problem after new UB pump!

smudge.g · 29th February 2020, 07:42

I changed my troublesome UB pump on my CDTi a few days ago, would have been much easier to do if they had given us a few more inches of pipe underneath. Instead it took over an hour just to get battery/tray out!!

Anyway, after replacing the pump (one from Mgrs and slightly more louder than the old one) the car wont fire up immediately on first turn of the key as it has done since I've had it. i can hear the pump working but simply wont fire straight away. I now have to turn on ignition, leave for 20-30s, turn off, repeat 3 or 4 times before it will fire up. After that, no problems and even starts again if I turn it off. It seems as if I'm losing fuel pressure over time but I only removed the fuel pipes top and bottom of pump, nothing else.

The only slight change was replacing bottom pump hose clip with a sprung version as the one that came off was one of those crimped on ones. Could this be causing a drop in pressure? cant see any fuel leaks anywhere. I am planning to also replace the intank pump setup with the one from my scrapper which the owner said was new, i dont think mine has worked for a while. Im guessing this will help take workload off UB one! Thanks for reading.

29th February 2020, 07:42	#1
smudge.g Gets stuck in 75 Tourer CDTi Connie SE Join Date: Jun 2017 Location: Keith, Banffshire Posts: 686 Thanks: 431 Thanked 132 Times in 105 Posts	problem after new UB pump! I changed my troublesome UB pump on my CDTi a few days ago, would have been much easier to do if they had given us a few more inches of pipe underneath. Instead it took over an hour just to get battery/tray out!! Anyway, after replacing the pump (one from Mgrs and slightly more louder than the old one) the car wont fire up immediately on first turn of the key as it has done since I've had it. i can hear the pump working but simply wont fire straight away. I now have to turn on ignition, leave for 20-30s, turn off, repeat 3 or 4 times before it will fire up. After that, no problems and even starts again if I turn it off. It seems as if I'm losing fuel pressure over time but I only removed the fuel pipes top and bottom of pump, nothing else. The only slight change was replacing bottom pump hose clip with a sprung version as the one that came off was one of those crimped on ones. Could this be causing a drop in pressure? cant see any fuel leaks anywhere. I am planning to also replace the intank pump setup with the one from my scrapper which the owner said was new, i dont think mine has worked for a while. Im guessing this will help take workload off UB one! Thanks for reading. __________________ My 75 Tourer CDTi was born Saturday, 21st June 2003 @ 09:50 My 75 was the 18,749th 75 Tourer to run off the production line, out of 27,407 It was the 195th 75 Tourer CDT Connoisseur SE (135) to be made out of 2,074 and the 1,789th 75 Tourer in Wedgewood Blue Metallic (code: JEL) to be made out of 1,871 Wedgewood Blue Metallic 75 Tourers