Fuel Volume regulator/pressure regulator
Discussion
Hi Guys, I'm getting an intermittent check engine. Fault,which on viewing suggests possible fuel pressure regulator issue.
I know when I had fuel pump issues the pressure was going higher than normal then dropping away ( probably due to an internal seal leak in the in tank pump).
The new pump fixed the weak mixture issues,but I still get the occasional 0002 fault code.
Any thoughts,or part number for a new regulator?
It's 2004 large boot Monaro V2 gen 3 LS1.
Thanks in advance.
The car is running fine by the way.
I'm wondering if the regulator diaphragm has gone hard with age?
I know when I had fuel pump issues the pressure was going higher than normal then dropping away ( probably due to an internal seal leak in the in tank pump).
The new pump fixed the weak mixture issues,but I still get the occasional 0002 fault code.
Any thoughts,or part number for a new regulator?
It's 2004 large boot Monaro V2 gen 3 LS1.
Thanks in advance.
The car is running fine by the way.
I'm wondering if the regulator diaphragm has gone hard with age?
I have an early 5.7 VXR big boot.
My infrequent engine check light was cured by replacing the O2 sensors. The car ran seemingly fine though and it only occurred at idle. Just a thought.
Otherwise, have you replaced the fuel filter recently. I know the scheduled replacement is very infrequent, but these cars are old now really.
My infrequent engine check light was cured by replacing the O2 sensors. The car ran seemingly fine though and it only occurred at idle. Just a thought.
Otherwise, have you replaced the fuel filter recently. I know the scheduled replacement is very infrequent, but these cars are old now really.
Well,it does seem a coincidence that the fuel pressure when measured went high before it collapsed ( before the pump was replaced and the fuel filter was replaced at the same time.)
The fault code it threw up 0002 on my cheapo reader says fuel pressure/ fuel Volume regulator.
Do we know part numbers for these? Or indeed O2 sensors,which I agree are a very common fault.
Regards
Simon.
The fault code it threw up 0002 on my cheapo reader says fuel pressure/ fuel Volume regulator.
Do we know part numbers for these? Or indeed O2 sensors,which I agree are a very common fault.
Regards
Simon.
astonman said:
Well,it does seem a coincidence that the fuel pressure when measured went high before it collapsed ( before the pump was replaced and the fuel filter was replaced at the same time.)
The fault code it threw up 0002 on my cheapo reader says fuel pressure/ fuel Volume regulator.
Do we know part numbers for these? Or indeed O2 sensors,which I agree are a very common fault.
Regards
Simon.
You're probably right, probably nothing to do with the O2 sensors. This was just my experience with an intermittent engine check light with an otherwise perfectly running engine.The fault code it threw up 0002 on my cheapo reader says fuel pressure/ fuel Volume regulator.
Do we know part numbers for these? Or indeed O2 sensors,which I agree are a very common fault.
Regards
Simon.
AAS changed my O2 sensors, with 2 x Bosch 15703.
https://www.ebay.co.uk/itm/353676175754
Now when I did a search, these didn't come up as the right ones for the car, but that is they fitted and my problem was cured
Wednesday 8th September 2021
the 02 sensor part number is 0258005703 , bank 1 sensor 1 is the left side of the exhaust as you look forward from the back of the car , the bank 2 sensor 1 is the right side of the exhaust , worth some wd40 before trying to remove , i have headers which i think has made things easier
The above was posted in 2021, can anyone verify?
astonman said:
Wednesday 8th September 2021
the 02 sensor part number is 0258005703 , bank 1 sensor 1 is the left side of the exhaust as you look forward from the back of the car , the bank 2 sensor 1 is the right side of the exhaust , worth some wd40 before trying to remove , i have headers which i think has made things easier
The above was posted in 2021, can anyone verify?
Preface this, Regarding my nickname, I am not a mechanic! And I don't work for Motorola.the 02 sensor part number is 0258005703 , bank 1 sensor 1 is the left side of the exhaust as you look forward from the back of the car , the bank 2 sensor 1 is the right side of the exhaust , worth some wd40 before trying to remove , i have headers which i think has made things easier
The above was posted in 2021, can anyone verify?
I don't have a VYII V8 Commodore to cross check over anymore.
