SOURCE: how to replace a fuel pressure regulator
Is it the 3400 v6 or the 2.2l four cylinder? If it the v6 then what you have to do is first know where it is. It located on the end of your fuel rail on the driver side of the car. There will be a plastic hose coming off the top of the regulator, unplug it. You then have to undo your fuel line that runs into the bottom of the regulator. You have to use a wrench to get it off, not sure what size it is. Once you undo the fuel line the next step is to unbolt it from the fuel rail. There will be two screws that run in the side of the fuel pressure regulator that are facing the driver side of the car and are threaded in towards the passenger side of the car, just undo those two screws and the regulator should come off. Just repeat the process backwards to put it back on.
SOURCE: how to replace a fuel pressure regulator
the fuel pressure regulator is on the end of the fuel rail it is held on by a torx screw relieve the fuel pressure using the schrader valve on the fuel rail remove regulator holding screw and replace new regulator be carful not to damage o-rings on new regulator
SOURCE: Idle seems a bit high. Need to know how to adjust and what RPM
There are a couple of things that come to mind. One is make sure the EGR Valve and intake manifold are not carboned up. I normally have to clean them every 60 to 80,000 miles. It will actually close up with Carbon and restrict air flow and make the EGR valve malfunction.
Secondly, the diesel pump may just have a lot of wear and it is putting out too much fuel at idle. The only way this can be checked is by the dealer with a VW specific scan tool such as VAG-COM. With this tool, you can go in and look at the the pump timing and start injection quantity.
I have the start injection quantity many times but you have to have the software and login to get the readings. Most dealers will not do this but would rather sell you a pump if it is off.
Remove the hose from the intake where it connects to the EGR valve and look at the inside with a flashlight. See how much carbon is accumulated. This may not solve this problem but will help with starting and performance issues if corrected.
Good luck and hope this helps. To adjust the Idle, it needs to be programed in to the ECM so i am thinking that it's a Carbon issues that is restricting the air flow which the ECM is compensating to keep the engine from stalling.
SOURCE: how to change a fuel pressure regulator in a 1997
GM Century/Lumina/Grand Prix/Intrigue 1997-2000
Fuel Pressure Regulator
- Removal & Installing
The
fuel pressure regulator is a diaphragm-operated relief valve with fuel
pump pressure on one side and regulator spring pressure and intake
manifold vacuum on the other side. The regulator's function is to
maintain a constant fuel pressure across the injectors at all times.
The pressure regulator compensates for engine load by increasing fuel
pressure as engine vacuum drops.
The fuel pressure regulator is
serviced as a separate component. When servicing the pressure
regulator, make sure that the O-ring back-up, large O-ring, filter
screen and small O-ring are properly positioned on the pressure
regulator.
Fig. Cutaway view of a typical fuel pressure regulator
REMOVAL & INSTALLATION
The need
to work as cleanly as possible cannot be over-emphasized. Even the
smallest amount of dirt, if allowed into the fuel pressure regulator
and/or the fuel rail, will find its way to the fuel injectors. The
nozzle openings of the injectors are very small. Keep hands and tools
clean. Clean the areas to be disconnected with a suitable solvent.
Carefully cover open fittings and connections to keep out foreign
material. Dirt in the injectors almost guarantees a clogged fuel
injector and engine performance problems.
3.1L and 3.4L (VIN E) Engines
Fig. Exploded view of the fuel pressure regulator mounting-3.1L and 3.4L (VIN E) engines
To install:
Other size engine can find in autozone.com (free register).
Hope this help (remember rated this).
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