Injector port 1 and pump lear

[Simonmate2010]

Hi,

I have a very strange issue with my mk7 2006 2.2 transit. I have just had all 4 injectors refurbished and recoded but when I’ve ran the codes back in it is showing that injector port 1 is over fuelling by around 50%.

I thought it maybe some fault in the injector so I switched injector 1 over with injector 2, recoded then and ran the test again. It was still showing that injector 1 (now the injector I had running in port 2) over fuelling by exactly the same amount.

I am a bit stuck as what to do next? I have changed the fuel pressure release valve, suction pump sensor and the fuel pressure sensor but it’s still showing the same.

Would it be more likely a problem with the rail itself? Or maybe a fuel pump issue?

Thanks in advance any help is appreciated.

[Frag]

You say recoded I assume entering injector correction factors..

Have you done injector pilot correction routine ?

[Simonmate2010]

You say recoded I assume entering injector correction factors..

Have you done injector pilot correction routine ?

Yes I have done. Would it be worth running this again?

[Simonmate2010]

You say recoded I assume entering injector correction factors..

Have you done injector pilot correction routine ?

Sorry forgot to mention that The pilot learn will never go thru with the cylinder imbalance

[Frag]

What was original fault ?
Why did you have injectors reconditioned ?

[Simonmate2010]

What was original fault ?
Why did you have injectors reconditioned ?

I had a split in the rocker cover causing a small oil leak and the fault codes was an injector fault, air flow sensor and glow plugs.

I have replaced the glow plugs with new ones.

When I removed the old injectors they were really dirty and had carbon build up on them so I didn’t think they would seal properly so decided to have them reconditioned.

[Frag]

Did the van run ok before all this ? Not misfiring at all ?

Need to get it to complete pump learn first successfully….
And then injector pilot correction learn…

If it’s failing to complete that,at what point is it failing,do you get an error message to explain why ?

[Simonmate2010]

Did the van run ok before all this ? Not misfiring at all ?

Need to get it to complete pump learn first successfully….
And then injector pilot correction learn…

If it’s failing to complete that,at what point is it failing,do you get an error message to explain why ?

It was badly ‘hunting’ before almost stalling but never did.

The pump learn runs then comes up saying pump learn failed. It doesn’t give me a reason why.

Does the pump learn need to complete before the injector balance?

Thanks for your help by the way. I’m literally so stuck at the moment

[Frag]

Hunting is due to erratic fuel pressure,caused by the 2 valves usually.

Yes,pump learn needs to complete successfully,and I wouldn’t bother trying injector pilot if it doesn’t.

Sometimes pump learn can take many attempts before being successful,
BUT,I’ll be honest I have zero faith or confidence in anything other than genuine fuel valves.
Fuel supply,quality and filter also need to be good.

[Simonmate2010]

Hunting is due to erratic fuel pressure,caused by the 2 valves usually.

Yes,pump learn needs to complete successfully,and I wouldn’t bother trying injector pilot if it doesn’t.

Sometimes pump learn can take many attempts before being successful,
BUT,I’ll be honest I have zero faith or confidence in anything other than genuine fuel valves.
Fuel supply,quality and filter also need to be good.

Ive replaced the pump suction and pressure release with denso parts (I believe these are the same as genuine?)

The pressure release valve has a slight leak when I run a leak test… so I think to get the pump learn complete I may need to look more into what is causing the leak (potentially a bad seal on the fuel rail so that may need to be replaced).

I’ll give the pump learn a few more runs and change the fuel filter as well.

Thanks for your help I’ll give you some updates as I go!

[Simonmate2010]

Hunting is due to erratic fuel pressure,caused by the 2 valves usually.

Yes,pump learn needs to complete successfully,and I wouldn’t bother trying injector pilot if it doesn’t.

Sometimes pump learn can take many attempts before being successful,
BUT,I’ll be honest I have zero faith or confidence in anything other than genuine fuel valves.
Fuel supply,quality and filter also need to be good.

Hi Frag,

i have put a new Denso pump suction sensor in the van but when ever i run the pump learn the van starts stalling after.

its like the fuel pump is learning the wrong thing when i try the temp pump learn?

Worth going to ford and getting an OEM suction pump sensor?

thanks,

Simon

[Frag]

Have you checked or replaced the fuel filter,
Did you cure the leak on the fuel rail ?
Will it still not complete pump learn successfully ?

[Simonmate2010]

Have you checked or replaced the fuel filter,
Did you cure the leak on the fuel rail ?
Will it still not complete pump learn successfully ?

Thanks for the reply Frag,

the leak has sorted. bought a ford fuel release valve for £170 - seemed to do the trick...

The pump learn will not run through still. i am going to change the fuel filter and run again. i think the fuel filter that is fitted i changed around 3 years ago and although not many miles have been done its may fix it!

will update when done! thank you

[Simonmate2010]

Have you checked or replaced the fuel filter,
Did you cure the leak on the fuel rail ?
Will it still not complete pump learn successfully ?

Frag,

many thanks for your advice - i have fitted a new fuel filter and managed to get the engine through its pump learn!!!

the other issue is now that the computer will not let me pass the pilot learn and my injectors are hugly imbalanced! have you seen this before?

i am starting to think its maybe an electrical issue.

Thanks in advance.

[knobby1]

The other issue is now that the computer will not let me pass the pilot learn and my injectors are hugly imbalanced! have you seen this before?

i am starting to think its maybe an electrical issue.

Thanks in advance.

Those inbalances are huge....they usually start to play up at +/- 1.0...but yours are massive with one at 16.42..!! Worst one l've personally seen was 3.15.

Lord Knobrot