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Author Subject: 044 pump killing engine
pugheaven

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Location: Fareham

Registered: 17 Dec 2006

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Post #1
Right so today has been a pain in the arse!

Tried to start the dimma and it was not having any of it Thumbs down

Rich came round before he headed off on his holiday and we tried a few things.

If the high pressure pump is not electrically connected the car fires into life, as soon as I put power to the 044 the engine cuts out!

I have then powered the pump directly from the battery and earthed it back to the battery to illuminate that and still the same problem!

I then disconnected the fuel lines to the rail, with just the in tank pump working I get a flow of fuel to the rail, I then connect the 044 electrically and the flow increases so the routing is correct

What else can cause the engine to die when the high pressure pump is connected

Posted 21st Mar 2015 at 19:21
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #2
got a wideband on it?

is it a fixed pressure regulator?

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Posted 21st Mar 2015 at 19:30
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bigbadbowen

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Location: Winchester

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Post #3
So it's over fueling then ollie ? What presure are you running at bud ?
Posted 21st Mar 2015 at 19:36
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pugheaven

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Post #4
I have got a wide band but we think it's faulty! If it's cutting out due to overfueling surely it wouldn't gut out within a split second of connecting the pump
Posted 21st Mar 2015 at 19:52
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pugheaven

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Post #5
Its got a fixed 5 bar fpr the same as was fitted when it was running before
Posted 21st Mar 2015 at 19:53
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superchargedblack1997gti6

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Location: guildford

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Post #6
Could be that the fuel pressure regulator has failed and is not able to regulate I think

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Posted 21st Mar 2015 at 20:02
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #7
what makes you think the wideband is faulty?

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 21st Mar 2015 at 20:12
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superchargedblack1997gti6

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Post #8
Because it gave some very funky readings I believe?

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Posted 21st Mar 2015 at 20:15
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pugheaven

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Post #9
Well it was only ever reading 14.5 and never moved, rich was mainly keeping an eye on it so not 100% but considering it was only running off the in tank pump I would imagine it was running mega lean and the gauge didn't show this
Posted 21st Mar 2015 at 20:27
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #10
depends what pump you have in the tank, it was probably pumping enough for the ecu to get a good clean idle without the 044.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 21st Mar 2015 at 20:38
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buzzbrightyear

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Registered: 09 Jul 2008

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Post #11
Shouldn't the pressure regulator stop the fuel rail from been under too much pressure?

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Posted 21st Mar 2015 at 20:50
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superchargedblack1997gti6

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Post #12
Yes that's what points me to a faulty pressure regulator. How well does the regulator seat in the fuel rail?

________________________________________

Super high boost Completed, destroyer of gearboxes and 160mph club
Posted 21st Mar 2015 at 20:51
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pugheaven

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Post #13
Just the standard in tank pump, I thought the regulator would only allow 5 bar of pressure but not sure?
Iv put a video on Facebook of what happens
Posted 21st Mar 2015 at 20:52
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pugheaven

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Post #14
It seats fine with the securing clip in place
Posted 21st Mar 2015 at 20:54
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pete_rallye

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Post #15
If you give a regulator too much pressure in one go they can lock up and not let anything through at all, certainly something I would look at.

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Posted 21st Mar 2015 at 21:13
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pugheaven

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Post #16
But if I try and start the car with both pumps running it won't start at all and just floods it
Posted 21st Mar 2015 at 21:16
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superchargedblack1997gti6

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Post #17
I think you should look at both the fuel pressure regulator and the fuel return line? I have a 4 bar fpr I'll bring down tommorrow mate just to check?

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Posted 21st Mar 2015 at 21:24
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pete_rallye

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Post #18
Sounds strange, I'm not convinced you should get a flow of fuel to the rail with just the in tank pump running. In theory the pressure should be the same at the flow and return pipes in the swirl pot so no flow should take place to the fuel rail.

It could just be that there is masses too much fuel been fired in for the amount of air going in?

________________________________________

Oulton Park in a BTCC 306 vid 1
Oulton Park in a BTCC 306 vid 2
Lap of the 'ring
Posted 21st Mar 2015 at 21:25
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pugheaven

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Post #19
I was a bit mythed about that too and so was rich, Carl chambers said his wouldn't run with just the in tank pump running!
Posted 21st Mar 2015 at 21:27
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pete_rallye

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Post #20
I guess you will get a pressure drop on the flow because the injectors are firing, and if the pressure in the pot is a bar or so then you'll get the same at the rail, which is probably enough for a clean idle. Does it rev at all with the in tank pump running? Ideally you could do with hooking up a fuel pressure gauge to see whats going on.

________________________________________

Oulton Park in a BTCC 306 vid 1
Oulton Park in a BTCC 306 vid 2
Lap of the 'ring
Posted 21st Mar 2015 at 21:30
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pugheaven

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Post #21
Would the negative pressure caused by the engine turning over not cause suction and draw the fuel from the rail, does the pump allow fluid to pass through it when its not powered??,
Posted 21st Mar 2015 at 21:30
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pugheaven

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Post #22
Yup you can rev it but rich has said to be careful and not do it cause it's obviously running lean, I do need a gauge but dont have one and dont know anyone with one!
Going to order one and see what's going on with the supply and return pressure

Going to check the return line tomorrow

Ross that would be great if you could bring you regulator
Posted 21st Mar 2015 at 21:33
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #23
why 5bar btw? that seems rather excessive

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 21st Mar 2015 at 21:43
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bigbadbowen

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Location: Winchester

Registered: 21 Nov 2003

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Post #24
So car cuts out the instant you put power to the pump ? Or does it run for a second or 2 then cut out ?
Posted 21st Mar 2015 at 21:43
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

Status: Offline
Post #25
why 5bar btw? that seems rather excessive

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 21st Mar 2015 at 21:43
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