Need help fuel pressure

[Matt246801]

Just ordered the two valves from pf Jones so hopefully that does the trick
Cheers for the help guys

[Matt246801]

Update on this guys, replaced the valves genuine ford and fuel pressure is still all over the place am I looking at a pump now? Only things left are a pump or air in the fuel lines? Getting really fed up of this now any help appreciated

[knobby1]

Update on this guys, replaced the valves genuine ford and fuel pressure is still all over the place am I looking at a pump now? Only things left are a pump or air in the fuel lines? Getting really fed up of this now any help appreciated

Did the learns procedure complete satisfactorily..?? PRV counter reset.?? Pump & pilot learns etc...??

Lord Knobrot

[bambi mk 1]

Have you checked the clear pipe from the filter to the hp pump ,it can rub through on one uf the other pipes

[Matt246801]

I’m pretty sure it said procedure aborted, It’s not letting whatever procedure it is finish because of the fluctuating rail pressure? I’ve checked the clear pipe and it looks fine, still the same fault code too p0089 fuel pressure

[knobby1]

I’m pretty sure it said procedure aborted, It’s not letting whatever procedure it is finish because of the fluctuating rail pressure? I’ve checked the clear pipe and it looks fine, still the same fault code too p0089 fuel pressure

If it doesn't pass the learns, it will never run properly. Have you have the injectors checked..??...Leak-off test etc...??

Lord Knobrot

[Matt246801]

Injectors were all tested professionally one was knackered and the other 3 were just a pass I was told so just got one new one, got them coded in and then thought that would be it sorted but the code is still there, so injectors been tested and one renewed, one newish second hand filter housing as their was large air bubbles in the fuel line and now down to smaller ones, and brand new ford scv and fpv but the sensor on the end of the rail is still the eBay one form tpuk

[Matt246801]

It definitely runs better since the valves were changed and it’s running alright just now as before it was always going into limp mode or not letting me rev properly, It judders at low revs every so often but I just want to get to the bottom of it

[knobby1]

It definitely runs better since the valves were changed and it’s running alright just now as before it was always going into limp mode or not letting me rev properly, It judders at low revs every so often but I just want to get to the bottom of it

I would refit the original rail pressure sensor, from our experience they rarely fail.

Lord Knobrot

[Matt246801]

Still no joy with this guys any ideas? Thinking of maybe borrowing a set of injectors and try them in to rule them out ?

[lancy]

When i had to replace mine i found an injector to be nackerd once i changed that it flew through the learns, thought it may help?!

[loot]

Leak off test is a good indicator

[Airthies]

Was about to suggest leakoff test, always a good test and least effort and cost.

BUT .... before that.

Have you changed fuel pressure SENSOR?
What sensor is in it now?
Genuine original?
EBay "genuine" replacement?
PFJones replacement?
OEM Ford replacement?

It doesn't matter how good the valves are if you've got a shitty pressure sensor the PCM still can't get accurate info to carry out the learns.

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[Matt246801]

Thanks for the reply’s, the sensor is the eBay item but was told by the guy doing the coding and pump learn that if the sensor is faulty it usually shows on or off not fuel pressure irregular as in going up and down? Not sure if that’s true or not?

[Airthies]

My moneys on a new sensor from PFJones (or ford) sorting your problem

Sensors can work but be inaccurate especially cheep ones the fuel pressure will fluctuate slightly as the system tries to regulate itself but a dodgy sensor may exaggerate any change in pressure.

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