hollowpockets you say...
Discussion
As you guys know my car has been running 3 days since rebuild, today I have just fixed problem 3. On fire up the starter was f
ked. Replaced, 5 minutes running snapped the auxiliary belt then yesterday my car kept trying to cut out. Replaced another bosche 044 for the 3rd one in 18.months! I am determined to get this beast to yellowshed! 
If you didn't know me from the TVR fold you'll now understand the name...
HP over and out.
ked. Replaced, 5 minutes running snapped the auxiliary belt then yesterday my car kept trying to cut out. Replaced another bosche 044 for the 3rd one in 18.months! I am determined to get this beast to yellowshed! If you didn't know me from the TVR fold you'll now understand the name...
HP over and out.
I went though a spate of shredding about 4 alternator belts in rapid succession and this occurred after my engine/gearbox had been taken out/replaced. The problem was the recommended 1700mm belt was just too long. An easy way to tell is to see how much play there is in the tensioner. If when you put a new belt on the tensioner is sitting right on the end-stop it is basically too long; it won't be able take up any slack when the belt gets hot and expands and so you will need to put a shorter belt on (or put some shims on the alternator, which has the same effect of 'shortening' the belt). I replaced the 1700mm with a 1693mm belt and although it was a bit of pig to get on, I haven't heard a squeak from it since (replaced about a year ago).
Lakelord said:
You're certainly having your share of bad luck Graham. Not heard of quality issues on the fuel pump but there has been lots of chat regarding the auxiliary belt. Have you fitted a Gates belt? This seems like the only one that really works long term - part number 6pk1708.
Im on my third 044, the second one lasted around 2 months max, I've sent it back to Bosch for investigation.
TuxMan said:
Stupid question ....have you got a filter inline before the pump ?? could they be getting crap in them ?
Nope I do not but, I have replaced all the fuel pipes and emptied the tank and inspected it with an endescope and it's as clean as a babys bott, also the filter downstream of the pump is 'as clean as' too.
My last one failed after Yellowshed had it on the dyno,it was supplying the set pressure all evening, then on the last run the pressure dropped alarmingly. I also have the wiring mod etc and have checked that all out as well.
I certainly do not trust them now as this was probably the cause of my engine woes originally, and will be fitting an AFR gauge in the not to distant future.
Hey Steve, thought I was the only one having 044 pumps failing on me. The sparky at work thinks the car is building up static which can cause the current to surge and fry things. Not sure what can be done to cure it though. When it was on dastek rollers the car was freezing their dyno software and extra earths were needed from the chassis to the dyno rig.
I believe the problem with failing is with the fuel return to the tank being too small.The pressure regulator bypasses so much fuel back to the tank through the little return.If you disconnect the pipe at the exit of the pressure regulator the pump runs much quieter and there fore probably cooler I would think too. I suspect this is not an issue with the standard pumps. All IMO and yet to be totally proven but hope to get round to it as some point !
... pick my petrol tank up tomorrow as had it modified, wonder if i should increase the size of the return to the tank while its out!
Just a few thoughts as I've not experience this yet, but the Bosch 044 is an extremely powerful pump! Way too powerful (IMHO) to be running cars with only 400ish BHP?
I'm fairly sure mine is a Bosch 710 and at least one I've seen before was too?
The power consumption (amps) for this is markedly lower too with only marginal loss in outright flow capability.
An external Walboro pump will be sufficient I would say?
The problem could also be that if a fuel pump is too powerful, they cant pull fuel in through the pump inlet fast enough, this causes a pressure drop at the intake and the pump then cavitates and draws in air. This causes progressive pump deteriotion and hampers the pumps ability to flow fuel.
Edited to add that running 2 fuel pumps, especially 044's will overpower the fuel pressure regulator, not to mention the considerable heating effect it would have on the fuel.
Mike.
I'm fairly sure mine is a Bosch 710 and at least one I've seen before was too?
The power consumption (amps) for this is markedly lower too with only marginal loss in outright flow capability.
An external Walboro pump will be sufficient I would say?
The problem could also be that if a fuel pump is too powerful, they cant pull fuel in through the pump inlet fast enough, this causes a pressure drop at the intake and the pump then cavitates and draws in air. This causes progressive pump deteriotion and hampers the pumps ability to flow fuel.
Edited to add that running 2 fuel pumps, especially 044's will overpower the fuel pressure regulator, not to mention the considerable heating effect it would have on the fuel.
Mike.
Edited by Mike Tuckwood on Saturday 27th February 16:10
Mike Tuckwood said:
An external Walboro pump will be sufficient I would say?
Mike.
Mike, have you used Walbro in other applications, found them reliable etc?Mike.
In your opinion, would this one be a suitable alternative to the Bosch pump?
http://www.fuelpumpsonline.co.uk/walbro-255lph-ext...
Lakelord said:
Mike Tuckwood said:
An external Walboro pump will be sufficient I would say?
Mike.
Mike, have you used Walbro in other applications, found them reliable etc?Mike.
In your opinion, would this one be a suitable alternative to the Bosch pump?
http://www.fuelpumpsonline.co.uk/walbro-255lph-ext...
Mike
Mike Tuckwood said:
Lakelord said:
Mike Tuckwood said:
An external Walboro pump will be sufficient I would say?
Mike.
Mike, have you used Walbro in other applications, found them reliable etc?Mike.
In your opinion, would this one be a suitable alternative to the Bosch pump?
http://www.fuelpumpsonline.co.uk/walbro-255lph-ext...
Mike
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