Metal_Detective
Member Since: 10 Nov 2018
Location: Earra-Ghàidheal
Posts: 50
  
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| Following Robbie's Guide To The Low Pressure Fuel System |
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Without going into all the gory details of my disco woes, today I set out to follow Robbie's guide.
The pump drew 3.3A on ignition and 4.4A with the engine running. So I'm thinking it's working but not all that hard.
Fuel pressure tested at just under 0.4 bar running and reliably dropped to under 0.3 bar under throttle with associated bongs and engine system fault messages. So I'm thinking the pump is definitely weak and not outputting enough to be regulated down to a steady 0.5 bar.
After testing, and just for a laugh, I ran the engine with fuse #1 removed so no power to the LPFP to see what would happen and the engine ran better: ran for 5 mins, up to 3500 revs with no bongs until rain stopped play. I still had the pressure gauge connected and it went to zero then into vacuum by 10psi running all the while.
What's going on here then? Without the LPFP fuse in I didn't think the car would run for more than a few seconds if at all. 2016 D4 SDV6 Landmark
2006 D3 TDV6 manual (deid)
2003 D2 TD5 manual on B100 (sold)
1998 300TDi manual (sold)
1994 300TDi manual (sold)
1972 Range Rover manual, Perkins engine (sold)
1966 S IIA truck cab, broke in half (sold as a kit)
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 18th May 2021 4:03 pm |
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Hardware
Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12711
 
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oooh! that might put paid to cmb2020's secret anti-theft circuit then ? .
Dean
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2011 D4 XS - OBD port protection, RLD spare wheel protector, All LED interiors lights, Timed Climate enabled, iiD tool paired.
2011 D4 Landmark - Stolen from same dealer before I paid for it
2011 D4 GS - Stolen whilst at dealer  ... All LED interiors lights, DRLs, Spare Wheel protector.
1996 300Tdi - Eaten by tin worms
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| 18th May 2021 4:18 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10367
  
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humm.
Maybe its used more to prime the system ?
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| 18th May 2021 4:32 pm |
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