mini cooper s (crank, no start) high pressure fuel pump fault 

The new pump was over £300 so I wanted to be sure that it needed it. The aftermarket pump that was already fitted to the car just didn't work. Thanks mate

Oh for sure they can, I helped a friend do his entire brake system on his 84 Land Rover, so it had new calipers, discs, pads, shoes, drums, brake lines, Servo, Master Cylinder and slave cylinders, so essentially, the whole system was brand new, and he was still getting problems with the pedal not feeling right after we had bled it up, we checked every brake line and it's fittings like about a 100 times, it turned out that it was the new master cylinder wasn't sealing properly inside, it was a bit of a nightmare, and had us scratching our heads for a while until we sussed it.

Thanks for watching

Thanks Robert

Thanks Jeremy

Thanks for watching Adi

Thanks sandy, the new high pressure fuel pump was over £300 so I wanted to be confident that it needed it. Cheers Matt

That's good to know, I haven't had a lot to do with the high pressure pump, most of the mini's I see don't have it. It seems the aftermarket pump that was already fitted was junk. Thanks mate

Thanks, a single channel graphing meter would work one channel at a time. Or maybe a multimeter that has duty cycle. It could be enough to know something is being controlled without the detail. Thanks for watching

Yes an eBay job I believe

Yes it was, it also didn't feel like the drive was connected to anything when I rotated it with my hand with the pump off the car, the new pump felt like parts were connected internally when I did the same thing with that. At over £300 for a new pump we wanted to make sure it was needed. Thanks mate

Seems like the high pressure is only getting low pump pressure. If you disconnect the low pressure fuel pump and you see if the pressure in the high pressure rail drops, then the sensor could be believable. Without a gauge it's Hard to prove the sensor is reporting the correct pressure.

@@mechanicmatt871 thanks Matt, I will try that. .

I think the same tests that I did in this video would show you if you are needing a high pressure fuel pump. I'm not sure what test equipment you may have. Maybe you could try a noid light on the high pressure fuel pump wire to see if it's being controlled. Thanks for watching.

@@mechanicmatt871 But we not have fuel pressure testing tool. Anyway thanks for your good support and replays for my message

That was the Launch x431 v

I used a launch scan tool to see the desired and actual high pressure cheers Matt

@@mechanicmatt871 do you happen to have a link? I need to view fuel pressure via obd

www.amazon.co.uk/LAUNCH-Bi-Directional-Diagnostic-Programming-Functions/dp/B01G5BA9LW/ref=mp_s_a_1_6?crid=1URSOM9AOKGKV&dchild=1&keywords=launch+diagnostic+tool&qid=1631256934&sprefix=launch&sr=8-6 This is the scan tool that I use, although other scan tools will also give you the information you need. As long as it's not an obd or eobd only code reader, it has to have manufacturers specific options too.