Hi I'm hoping someone can help as im at my wits end. Bought an xj 4ltr in december last year and got about 3 months out of it with no mechanical problems. Then while 4wd one day the cel came on with 0203 as the code. Drove to main road and it went away so thought it was a glitch. Stopped at shop on way home and when i started it back up the misfire was there again. Checked resistance on injectors and number 3 was at 14 ohms all others around 11. Managed to get it to repeat the misfire and checked harness with noid light and was ok so bought set of 784 bosch remanufactured injectors. Installed them and it ran great for about an hour then when I tried to restart was misfiring and pumping raw fuel out exhaust. Removed rail and injectors then primed pump and number 2 was stuck open. Removed injector and managed to unstick it with 9v battery. Reassembled today and still dumping fuel but no fault codes. I am way out of my depth and no idea how to check what could be wrong. Any advice massively appreciated

Read my recent post, It may be stuck open. I dont know if it did it the way a mechanic would but it worked.

First thing to do is to check your grounds. The injectors get 12v constantly and the PCM provides the ground path. If the ground path is flaky, bad things happen.

Check the cables AND the connections. See my sig, #1.