To finish this one off, changing the pump.sorted the problem. There is a known problem with the seals on the throttle damper, which is a.plastic unit with a round covered diaphragm, from the outlet (top) of the pump to the delivery pipe out through the mounting disk. It turned out that the plastic outlet spigot on the pump had broken off - the edges of the two pieces showed that it had been cracked for a while, which probably led to a drop in pressure at the fuel rail. The car runs much better with a replacement pump (there had been a hesitation between 1500 and 2000 rpm which is now absent). I only found this on taking the pump and gauge sender to bits, as the two parts were pushed together by the assembly.... Chris
On Dec 22 2011, 4:02 pm, colin durnall <[email protected]> wrote: > I was talking to a chap who breaks XR2i's the other day and asked about fuel > pumps. He said that the major fault with them is a ' rubber' tube that > connects the pump to the metal tube fails. The fuel then just sprays into the > tank and does not go up the tube. Thats all I know, it may be right or it may > not be. > > ________________________________ > From: ChrisC <[email protected]> > To: Quantum Owners Group <[email protected]> > Sent: Thursday, 22 December 2011, 14:09 > Subject: [Quantum Owners] 1600 CVH EFI fuel; problem > > My 8v XR2i-based H4 isn't starting, and it's a fuel problem which > suddenly appeared last week. When you turn the ignition on, the pump > buzzes for about a second; if you do this 3 or 4 times, then turn the > engine over, it fires and runs for about 3 seconds, then stops as the > fuel in the rail runs out. The return pipe to the tank is empty, and > gurgles are heard if you disconnect it; similarly, there's a slight > hiss when the petrol cap is removed. > The fuel filter hasn't been changed in an unknown period, so that's > first on my list, then a check of all the flexible hoses in the flow > and return, although at a quick glance they're OK. > - Is this problem likely to be a fuel pump failure? > - Do any other pumps apart from the 8v 1600i XR2i pump work for the > 1600 EFI engine? (eg the 1800 Si pump) > - Can I get the pump/sender assembly out of the tank through the flap > under the back seat, or do I need to drop the tank? (It's half full at > the minute, so I'd rather not!) > Could it be an airlock in the return pipe? > > Best regards > Chris > > -- > You received this message because you are subscribed to the Google Groups > "Quantum Owners Group" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group > athttp://groups.google.com/group/quantumowners?hl=en > > IMPORTANT NOTE: All information presented herewith is provided on an "As Is" > basis, without warranty or the implication thereof. Neither the Quantum > Owners Club nor the individuals associated with the Quantum Owners Club or in > the preparation of the above information shall have any liability to any > person or entity with respect to liability, loss, or damage caused or alleged > to be caused directly or indirectly by the instructions contained within this > or related message(s). -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s).
