Mk7 fuel metering valve

[carlburt78]

IMG-20191004-WA0000-450x800.jpg

Hi guys in need of some advice I have a mk7 2008 FWD,2 2 transit i have just put in a reconditioned engine in it (tall engine ) and put all the bits from my failed engine onto it , it ran good for about 2 weeks then started hunting and cutting out....it did used to hunt before I had engine failure but never cut out .my brother plugged his snap on into it today to test the fuel pressure and it came back with these results , there were no codes, but I'm struggling to interpret the results so can anybody shed some light please ?

[carlburt78]

The first marker is 100 then 200 ,pics have gone a bit grainy when resizing, sorry, Apparently the top graph is my actual fuel pressure and below is what it should be

[carlburt78]

Am I correct in thinking the fuel pressure is fine ? Or should the line be straight like the one below ?

[daraioj]

I can't really see the figures on the pics but the desired pressure on idle should be 230bar and the actual pressure shouldn't fluctuate too much... If it drops under 200 then it'll hunt.

It might just need a pump learn if the SCV is in good shape.

[knobby1]

I can't really see the figures on the pics but the desired pressure on idle should be 230bar and the actual pressure shouldn't fluctuate too much... If it drops under 200 then it'll hunt.

It might just need a pump learn if the SCV is in good shape.

If it cuts out ...the PRV might be duff....if this is the case, the SCV will be the cause.

Lord Knobrot and

[carlburt78]

I can't really see the figures on the pics but the desired pressure on idle should be 230bar and the actual pressure shouldn't fluctuate too much... If it drops under 200 then it'll hunt.

It might just need a pump learn if the SCV is in good shape.

If it cuts out ...the PRV might be duff....if this is the case, the SCV will be the cause.

Lord Knobrot and

Thankyou I will get them ordered , are the Denso valves ok ? Because my local motor factors wanted £138 just for the PRV

[knobby1]

Thankyou I will get them ordered , are the Denso valves ok ? Because my local motor factors wanted £138 just for the PRV

The genuine items are Denso...PF Jones are a quality supplier also.

Just be warned that buying cheap often means buying twice....we've had poor results with the cheap ones, they just don't work well.

Lord Knobrot

[carlburt78]

Thankyou I will get them ordered , are the Denso valves ok ? Because my local motor factors wanted £138 just for the PRV

The genuine items are Denso...PF Jones are a quality supplier also.

Just be warned that buying cheap often means buying twice....we've had poor results with the cheap ones, they just don't work well.

Lord Knobrot

Thankyou I have bought the denso valves

[bambi mk 1]

Why did you change the engine Its silly to fit a recon engine and old injectors without getting the injectors checked out

[carlburt78]

Why did you change the engine Its silly to fit a recon engine and old injectors without getting the injectors checked out

The engine failed completely , I'm a courier and have 2 transits and need 2 so I can jump straight into the other when one goes wrong and as it happens the spare van had issues and was due a MOT so everything was a massive rush , it always ran ok on the old engine apart from occasional hunting and when new engine was put in it ran great for 3 weeks until the hunting returned but worse ,making it cut out .

[carlburt78]

Why did you change the engine Its silly to fit a recon engine and old injectors without getting the injectors checked out

Are you saying the injectors could have made the original engine fail? How do I check them ? Thanks

[bambi mk 1]

Why did you change the engine Its silly to fit a recon engine and old injectors without getting the injectors checked out

Are you saying the injectors could have made the original engine fail? How do I check them ? Thanks

Get them checked in a diesel shop.Where are you based

[carlburt78]

Why did you change the engine Its silly to fit a recon engine and old injectors without getting the injectors checked out

Are you saying the injectors could have made the original engine fail? How do I check them ? Thanks

Get them checked in a diesel shop.Where are you based

Cornwall , my brothers a mechanic and he put the engine in ,but it was all a massive rush coz he was off on holiday and i needed the van back because my spare ran out of MOT

[bambi mk 1]

http://www.cityautodiesel.co.uk/ You could try these folks The quickest and best way is to leave the van with them as buying from online can end up a ball of trouble.The labour wont be much for removing and refitting and doing the codes plus you will have warranty

[carlburt78]

http://www.cityautodiesel.co.uk/ You could try these folks The quickest and best way is to leave the van with them as buying from online can end up a ball of trouble.The labour wont be much for removing and refitting and doing the codes plus you will have warranty

Thanks I will look into that , they are only 20 minutes away from me