Nissan Repair Questions? Ask a Mechanic for Answers ASAP
depending on where the clamp is located exactly would help
should have 2 lines with 1 of them being a vacuum line
i would pretty much bet that the line that is being clamped is the vacuum
which means 1 of 2 things
either the fuel pressure is low, and hes cutting vacuum to raise fuel pressure.
or the fuel pressure regulator is bad, and leaking fuel through the vacuum line and flooding it out.
so ideally you would want to remove the clamp
and see if there is fuel in the vacuum line
if there is, then you need a new regulator
if no fuel in it, then you need to check fuel pressure as it's likely low
le tme know if you need anything else
If you need anything else just ask.
otherwise please leave a kind rating. thanks
This fuel pressure regulator. Is there any way I can tell if it is faulty? Should I be able to suck or blow through it?
Also, do you know if a regulator for a 2.0L is the same as a 1.8L regulator, or are the settings different.
The 2.0L part is proving quite hard to find.
Thanks for that Jake.
Just to summarise, we cannot blow through the regulator, so does it sound like the regulator could be fine.
If so, any idea where the problem could lie. Originally some one had fixed some mole grip pliers to the fuel pipe, presumably to reduce some pressure.
The pipe is now damaged through the pliers, so maybe that is sucking in air too??
Ok, thanks for the advice.
Just out of interest, when we replace the fuel pipe later this afternoon, how do we check the fuel pressure.
You just need a mechanical gauge with a t-fitting adapter to put between the rail and fuel line.
Thanks once again for your time.
Right, we replaced the new fuel pipe with a brand new piece of pipe. The car now starts okay, runs for a short time, then goes to stall. If you apply more revs to try and keep it running, it just splutters and dies.
I am going to try and test the pressure going through the regulator, but can you advise of what the ideal pressure is that should be coming through the regulator.
Ok nice one. Will check that later.
Or another note..... could this be anything to do with the Lambda sensor and maybe not related to the fuel pressure regulator at all?
What do you reckon?
It's highly unlikely that a Lambda sensor would effect driveability that harshly. Especially sputtering under revs like that.
If any sensor was causing it, it would be the MAF sensor and not the Lambda sensor. The only accurate way to check a MAF sensor is with fuel trim readings.
Getting there slowly. We replaced the fuel pressure regulator & fuel pipe, and after some initial spluttering and stalling, the system sort of cleared and car ticked over nicely.
Then the revs keep dropping really low, say 400-500 rpm, and sometimes it picks itself back up and recovers, and other times it just cuts out and dies.
Any ideas where we would look now?
Now that you have corrected the issue with the fuel system it may just be an idle adaptation issue.
Now since you have a 2001 your right at the changeover year on the throttle systems, so i am not sure if you have the standard cable driven throttle system with idle control valve or if you have the fully electronic throttle.
If you have the standard throttle assembly you just need to clean it out spotless and drive the vehicle and allow it to relearn it's adaptations. The electric throttles require an idle volume relearn procedure.