Rough Running pt3 - new fuel pressure regulator | Mercedes 220CE W124 coupe | Not A Proper Classic 

Thanks @nakebmohammedi for the tip. I didn’t do that - but I had left the car off and not run it for a few days before. I’d read that leaving it to stand will allow any pressure to fall. I didn’t have any issues luckily. Other than not tightening up the clip properly so when I did run it for the first time it spewed petrol everywhere! I quickly realised and the made sure it was fitted correctly. No issues now!

do you know what the exact fuel pump relay is for this car, as I have the same one.?

@@Gary-GKJ afraid not on the fuel pump relay. I’d have to double check on the car or the workshop manual.

@@Beechams1042 thank you that would be very helpful, really appreciated

Thanks - I’ll also take a look. Also think the throttle body spring could do with a clean and lubrication.

@@Beechams1042 your wiring looks ok…peel back around the front and injector’s and see if any copper is showing,.,., sometimes a complete loom is not needed.. Have you replaced the fuel pump.? When was the plugs and coils changed??

@@redpig1120 the loom needed doing. The wiring had degraded as I doubled checked it before removal. The spark plugs were done two years ago and will be done soon on the next service. Fuel pump seems fine - and it’s definitely sending fuel through but I’ll change the fuel filter as part of the service.