It’s in the wiring diagrams I posted, Page 5 and as the PCV has a 12v supply and then to the ecu, as my comment earlier how it is controlled in the ecu I have no idea.
Well in the dia it’s called “fuel volume” which you mentioned in your faults and I could only translate that to “fuel metering” in the written docs.
J
A bit of an update on this (Although I haven't got any further..
Still no start, even after changing the fuel metering valve..
Anyway, I clicked on live data to see fuel rail pressure and by mistake I clicked on cranking aswell, anyway, when turning the car over, there is still no fuel pressure and also noticed that the crank said NO, so am I right thinking this could post to the crank position sensor? past experience on other motors, it was metal on the end causing the error & once cleaned it was fine.
Am I right in thinking with the NO crank?
Thanks in advance
Still no start, even after changing the fuel metering valve..
Anyway, I clicked on live data to see fuel rail pressure and by mistake I clicked on cranking aswell, anyway, when turning the car over, there is still no fuel pressure and also noticed that the crank said NO, so am I right thinking this could post to the crank position sensor? past experience on other motors, it was metal on the end causing the error & once cleaned it was fine.
Am I right in thinking with the NO crank?
Thanks in advance
It would be nice to know what the ohms reading is on a new sensor and your existing crank sensor
Crank sensors are usually a single point of failure so it’s possible.
I posted
Will look for position tomorrow if it’s not in there.
J
I posted
I can only see 1 sensor too.
Some bedtime reading, probably best to read it a few times. Many things could affect the fueling by the looks of it
J
Will look for position tomorrow if it’s not in there.
J
Not sure how much this helps, but.
But if you read the earlier doc, yes it will affect firing of injectors if it fails.
But.
It should not affect the fact you don't have pressure in the fuel rail? which will also not fire the injectors. Suggest you sort that end first. unless you have equipment that can check a square wave form
.Few questions, maybe to make you think or maybe help.
Have you actually checked why you were not getting a 12v feed to the pcv, which is also directly connected to the metering valve supply, and battery.
Why? you were getting a reading from it. did you check the prv?
There must be a code to go with that. NO crank? did it turn over?
I dont know the answer just trying to help.
Oh and be carful of "lefthand side" "drivers side" (LHD?) from what I can make out it gets mixed up from sitting in the car as opposed to standing in front
J
Thanks, I have voltage to the PRV (2 pins at 5v & earth) the PCV is showing at 11v on one pin, 2v on the other pin & 8v over the 2 pins.
The engine turns over fine, but when I was looking at the live data it said no crank
Thanks for any input, I do appreciate it as this is beginning to do my head in now.
Many thanks
The engine turns over fine, but when I was looking at the live data it said no crank
Thanks for any input, I do appreciate it as this is beginning to do my head in now.
Many thanks
Hi Guy's, a bit of a update & just hoping for a bit of advice.. ive ran a gravity fed fuel feed, straight to the inner wing inline pump, to eliminate the one on the tank. No Change.
So then, ive made a tyre valve into an injector plug, disconnected an injector, connected the tyre valve to it, put 50psi into it to see if I could get any pressure showing at the rail & it's still showing 0kpa.
When cranking the pressure gauge does rise, so am I correct inn thinking that the pressure sensor is at fault?
I did test it on the left rail (looking at the car) and the pressure sensor is on the right rail (don't think that would make a difference as Im sure they are connected).
I would welcome any advice/tips.
Many thanks in advance
ASH
So then, ive made a tyre valve into an injector plug, disconnected an injector, connected the tyre valve to it, put 50psi into it to see if I could get any pressure showing at the rail & it's still showing 0kpa.
When cranking the pressure gauge does rise, so am I correct inn thinking that the pressure sensor is at fault?
I did test it on the left rail (looking at the car) and the pressure sensor is on the right rail (don't think that would make a difference as Im sure they are connected).
I would welcome any advice/tips.
Many thanks in advance
ASH
Thing is (cant remember the numbers) but they operate at a huge psi so maybe 50 wont show.
What did the gauge rise too when you cranked cos if it was only a small psi range theoretically it should have blown up the gauge think earlier doc mentions something like 150bar for starting, (need to look again).
Did the rail hold the pressure though? and what pressure did it reach?
I wouldn't have thought a pressure sensor is much money so maybe worth a punt to rule it out.
