Fuel Pump

[chrisjcoe]

Hi all

Drove the S2 to work for the first time in a while, the pump was wailing away and drawing a lot of puzzled glances. It's about time I changed it. Avoiding the mail parts suppliers who want over £120 for a pump, ebay throws up a lot of options but, at less than a third of the price, are they suitable?

This one seems to be an original, not refurbed. I think Jay944 is offering me one of these too but I've been really slack in getting back to him (sorry).

This one is new and claims to be compatible with the S2.

This one is the same as the previous one.

What is the difference between the £40 pumps and the £120 pumps?

 

[barks944]

Shrug, a fuel pump is a pretty well understood thing. The £40 pumps will be made in china copies of the Bosch pumps I expect. Quality becomes an unknown factor but it is very likely to work maybe not as well or for as long as a Bosch pump but as long as it meets the flow rate required and fits you are only risking early failure.

 

[scam75]

I got a Sytec pump for my turbo, about £95 delivered with all appropriate fittings. A lot of the Jap boys run these pumps now and this one performs to Bosch 044 level or around 400bhp. I am sure it would work just fine on an S2 and supply you with a healthy amount of fuel for the forseeable future. Cheers Stuart

 

[Hilux]

ORIGINAL: chrisjcoe Hi all Drove the S2 to work for the first time in a while, the pump was wailing away and drawing a lot of puzzled glances. It's about time I changed it. [link=http://www.frazerpart.com/acatalog/911__3_2L___924S__944___968_fuel_pump.html]£120 pumps[/link]?

If your pump is old so is the pipework to it and also the fuel filter. Is the filter blocked? The pipework is exposed and normally left alone if it looks like it might disintegrate as its an awkward job to do. I would also allow for new pipework from tank to filter and filter to pump. I can recommend Sytec for after research I bought one on many recommendations from others - I have on in my Golf []

 

[chrisjcoe]

Just trying to work out what Sytec pump fits the s2 to get a price, I'm always keen on recommendations. Yes, the fuel lines are corroded (MOT advisory) but I'm in no position to change them at the moment. I am going to get a price from a couple of people to change them though. I am planning on doing a mini-service soon, so plugs, oil/fuel/air filter, oil, etc should be done in a month or two. The pump was whining like a <adult euphemism here> when I bought it, it's getting louder, so really want to change it before I'm left stranded by the side of the road. Would you worry that the new pump will go if I don't at least do the fuel filter at the same time?

 

[Mike_Pollock]

It may be noisy due to a knackered FPR..... Ask me how I know.....

 

[chrisjcoe]

ORIGINAL: A9XXC It may be noisy due to a knackered FPR..... Ask me how I know.....

FPR

Yeah, just read that on the Clarks site, noisy fuel pump is a symptom, good spot. It looks easy to change, but would you pull the pump fuse and run the engine until it dies to reduce the fuel pressure before disconnecting? I can pick a used one up for about £40 on ebay, which isn't great if I'm not sure if it's faulty or not.

 

[Hilux]

Just trying to work out what Sytec pump fits the s2 to get a price, I'm always keen on recommendations.

A noisy pump can simply be contaminated with cr*p and what you hear is cavitation (thrashing instead of flowing) in addition I would always fit a new filter if the age and condition of the old one is unknown as it could be 20 plus years old. One word of caution. I dont know if the 944 pumps are gravity fed or if they have a lift pump in the tank. Find out as some in line pumps are great for flow (head pressure) but dont lift fuel from a tank. Find out what constant pressure is required at the fuel rail and add at least 25% capacity and thats yer pump so I`d suggest you probably need at least a 4bar (but others may correct me) My Golf (ABF engine) needs 3 bar, I fitted a 6 bar Sytec (the fuel pressure relief valve bleeds off the excess) fed by an in tank lift pump with filter to a reservoir (so I dont get fuel starvation on corners when the tank is low) and on to an in line filter before the main pump. You can get Bosch equivalents or alternatives below (and elsewhere on line) [link=http://www.fuelpumpsonline.co.uk/bosch-replacement-pumps-30-c.asp]Bosch, Sytec or Walbro[/link]

 

[scam75]

http://www.ebay.co.uk/itm/PORSCHE-944-TURBO-911-924-928-MOTORSPORT-HIGH-PRESSURE-FUEL-PUMP-400BHP-MLR-EY-/120991850152?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item1c2bad1ea8 I would have thought this would do an S2 as well although it doesn't list it on the advert. Give the seller a call. This is the one I've got. Stuart

 

[944 man]

ORIGINAL: chrisjcoe

ORIGINAL: A9XXC It may be noisy due to a knackered FPR..... Ask me how I know.....

FPR

Yeah, just read that on the Clarks site, noisy fuel pump is a symptom, good spot. It looks easy to change, but would you pull the pump fuse and run the engine until it dies to reduce the fuel pressure before disconnecting? I can pick a used one up for about £40 on ebay, which isn't great if I'm not sure if it's faulty or not.

A new S2 FPR for £40? Remember that i] a FPR is a consumable item, so unless its recent its worth very little and ii] the S2 uses a 3.8BAR FPR which is different to the earlier models. Simon

 

[bmnelsc]

This month's Excellence magazine has a DIY article about changing 944 fuel pumps. They don't recommend a particular pump although I have seen one advertized with the insulating jacket (don't remember where so this isn't really helpful). Theirs is a race car so they installed without the jacket and used a short piece of radiator hose to take up the difference for the mounting clamp. At any rate - they recommend changing both rubber lines and checking/changing the "sock" filter in the fuel tank which is on the fitting that connects the fuel pump inlet line.

 

[944 man]

Scan? [] Always handy.

 

[zcacogp]

ORIGINAL: 944 man A new S2 FPR for £40? Remember that i] a FPR is a consumable item, so unless its recent its worth very little and ii] the S2 uses a 3.8BAR FPR which is different to the earlier models.

Exactly what I was thinking. If you know the Bosch part number you can google it, and the cheapest place on-line is around £80 or so. Euro Car Parts usually want about £120 for one, but if you call up their Porsche department then they will price-match if you ask very nicely. (You do need to be quite diplomatic and ask as nicely as possible if the on-line price is a lot lower than their advertised price.) Turbo/Lux ones are the wrong fuel pressure so, while they are available a LOT cheaper (I think it's a crossover part with some BMW's) they won't work. Oli.

 

[chrisjcoe]

quote: ORIGINAL: 944 man A new S2 FPR for £40? Remember that i] a FPR is a consumable item, so unless its recent its worth very little and ii] the S2 uses a 3.8BAR FPR which is different to the earlier models. Exactly what I was thinking. If you know the Bosch part number you can google it, and the cheapest place on-line is around £80 or so. Euro Car Parts usually want about £120 for one, but if you call up their Porsche department then they will price-match if you ask very nicely. (You do need to be quite diplomatic and ask as nicely as possible if the on-line price is a lot lower than their advertised price.)

Thanks for all the info guys. I'll up my price and get a good one, so will shop around and see what I can find. FPR is the first to be changed, if that doesn't stop the embarrassingly noisy fuel pump, then that's next to go.