SCV

[D1obl]

Hi all looking for some advice on a SCV

I have been having the normal symptoms of a broken scv and prv. I started naively by Installing eBay parts inc pressure sensor. This worked for circa 3 days. I done no software work simply changed the parts.

I then done some research. I then bought the PF Jones parts, retaining the eBay pressure sensor.
The van wouldn’t start. I then put the eBay prv on and boom it started. I then wiped the counters done the pump and pilot injector learns.

It worked for a period maybe 400 miles or so. Then boom back to the drawing board.

I then bought a ford prv. The van ran after installing this done the counter rest and pilot injector learn. Got around 80 miles then boom. Problems again

Done more research. Had to refit the eBay prv to get the van running as it would not start on the ford prv, got it to a ford garage to get the pcm updated. That was successful

I then got the counters rest pump and pilot injector learns done and all was well for 150 miles. During this time I watched the fuel rail pressures perfectly mirroring the expected. Then again boom van has thrown a fault code saying the prv is guff

Ford are happy to replace the prv. A new ford scv is £170.

I can get a impex scv for £69, my first question is is this a good part ?

Second question is what can I do here do I need 2 new parts counter rests and pump
Learns again ?

It’s worth noting, I also changed the fuel filter and can see some air in the fuel line going to the pump could this be air locking ? I noticed there is a little pump on the fuel filter housing is this to prime? If not how would I prime this ? I’ve been using a topdon unit for the counter resets and relearns is dying they have been completed successfully.

Reading van tuner it seems my issue may be with the injectors I’m happy to spend money on the van but it seems hopeless at the moment seems like a never ending circle. Any advice would be much appreciated.

[knobby1]

Hi all looking for some advice on a SCV

I have been having the normal symptoms of a broken scv and prv. I started naively by Installing eBay parts inc pressure sensor. This worked for circa 3 days. I done no software work simply changed the parts.

I then done some research. I then bought the PF Jones parts, retaining the eBay pressure sensor.
The van wouldn’t start. I then put the eBay prv on and boom it started. I then wiped the counters done the pump and pilot injector learns.

It worked for a period maybe 400 miles or so. Then boom back to the drawing board.

I then bought a ford prv. The van ran after installing this done the counter rest and pilot injector learn. Got around 80 miles then boom. Problems again

Done more research. Had to refit the eBay prv to get the van running as it would not start on the ford prv, got it to a ford garage to get the pcm updated. That was successful

I then got the counters rest pump and pilot injector learns done and all was well for 150 miles. During this time I watched the fuel rail pressures perfectly mirroring the expected. Then again boom van has thrown a fault code saying the prv is guff

Ford are happy to replace the prv. A new ford scv is £170.

I can get a impex scv for £69, my first question is is this a good part ?

Second question is what can I do here do I need 2 new parts counter rests and pump
Learns again ?

It’s worth noting, I also changed the fuel filter and can see some air in the fuel line going to the pump could this be air locking ? I noticed there is a little pump on the fuel filter housing is this to prime? If not how would I prime this ? I’ve been using a topdon unit for the counter resets and relearns is dying they have been completed successfully.

Reading van tuner it seems my issue may be with the injectors I’m happy to spend money on the van but it seems hopeless at the moment seems like a never ending circle. Any advice would be much appreciated.

Firstly....welcome..!

Secondly, you haven't told us what model transit you have..?? We know it's a Euro-4 but is it a 2.2 FWD or 2.4 RWD..??

Cheap ebay SCV's and PRV's are known not to work well and often fail the learns or not last well.

If you have air in the system, no amount of tuning and replacing valves will help. You need to find the source of the air leak and repair it, injector leak-back O-rings and their lines, fuel filter housing and the lines attached to it are common sources of air ingress.

The "little pump" on the fuel filter housing is not a pump or primer, it's a filter blockage indicator, pumping it does nothing but reset the indicator. Mk7 engines are self priming but if there is air in the system, they don't work well.

If the learns are completing successfully, your injectors are ok. Are you getting any fault codes..?? EGR ok..?? Refit the original fuel rail pressure sensor, they rarely fail and aftermarket ones can cause issues.

Lord Knobrot

[andz327]

And what do you mean by BOOM
why did you replace parts in first place
Is your new filter genuine
Have you pushed filter up far enough into housing and in locked position?????

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[D1obl]

Thanks gents. Appreciate the feedback so far. Seems I have a knack of buying high maintenance cars but at least the forums give you the opportunity to meet new people all experiencing the same rubbish as you.

So “boom” in this instance is it going wrong again Or reverting back to the original symptoms of no power cutting out not starting. From what I read online the standard symptoms of scv prv problems.

Apologies it’s a 2.2 fwd 2009.

When I first got the van it was sold with a fuelling issue. At the time I didn’t know it plagued these vans and jumped in anyway.

