Hpi Pump On Engine

[coastline taxis]

Having just told another customer that he needs a high pressure pump 500 quid he didnt react at all (most burst into tears and call citroen horrible names). turns out hes a retired ships engineer. Anyway he asked us all about what the pump does and at what pressure etc etc. He then asked us to keep the car as he will be back with a pump that he intends to make over the weekend and have us fit monday as he reckons its no problem at all for a 12v electric pump to produce that pressure. So heres hoping

[myglaren]

I would certainly be interested to see how that turns out - academic interest only as mine is not an HPi and I have no plans to acquire one.

[coastline taxis]

I would certainly be interested to see how that turns out - academic interest only as mine is not an HPi and I have no plans to acquire one.

Me neither but ive told a few they need a pump. In my opinion you just cand beat the 2.0 hdi

[coastline taxis]

Me neither but ive told a few they need a pump. In my opinion you just cand beat the 2.0 hdi

Well the old fellow turned up today with his pump its of a boat its 12v and goes up to 5 bar. after blanking the cam of we got the pump sited for him connected it up and it works no bother at all.Now dont be jumping for joy as we had a few issues with him and the job is now at a stop after we refused to work on it over the following issues wich both sides have went away to consider for round 2 tomorrow

1 he wants us to wire it via a fused switch in the car straight from the battery. we refused on the ground that if there was a accident and fuel rail was damaged then the pump would continue to pump petrol out

2 he wants us to pick the power up from the wiring that goes to the low pressure pump in the tank again i refused as i have no idea wht effect this would have on the ecu or how it would work in the event of a accident

 

 

 

The car dosnt have a inertia cut off either. Now while this bloke has sort of solved the problem and i belive the pump will work and with a bit of fine tunning it will be safe.But at the moment id be leaving myself wide open to a claim.Spoke to citroen dealer and understandably he wanted absolutley no part in it.

So any one got any ideas on the wiring side of it

many thanks

steve

[kfk]

just bouncing an idea around here......up to you if you think its worth progressing:

 

The original pump provides pressure all the while the engine is running.....so its only means of shutting fuel of is if the engine stalls........so with the electric pump......how about using a split charging relay type setup so it takes a feed when the pump in tank is energised?

 

The low pressure pump recieves a supply for a few seconds on ignition on, and then again once the engine is started.....you could use this supply as a trigger for a suitable relay....fused close to the connection......using a rlay in this manner wouldnt pose a problem for the circuit as it is very low current draw.

 

A suitable power supply could be sourced from the 'bolt on' connector in the underbonnet fusebox.....again fused close to the connection.

 

In the event the engine cuts out (stalls) the power to the low pressure pump would cease, and so would the trigger for the high pressure pump....thus shutting it off.

 

What do you think?

[coastline taxis]

just bouncing an idea around here......up to you if you think its worth progressing:

 

The original pump provides pressure all the while the engine is running.....so its only means of shutting fuel of is if the engine stalls........so with the electric pump......how about using a split charging relay type setup so it takes a feed when the pump in tank is energised?

 

The low pressure pump recieves a supply for a few seconds on ignition on, and then again once the engine is started.....you could use this supply as a trigger for a suitable relay....fused close to the connection......using a rlay in this manner wouldnt pose a problem for the circuit as it is very low current draw.

 

A suitable power supply could be sourced from the 'bolt on' connector in the underbonnet fusebox.....again fused close to the connection.

 

In the event the engine cuts out (stalls) the power to the low pressure pump would cease, and so would the trigger for the high pressure pump....thus shutting it off.

 

What do you think?

[coastline taxis]

Im willing to try anything that anyone suggests as the pumps are only 40 quid to buy so its a hell of a saving. The pump does work and the engine runs fine at also sits nicely where the original pump goes and brings a 500 quid fix down to under a 100. Will order the bits today and get back to you

many thanks

steve

[beelim]

I thought that the high pressure pump on thr block was 150 bar and not 5.

