1.8T/260 Fuel Pump 4.5 BAR Suitable Alternatives WFX000290

Lovel · 2nd October 2013, 11:42

Petrol 1.8 Turbo or 260 with in tank fuel pump rated at 4.5 BAR WFX000290

Has anyone ever changed out the OE fuel pump assembly to an alternative type of pump before ?

T-Cut · 2nd October 2013, 12:09

I've not read about fitting an alternative petrol pump thus far. They don't seem to give that sort of problem, but I guess they will fail eventually.

TC

Lovel · 2nd October 2013, 18:48

Before I remove the pump unit from the fuel tank I ran a pressure test with engine at idle and obtained 2.8 BAR.

I'll take it for a run and monitor pressures from there under load as this is where the misfiring is occurring.

Have checked the Filter pot too and it is secure, but someone had been in there before in past as they had not fitted the seal for it was lying on bottom of tank.

The filter pot includes a regulator which should regulate the pump to 4.5 BAR, and the damper in the manifold smooths things out at the injetcors

A few things for close investigation:
-Failing pump
-Leak between pump and filter pot
-Pressure regulator in filter pot
-Pressure damper at inlet manifold

Lovel · 2nd October 2013, 22:04

The pump manufacturer is VDO, printed on the top of it is B05003 F171
and on it's side 993784032 05203 H4670.

https://www.merlinmotorsport.co.uk/p...032-vdo-itp331

T-Cut · 2nd October 2013, 22:08

Are you saying the delivery pressure is too low because of the regulator setting? The pump output is typically 50psi (3.3 Bar) so it's not far off.

I'd suggest it's more likely to be FFS than a bad pump. The displaced seal suggests it's happened before and you haven't mentioned the orange clip. Even if the seal was replaced, FFS will recur (even more easily than before) unless the FOC is fitted.

TC

Lovel · 2nd October 2013, 22:09

The filter housing did not look too pretty either with black gunge floating around the bowl.

The filter looked horrid too.

The 4.55 bar pressure regulator

Lovel · 2nd October 2013, 22:15

Quote:

Originally Posted by T-Cut

Are you saying the delivery pressure is too low because of the regulator setting?

TC

The regulator on the filter housing is printed with 4.55 bar, so seems to be correct version.

On my gauge with engine running I get 2.8 bar with engine running at idle/no load.

Not sure if regulator is opening too early or the fuel pump is the problem or leaking internal tank hose between pump, regulator or filter.

One thing I noticed is the in the bottom of the swirl pot for the fuel pump there is an annular space with a fine gauze all around the pump intake point. The gauze is mostly covered in black gunge material, but will be really hard to clean out due to it's shape, perhaps i just clean everything out as best as I can and fit a new filter and establish what pressure I get after this ?

GeraintUK · 2nd October 2013, 22:15

what model of engine is this from ?

On the 1.8T I thought the regulator on the inlet manifold was 3 bar so anything at pump end over that or thereabouts would be within tolerance ?

Lovel · 2nd October 2013, 22:16

Quote:

Originally Posted by GeraintUK

what model of engine is this from ?

On the 1.8T I thought the regulator on the inlet manifold was 3 bar so anything at pump end over that or thereabouts would be within tolerance ?

1.8T

The thingy on the end of the manifold is a damper.

The 4.55 bar regulator is at the bottom of the filter housing.

According to RAVE the fuel pressure check is made with engine running.
NASP 1.8 gauge reading at idle 3.5 bar based on the regulator fitted in tank.
Turbo 1.8T gauge reading at idle 4.45 bar.
.

Lovel · 2nd October 2013, 22:35

Quote:

Originally Posted by T-Cut

I'd suggest it's more likely to be FFS than a bad pump. The displaced seal suggests it's happened before and you haven't mentioned the orange clip. Even if the seal was replaced, FFS will recur (even more easily than before) unless the FOC is fitted.

TC

Could be possible too as other hands have been in before me. Will look closely at o-rings/sealing surfaces and possibly go for new filter seal kit then take another pressure reading.

The orange clip was never fitted, I found the housing half backed off, but not lying in bottom of tank though.

The fuel tank is on about a 1/4 full, and I noticed that the R/H side of the tank has most of the contents. The filter housing side of the tank has virtually nothing in bottom. Shouldn't they be equal levels?

2nd October 2013, 11:42	#1
Lovel I really should get out more....... P6B, L550, Imp, F56, Commando Join Date: Nov 2006 Location: Aberdeenshire Posts: 2,886 Thanks: 352 Thanked 677 Times in 440 Posts	1.8T/260 Fuel Pump 4.5 BAR Suitable Alternatives WFX000290 Petrol 1.8 Turbo or 260 with in tank fuel pump rated at 4.5 BAR WFX000290 Has anyone ever changed out the OE fuel pump assembly to an alternative type of pump before ?

2nd October 2013, 18:48	#3
Lovel I really should get out more....... P6B, L550, Imp, F56, Commando Join Date: Nov 2006 Location: Aberdeenshire Posts: 2,886 Thanks: 352 Thanked 677 Times in 440 Posts	Before I remove the pump unit from the fuel tank I ran a pressure test with engine at idle and obtained 2.8 BAR. I'll take it for a run and monitor pressures from there under load as this is where the misfiring is occurring. Have checked the Filter pot too and it is secure, but someone had been in there before in past as they had not fitted the seal for it was lying on bottom of tank. The filter pot includes a regulator which should regulate the pump to 4.5 BAR, and the damper in the manifold smooths things out at the injetcors A few things for close investigation: -Failing pump -Leak between pump and filter pot -Pressure regulator in filter pot -Pressure damper at inlet manifold Last edited by Lovel; 2nd October 2013 at 19:14..

2nd October 2013, 22:08	#5
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Are you saying the delivery pressure is too low because of the regulator setting? The pump output is typically 50psi (3.3 Bar) so it's not far off. I'd suggest it's more likely to be FFS than a bad pump. The displaced seal suggests it's happened before and you haven't mentioned the orange clip. Even if the seal was replaced, FFS will recur (even more easily than before) unless the FOC is fitted. TC Last edited by T-Cut; 2nd October 2013 at 22:19..

2nd October 2013, 12:09	#2
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	I've not read about fitting an alternative petrol pump thus far. They don't seem to give that sort of problem, but I guess they will fail eventually. TC

2nd October 2013, 22:04	#4
Lovel I really should get out more....... P6B, L550, Imp, F56, Commando Join Date: Nov 2006 Location: Aberdeenshire Posts: 2,886 Thanks: 352 Thanked 677 Times in 440 Posts	The pump manufacturer is VDO, printed on the top of it is B05003 F171 and on it's side 993784032 05203 H4670. https://www.merlinmotorsport.co.uk/p...032-vdo-itp331

2nd October 2013, 22:09	#6
Lovel I really should get out more....... P6B, L550, Imp, F56, Commando Join Date: Nov 2006 Location: Aberdeenshire Posts: 2,886 Thanks: 352 Thanked 677 Times in 440 Posts	The filter housing did not look too pretty either with black gunge floating around the bowl. The filter looked horrid too. The 4.55 bar pressure regulator

2nd October 2013, 22:15	#8
GeraintUK Passed Away MG ZT-T 160 Join Date: Feb 2009 Location: Chester Posts: 1,307 Thanks: 64 Thanked 222 Times in 145 Posts	what model of engine is this from ? On the 1.8T I thought the regulator on the inlet manifold was 3 bar so anything at pump end over that or thereabouts would be within tolerance ?