Walbro fuel pumps
Discussion
Hi all,
I have a "Walbro" 255 inline pump fitted to my car, and on my first outing with it, the pump noise has changed from a constant high pitch tone, to a much lower tone.
When the pump was first fitted the fuel pressure climbed quickly, and the fuel pressure regulator could be heard bypassing within the ECU fuel pump prime period. Now the pressure regulator can only be heard bypassing during a second priming period.
The noise change, and what would seem to be a reduced flow, suggests to me that the pump speed has dropped - in effect it has failed but not entirely.
I've just done a bit of digging on the internet, and it would seem thre are a large number of chinese forgeries in circulation - I wonder if I've unwittingly bought one of them, and now I'm paying the price.
I wonder if the contents of the link below should be believed.
http://www.fuel-pumps.net/walbro-forgeries.html
Any thoughts?
I have a "Walbro" 255 inline pump fitted to my car, and on my first outing with it, the pump noise has changed from a constant high pitch tone, to a much lower tone.
When the pump was first fitted the fuel pressure climbed quickly, and the fuel pressure regulator could be heard bypassing within the ECU fuel pump prime period. Now the pressure regulator can only be heard bypassing during a second priming period.
The noise change, and what would seem to be a reduced flow, suggests to me that the pump speed has dropped - in effect it has failed but not entirely.
I've just done a bit of digging on the internet, and it would seem thre are a large number of chinese forgeries in circulation - I wonder if I've unwittingly bought one of them, and now I'm paying the price.
I wonder if the contents of the link below should be believed.
http://www.fuel-pumps.net/walbro-forgeries.html
Any thoughts?
All I can say is "wow"
It is scandalous what some people will do. First it was turbos, no fuel pumps.
Where did you buy yours ? Genuine Walbros are very very reliable, and I havent heard of one failure yet.
To the extent that Walbro actually stopped offering a warranty on the pumps. Now that may sound odd. But they were getting a lot of pumps returned for inspection, that had failed due to things like damage from dirt from not using a pre-filter.
Or other mechanical damage.
They figured it was better to reduce the price overall, and forget about warranty, as inspecting lots of pumps costs money, and they said the number of actual faulty pumps, was all but zero.
Given how cheap they really are.....I'd only buy from genuine trusted dealers. Although I never knew there were forgeries going about !!!!
It is scandalous what some people will do. First it was turbos, no fuel pumps.
Where did you buy yours ? Genuine Walbros are very very reliable, and I havent heard of one failure yet.
To the extent that Walbro actually stopped offering a warranty on the pumps. Now that may sound odd. But they were getting a lot of pumps returned for inspection, that had failed due to things like damage from dirt from not using a pre-filter.
Or other mechanical damage.
They figured it was better to reduce the price overall, and forget about warranty, as inspecting lots of pumps costs money, and they said the number of actual faulty pumps, was all but zero.
Given how cheap they really are.....I'd only buy from genuine trusted dealers. Although I never knew there were forgeries going about !!!!
Might be worth take a quick look at your electricals, if its anything like a bosch 044 - they draw a fair amount of current.
Put a digital volt meter across the terminals when its running and compare that to your battery voltage.
Ideally, you should do it with the engine not running as this will force it to maximum pressure (assuming non forced induction) which will be max current draw. But you will need to get the pump running somehow with the engine off.
You can use a syringe in the FPR vac line to simulate vacuum and boost.
Put a digital volt meter across the terminals when its running and compare that to your battery voltage.
Ideally, you should do it with the engine not running as this will force it to maximum pressure (assuming non forced induction) which will be max current draw. But you will need to get the pump running somehow with the engine off.
You can use a syringe in the FPR vac line to simulate vacuum and boost.
Cheers for the replies. The wiring is man enough for the task, and the lift pump that is one the same circuit is working fine.
The pump makes the pressure, but much slower than it used to, so I'm pretty sure it's partially failed.
Going on the wealth of information on the 'net concerning cheapo fake Walbro pumps, and mine was notably cheaper than most outlets, I think I've got a looky-likey!
Ho hum.
Anyone know a good UK based supplier of Bosch pumps?.....
The pump makes the pressure, but much slower than it used to, so I'm pretty sure it's partially failed.
Going on the wealth of information on the 'net concerning cheapo fake Walbro pumps, and mine was notably cheaper than most outlets, I think I've got a looky-likey!
Ho hum.
Anyone know a good UK based supplier of Bosch pumps?.....
alackofspeed said:
Cheers for the replies. The wiring is man enough for the task, and the lift pump that is one the same circuit is working fine.
The pump makes the pressure, but much slower than it used to, so I'm pretty sure it's partially failed.
Going on the wealth of information on the 'net concerning cheapo fake Walbro pumps, and mine was notably cheaper than most outlets, I think I've got a looky-likey!
Ho hum.
Anyone know a good UK based supplier of Bosch pumps?.....
Sytec are the obvious choice for Walbro or Bosch although not always the cheapest.. But Bosch have literally hundreds of outlets scattered around the country. Pretty much any decent motor factors should be able to get them.The pump makes the pressure, but much slower than it used to, so I'm pretty sure it's partially failed.
Going on the wealth of information on the 'net concerning cheapo fake Walbro pumps, and mine was notably cheaper than most outlets, I think I've got a looky-likey!
Ho hum.
Anyone know a good UK based supplier of Bosch pumps?.....
http://www.fuelsystem.co.uk/
Or the likes of Demon Tweeks etc sell their stuff.
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