On the Bosch AU website, the above number is mentioned. Not sure the link below will work or not.
https://online.autoinfo.com.au/oscar/boschautomoti...
02858005703 only comes up on the Bosch AU website, I would guess the 15703 number is the same thing.
V2 Monaro series III (big boot) over there, is the equivalent of a VYII V8 Commodore.
On the bottom of this page, it cross references a load of numbers.
https://automotivesuperstore.com.au/bosch-02580057...
I know the early cars VTII- VY series 1? only had one o2 sensor per bank.
I would maybe look under there as it looks like the plugs are the main difference from the big boot cars and later little boot cars
I am reading elsewhere that the fuel pressure regulator is in the tank with the fuel pump assembly.
Did you replace the fuel pump only or the whole assembly?
A quick search online shows that Bosch 17503 is the trade number for 0258005703
It would seem 17503 is the correct sensor, backed up by them being fitted to my car by AAS who are a Monaro specialist, at least for the big boot version of the Monaro which only has 2 sensors and not 4 like the small boot versions.
https://www.onlinecarparts.co.uk/bosch-1148992.htm...
It would seem 17503 is the correct sensor, backed up by them being fitted to my car by AAS who are a Monaro specialist, at least for the big boot version of the Monaro which only has 2 sensors and not 4 like the small boot versions.
https://www.onlinecarparts.co.uk/bosch-1148992.htm...
It has long been our experience in Australia that unless Bosch or Walker O2 s are used there can be a lot of problems with the money light coming on.
As for fuel pressure regulators, the 05 onward, and possibly 04 VZ derivatives, share the fuel pressure regulators with 2010 (or equivalent model series) Honda Civic. This is also used in the VE Commodores as well. The fuel pressure regulators fitted to the fuel pump assembly. I recently went down the rabbit hole after mine failed.
All fixed now.
Also, for those with the VZ version of the Monaro, it has been found that there is a Toyota Landcruiser that uses the same pump assembly I think. Josh from the YouTube channel, Josh s Car Corner did a video on it when modifying the fuel pump assembly in his GTO.
![](https://forums-images.pistonheads.com/715283/202511119849638?resize=720[/img]</a> <a href="https://forums-images.pistonheads.com/715283/202511119865895" Target="_blank" >[img]https://forums-images.pistonheads.com/715283/202511119865895?resize=160)
As for fuel pressure regulators, the 05 onward, and possibly 04 VZ derivatives, share the fuel pressure regulators with 2010 (or equivalent model series) Honda Civic. This is also used in the VE Commodores as well. The fuel pressure regulators fitted to the fuel pump assembly. I recently went down the rabbit hole after mine failed.
All fixed now.
Also, for those with the VZ version of the Monaro, it has been found that there is a Toyota Landcruiser that uses the same pump assembly I think. Josh from the YouTube channel, Josh s Car Corner did a video on it when modifying the fuel pump assembly in his GTO.
Edited by FuManchu5ltr on Tuesday 11th November 02:43
Edited by FuManchu5ltr on Tuesday 11th November 02:44
Just a quick update.
Fuel pressure was checked, was good ( with the new pump from last year).
But still running weak on both banks.
Replaced both o2 sensors.
Now only running weak on one bank!
Cleaned the MAF sensor,this fixed the running issue, the MIL light no longer comes on and the car is running very sweetly.
Fuel pressure was checked, was good ( with the new pump from last year).
But still running weak on both banks.
Replaced both o2 sensors.
Now only running weak on one bank!
Cleaned the MAF sensor,this fixed the running issue, the MIL light no longer comes on and the car is running very sweetly.
astonman said:
Just a quick update.
Fuel pressure was checked, was good ( with the new pump from last year).
But still running weak on both banks.
Replaced both o2 sensors.
Now only running weak on one bank!
Cleaned the MAF sensor,this fixed the running issue, the MIL light no longer comes on and the car is running very sweetly.
Great result! Fingers crossed it stays that way.Fuel pressure was checked, was good ( with the new pump from last year).
But still running weak on both banks.
Replaced both o2 sensors.
Now only running weak on one bank!
Cleaned the MAF sensor,this fixed the running issue, the MIL light no longer comes on and the car is running very sweetly.
Glad it turned out to be a simple fix. My MIL has stayed away since replacing the O2 sensors back in Spring.
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