If the HPFP is putting out the required pressure but you didnt blow up a 150psi gauge(or whatever you used) then the PCV maybe at fault. which is the reason for asking what pressure and did it hold.
J
What did the gauge rise too when you cranked cos if it was only a small psi range theoretically it should have blown up the gauge think earlier doc mentions something like 150bar for starting, (need to look again).
Did the rail hold the pressure though? and what pressure did it reach?
I wouldn't have thought a pressure sensor is much money so maybe worth a punt to rule it out.
If the HPFP is putting out the required pressure but you didnt blow up a 150psi gauge(or whatever you used) then the PCV maybe at fault. which is the reason for asking what pressure and did it hold.
J
I put 50psi into the rail, quick crank & went uptown 60psi, it then held pressure until I cracked another injector to release the pressure.
A pressure sensor is £100 so wanted to be sure before I shed out another £100 as they are mounting up.
I personally would of thought that even with 50/60psi into the system, it would of shown something on the live data, even if it was minimal (but I could be wrong)
A pressure sensor is £100 so wanted to be sure before I shed out another £100 as they are mounting up.
I personally would of thought that even with 50/60psi into the system, it would of shown something on the live data, even if it was minimal (but I could be wrong)
I dont know. But I do understand the its only £100 but that didnt fix it
, and how that can mount up.But 50psi on a sensor that reads over 2000bar may not start reading till it reaches the min. Which is why it gives a "no start" at low pressure.
I would have expected, even on a short crank for the pressure to rise far more.
I dont know much about diesels (just happens our latest is) but I do know that most DIYers dont have the ability to test things at the high pressures that are required.
Do you have any Diesel specialists near you who could maybe test things? The PCV should hold pressure in the rail for the next start and (without reading the doc) will be a dam sight more than the PSIs you are working with, The HPFP should put out enough to blow your low PSI gauge, The sensor may not work in the range you are looking at.
You did some sort of gravity feed? Why not check the low pressure feed to rule out your intank pumps? (its in the doc).
J
Right, a bit of an update....but more advice needed
Ive replaced the flow sensor on the pump, replaced the pressure regulator on the L/H rail at the back (As you look at the car), also replaced the pressure sensor (R/H front of the rail) I have now got fuel pressure at the rail but still no start (Live data shows 16.96mpa), I haven’t built all the manifold & other bits yet so expected fault codes, but can anyone tell me if any of the following would actually stop the car from starting?
Thanks in advance
Ive replaced the flow sensor on the pump, replaced the pressure regulator on the L/H rail at the back (As you look at the car), also replaced the pressure sensor (R/H front of the rail) I have now got fuel pressure at the rail but still no start (Live data shows 16.96mpa), I haven’t built all the manifold & other bits yet so expected fault codes, but can anyone tell me if any of the following would actually stop the car from starting?
Thanks in advance
Datatek
Well-Known Member
2320psiWhat’s 16mpa in real money (I am lazy) and does it reach the min for start condition in earlier docs posted.
But it’s progress
J
Right Guy's, ive built my motor back up, cleared all the fault codes but still getting the following (See picture)
Also I've noticed that when I run live data, im getting 17mpa at the rail (246psi approx) but it states that the desired map is 30mpa.
Also, when the motor turns over the fuel rail pressure doesn't go above 17mpa which I would expect it to from the high pressure pump.
See the video of it cranking & please I would welcome any advice/pointers (Video link: )
Thanks in advance
ASH
Also I've noticed that when I run live data, im getting 17mpa at the rail (246psi approx) but it states that the desired map is 30mpa.
Also, when the motor turns over the fuel rail pressure doesn't go above 17mpa which I would expect it to from the high pressure pump.
See the video of it cranking & please I would welcome any advice/pointers (Video link: )
Thanks in advance
ASH
Attachments
Im after some further advise off anyone who can give it to me..
As said earlier, im getting around 17mpa, however, when I take the sensor off the rail, im still getting 17mpa (with no pressure), ad then when I unplug the sensor, live data is showing at 220mpa, has anyone known this before??
Many thanks
As said earlier, im getting around 17mpa, however, when I take the sensor off the rail, im still getting 17mpa (with no pressure), ad then when I unplug the sensor, live data is showing at 220mpa, has anyone known this before??
Many thanks