So the timeline above is where I’m at

It has had multiple codes however, The most recent code is 089 which I believe in fuel pressure regulator. Since doing the PCM update I’ve had a “take off power” fault (I’m paraphrasing, as I cannot remember the exact wording. Reading into this seems a common feature of the newest pcm update. This fault doesn’t seem to have stopped the learns from completing. I’ve done some more work since posting and I found the pressure sensor on the end of the rail I changed for the cheap parts originally only comes with the rail from ford.

Thankfully a family friend was able to give me a rail with the pressure switch(sensor) and the prv which he knows works.

So my weekend work is fit this.

Thanks for the advice on the fuel lines I noticed this the other day as the lines are clear and thought it didn’t seem right. I know one of the injectors seal are weeping slightly. So that’s going to need fixed. I assumed possibly incorrectly if it don’t the pilot injector learns the injectors would be ok, this seems to agree with your advice also

The fuel filter was a genuine ford item/was bought from ford. Are you asking this as there’s an issue here with sub standard parts? To confirm I have pushed it up far enough this was a ballache to do tbh never came across a filter that needed so much finessing to get in correctly. I’ll also check this again to ensure I tight fit. There doesn’t seem to be any leaks …. Outwards at least.

I’ll look to check the housing for any leaks hopefully if there is one it will be here. Is there an easy way to diagnose this as the leak is in the way and not out I assume ?

[knobby1]

It has had multiple codes however, The most recent code is 089 which I believe in fuel pressure regulator. Since doing the PCM update I’ve had a “take off power” fault (I’m paraphrasing, as I cannot remember the exact wording. Reading into this seems a common feature of the newest pcm update. This fault doesn’t seem to have stopped the learns from completing. I’ve done some more work since posting and I found the pressure sensor on the end of the rail I changed for the cheap parts originally only comes with the rail from ford.

Thankfully a family friend was able to give me a rail with the pressure switch(sensor) and the prv which he knows works.

So my weekend work is fit this.

Thanks for the advice on the fuel lines I noticed this the other day as the lines are clear and thought it didn’t seem right. I know one of the injectors seal are weeping slightly. So that’s going to need fixed. I assumed possibly incorrectly if it don’t the pilot injector learns the injectors would be ok, this seems to agree with your advice also

The fuel filter was a genuine ford item/was bought from ford. Are you asking this as there’s an issue here with sub standard parts? To confirm I have pushed it up far enough this was a ballache to do tbh never came across a filter that needed so much finessing to get in correctly. I’ll also check this again to ensure I tight fit. There doesn’t seem to be any leaks …. Outwards at least.

I’ll look to check the housing for any leaks hopefully if there is one it will be here. Is there an easy way to diagnose this as the leak is in the way and not out I assume ?

If you have changed or repaired any of the fuel system components, the pump, pilot and injector learns should be done and the PRV counters reset, this is essentially a "recalibration" of the system back to datum, no two pumps, valves or injectors are exactly the same, even if they share the same part number with another... so the learns are used to tell the PCM what all the components are doing so it can make corrections on the fly. As an example, you could have two "identical" fuel pumps but the pressure and flow rate from one may be slightly higher or lower than another at the same rpm, the learns will pick this difference up and allow the PCM to make corrections accordingly.

The fuel filter housings are known to get hairline cracks and these leak air in, you won't be able to see it as fuel doesn't leak out. The low pressure side of the fuel system actually runs at a very slight vacuum as the pump needs to suck the fuel up from the tank, any hairline cracks in the filter housing will let air in and cause grief. Andz asked about the filter element because non-genuine/poor quality ones can sometimes tend to leak around the center seal, again, they don't leak fuel out, just air in, so any leaks cannot be seen. Many air ingress issues also come from the injector leak-off O-rings and lines, the O-rings in the quick disconnect lines on the filter housing and even at the tank connections. Air leak like these often cause difficult to start issues first thing in the morning or after a period of time sitting.....The air leaks in and this allows the fuel to siphon out of the filter and back to the tank, it then takes a long time for the pump to suck the fuel back up and repressurize the system to allow it to start, if the air leak is bad enough, it will never start.

Lord Knobrot

[andz327]

Fwd ok check the pipe from the filter to the pump the opaque one you said you could see bubbles in , I've seen 3 fwd vans mine included that had this pipe with a tiny hole rubbed through from a rubber hose and was hard to notice

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[D1obl]

Thanks gents.

So I replaced the fuel rail with the prv and it’s still 0089.

Thanks for that andz I’ll check that tomorrow as I’ve just finished. Do we think that air in the fuel line could be causing this.

Van is running but it’s very lumpy. I’ve seen on another thread it needs the counters reset now I thought this was being done previously but it looks like the computer I have, doesn’t do that. The status of the pump
Learn is learned. Would I be able to relearn with the 0089 fault code.

I’m being told it’s defo the SCV now so I’m
Planning on buying another one ….

[vansit1]

did you get it fixed?

[knobby1]

did you get it fixed?

He hasn't been back since...so we'll probably never know.

Lord Knobrot