Just a quickie is this item all part of the fuel rail or can it be bought as a seperate item? Anyone any experience of this fault? Nisan claiming nearly 5hrs to do the repair? :shock: :evil:
Fuel Pressure Relief Valve
cpcm69
1 - 20 of 29 Posts
Joined
·
5,536 Posts
It's part of the rail, plus it won't be that at fault, that's what the fault code related to when I was having problems, fault code was P1272 (pressure relief valve open) this has opened due to excessive fuel pressure as that's what it is ment to do, and what controls fuel amount and pressure??. SUCTION CONTROL VALVE. There isn't a fault code for the suction control valve, so hence why it will throw up other codes. That's the thing with fault codes and computers, they very rarely give you a direct diagnosis! They point you in the right direction and it's then down to the experience ( or lack of in some cases) of the machanic to the locate the accual problem.
Just did a search on the system here and see P0093 is a fuel leak code so could it be the rail or do you still think SQV? Truck is doing my head in and causing all sorts of arguements with other half, Nissan quote £650 part £1085 all in to do the job :shock:
So reading between the lines it could be any of those listed knowing my luck it'll be the bloody pump, i'm guessing their pitching in the middle unless they've carried out other testing? I'll get ready for the arguements to start me thinks :?
ps thanks again for posting Andy
ps thanks again for posting Andy
Joined
·
1,348 Posts
Yet the bottom two solutions are fairly benign, changing the fuel filter, charging the priming handle etc. Suction control valve is also a common culprit and luckily you can get that part separately.
Re: Fuel Pressure Relief Valve - Smells like bull???
Well still on going, but i need mechanical knowledge please????
I had a call from the stealer around 4 as i was expecting to have the truck back today after getting a replacement fitted. He told me there was a slight problem in that when they removed the fuel rail it highlighted that the fuel pump was loose???
He says as he's aware of the issues i've had with truck/nissan he'll rectify it without charge, i ask could this be the issue that set it off in 'limp' to which he says think not as when all bolted together all ok and pump doing it's job.
Now i never believe a stealer does owt for nowt (yes there are some exceptions i know) but he then tells me that he'll have to remove the new chain thats been fitted to effect the repair. So my question is why would they have to remove the front of the engine to do repair? (unsure where pump is) Why would they do it without charging? Is it something that yet again fails on a D40? Do you think they did summat wrong when replacing cam chain? or is he just pulling my chain?? as not now getting it back till Monday at the earlist!!
Well still on going, but i need mechanical knowledge please????
I had a call from the stealer around 4 as i was expecting to have the truck back today after getting a replacement fitted. He told me there was a slight problem in that when they removed the fuel rail it highlighted that the fuel pump was loose???
He says as he's aware of the issues i've had with truck/nissan he'll rectify it without charge, i ask could this be the issue that set it off in 'limp' to which he says think not as when all bolted together all ok and pump doing it's job.
Now i never believe a stealer does owt for nowt (yes there are some exceptions i know) but he then tells me that he'll have to remove the new chain thats been fitted to effect the repair. So my question is why would they have to remove the front of the engine to do repair? (unsure where pump is) Why would they do it without charging? Is it something that yet again fails on a D40? Do you think they did summat wrong when replacing cam chain? or is he just pulling my chain?? as not now getting it back till Monday at the earlist!!
Re: Fuel Pressure Relief Valve - Smells like bull???
Ok i've tried a search on this and found a post by Andy that the fuel pump is driven by the cam chain, but does that still mean it has to be removed (cam chain) to sort the pump :?cpcm69 said:
Joined
·
564 Posts
To remove the pump you only need to remove the upper timing chain.
PS: Replace the oil seal and o-ring under the spacer of the pump as they tend to leak after fitting the pump back.
PS: Replace the oil seal and o-ring under the spacer of the pump as they tend to leak after fitting the pump back.
Joined
·
564 Posts
Yes I have!
Pump bolts were loose and eventually fallen, this cause timing chain to snap and valves damage...
Pump bolts were loose and eventually fallen, this cause timing chain to snap and valves damage...
Joined
·
1,101 Posts
Sorry to dig this one up from the depths, but did you fix this in the end. I too have the P1272 code. I am waiting for a new pressure valve to arrive tomorrow, but am now concerned its the SCV.
TIA
TIA
Long story short, the pump and fuel rail was changed twice and it didn't solve the problem, in my case it was the main wiring loom in the engine bay (only took 12 months to sort).nexsuperne said:
Many many others have sorted their limp mode by changing the SCV, im sure Dave is right after Billcar have worked on your truck and are sending you the right part :thumbright:
Joined
·
1,101 Posts
I hope he is right, he has way more experience of these systems than I have. Give me a crappy old 300tdi land rover anyday....
Joined
·
1,101 Posts
It was fine until the remap, which has increased the rail pressure, so it does make sense to be the PRV sending back **** readings and blowing early. Fingers crossed!!
1 - 20 of 29 Posts
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