[coastline taxis]

im affraid not the pressures for you parusale are

1.8i 16v= sagem s2000 injection system is 3.5 bar

2.0i 16v= mmarelli 48p2 injection system is 3.5 bar

2.0i 16v hpi = siemens sirius 81 injection system is 5 bar (this is the one we doing)

3.0i 16v = bosch me 746 injection system is 3.5 bar

[kfk]

Fuel pressure regulator (low pressure fuel circuit)

The low pressure regulator controls the pressure of the fuel in the low pressure circuit .

Circuit pressure : + 5 bar .

The low pressure regulator is fixed on the tank unit/fuel pump module .

 

High pressure fuel pump

An internal valve limits the pressure on the high pressure piping (specific rating = 130 bars)

 

Fuel high pressure regulator

The high pressure fuel varies between 30 and 100 bar .

 

I dont know of it being any different between models......after all 5 bar isnt really high pressure

[coastline taxis]

Fuel pressure regulator (low pressure fuel circuit)

The low pressure regulator controls the pressure of the fuel in the low pressure circuit .

Circuit pressure : + 5 bar .

The low pressure regulator is fixed on the tank unit/fuel pump module .

 

High pressure fuel pump

An internal valve limits the pressure on the high pressure piping (specific rating = 130 bars)

 

Fuel high pressure regulator

The high pressure fuel varies between 30 and 100 bar .

 

I dont know of it being any different between models......after all 5 bar isnt really high pressure

There you go we were both wrong

[kfk]

Must admit i hadnt noticed your comment about 5bar pressure.

[coastline taxis]

Must admit i hadnt noticed your comment about 5bar pressure.

just checked our data and it definatley states 3.5 and 5 bar. if you tell me how to then il copy and paste it on to the site or if you email me il send you a copy and you can see for yourself. We are at present pumping 5 bar through the rail and the engine is running

steve

[coastline taxis]

Hi finaly getting what i needed now can you tell me how to insert a image onto a posting and il put on the data stating that the pumps run on 5 bar. The job that we have done worked fine with the pump and with a little tunning on kfk suggestion( thanks for that) the car is now running and the old fella is over the moon. It has however lost a bit of its top end with the customer saying it starts to struggle at 90 but he couldnt give to hoots as it only cost him £150 in total

cheers steve

[coastline taxis]

Hi finaly getting what i needed now can you tell me how to insert a image onto a posting and il put on the data stating that the pumps run on 5 bar. The job that we have done worked fine with the pump and with a little tunning on kfk suggestion( thanks for that) the car is now running and the old fella is over the moon. It has however lost a bit of its top end with the customer saying it starts to struggle at 90 but he couldnt give to hoots as it only cost him £150 in total

cheers steve

this is page 185 of the data disc i have for a c5 and c8

[coastline taxis]

this is page 185 of the data disc i have for a c5 and c8

Hi thanks for that kfk

4th line down shows shows the pressure required

best regards

steve

[kingkenny33]

Did anything ever come of this pump as i think i need one on my 2001 2.0 hdi C5 and no way am i paying dealer prices!

 

It started make a noise under the bonnet a few months ago so had a friend check it for me and he said it sounded like it was coming from the fuel pump.

 

I rang Citroen the next day and was told it was appx £640 to which i replied i only needed a fuel pump not a whole engine, they wasn't amused.

 

Anyway its still running ok, noisy at low revs but not so bad as the revs rise but i'm only keeping it if i can get it done without selling a kidney!

[Bugatti]

Did anything ever come of this pump as i think i need one on my 2001 2.0 hdi C5 and no way am i paying dealer prices!

 

It started make a noise under the bonnet a few months ago so had a friend check it for me and he said it sounded like it was coming from the fuel pump.

 

I rang Citroen the next day and was told it was appx £640 to which i replied i only needed a fuel pump not a whole engine, they wasn't amused.

 

Anyway its still running ok, noisy at low revs but not so bad as the revs rise but i'm only keeping it if i can get it done without selling a kidney!

 

The fuel pump died on my dad's C5 Hpi 2.0 2002/3. I managed to buy a brand new pump from a car parts dealer in france (ebay) for £110 including postage. Looks identical to original citroen part and is working perfectly. Compared to citroen original part at approx. £475, this seems to be the way to go.

 

Bargain.