• vLinker FD+, for iPhone: https://www.amazon.co.uk/Vgate-Bluetooth-vLinker-Scanner-Diagnostic/dp/B08H8JHWP2

 

I am thank you I have both laptop and phone versions.

So just to close this out, I double checked the wiring all ok. I then unplugged the injector to double check that it was the correct one, no 4 nearest the flywheel and it checked out correctly as I wasn’t 100% sure which way they were numbered as some info I had suggested it could have been the other end. Replaced injector and it started first time, left to tick over for a little while but when I tried to rev it a bit was quite rough, after a couple of minutes this got better so I decided to try and drive it. It was a bit rough between 1k and 2k revs but this gradually got better, drove for about 10 miles and now running well although I think I can hear a very slight injector knock at low revs, might just be that I was really listening to the engine with no radio on. Will give it a couple of days to make sure I’m happy and I will change the glow plug. Thanks for all you advise.