I'm trying to remove the fuel presser regulator on my 97 Z28 and I can get the one off on the regulator it self off but I can not get the little bolt off that holds the two metal fuel lines together I believe it a T25?
I have ASR on my car and I can seam to get to that bolt do I have to take some stuff off to get to it? There must be a way to get to it with out pulling everything off.
Help!


Thanks,

 

I've never removed the FPR myself only because the stock one is so good and replacing it with an aftermarket piece is almost always a bad idea. Perhaps we can convince you otherwise that replacing it is a poor idea - then you wouldn't have to worry about removing it.

 

We had to replace a bad FPR on my son's 95z with a stock replacement. Found it easy by removing the fuel rail.
It also gave us the opportunity to clean the injector tips, and change the o-rings.
Removing the fuel rail is a simple and quick task.

 

Use a small Torx bit of the correct size in a socket, to allow you to access the head of the upside down screw that clamps the bracket that holds the two hard lines. GM engineering at it's finest.......

 

It's bad and needs to be replaced.I turn the key on it gets presser and then releases it.


Yea it's a real pain.
I have one of these with the torx bit but I can't fit it in there.
8 Piece Right Angle Screwdriver

There is some type of square piece with two vacuum lines comeing from it right under it and it's in way and it's hard too see how it comes out because of all the ASR lines.

 

What do you mean "releases" it? Fuel pressure dropping could be a number of things - not necessarily the regulator.

 

Sounds more like the fuel pump than the regulator. Usually when the regulators go bad they will still hold pressure but leak fuel through the vacuum reference line.

 

I just changed mine, and it was a pretty easy job, once I removed the fuel rail from the intake manifold.

Mine was allowing fuel to pass through it. ind of figured as much, with 203,000 miles on it!!

 

Yea it won't hold the fuel pressure. As soon as the fuel pump turns off the pressure goes down very fast.
Car runs fine just hard to start.


I just replaced the fuel pump.

 

Pressure dropping off very fast is almost ALWAYS either a fuel pump issue or a fuel injector issue. Think about it. If the fuel pressure builds when the pump is running and the regulator is maintaining that pressure, when you shut off the pump and the pressure drops the fuel that is in the lines has to go somewhere - either through the fuel injectors or back into the tank.

Pull the fuel rail and injectors up then cycle the pump on (you can use the 12v+ jumper lead in the engine bay if you want). If any of the injectors drip or spray there is your problem - a stuck injector. If not, then the check valve in the pump or the hose leading from the pump to the top of the tank is torn, cut, or not seated properly (very possible with new installations). I've seen a few with very small razor cuts in them.

What steps did you go through to determine the regulator is bad? Is there fuel in the vacuum compensation line? Did the fuel pressure change with the line disconnected with the engine running?

 

I was told by somebody that it was the fuel presser regulator.
I swapped it out today and that's not the problem.
So I will be pulling of the fuel rail to check the injectors.
But If I have a stuck injector or leaking injector why would the check engine light not be on?
Also the car runs fine I would think with a stuck injector or leaking injector that the car would run like crap or I would feel something and the check engine light would be on?
Let me know.
Thanks,

 

From my understanding a leaking injector will just drop its supply into your intake and make it harder to start for two reasons not the proper pressure unless you cycle key a couple times plus the fuel leaked into intake may richen you up enough to effect startup (unless parked long enough). Its a fuel pressure issue but not caused by fpr as its just preventing your pressure from being excessive and your pump keeps up with the leakdown of pressure. Read joes(ram air) post because the issue could be at fuel pump too.

 

Yea I understand what he is saying.
I replaced the line from the pump to the top of the tank so I doubt it's that.
Could be the pump but I don't know of a way to check that.
The only thing I can check easy is the fuel injectors.
So I'm going to try to pull the fuel rail off tomorrow and check them.
I really hope it's an injector because I don't want to pull the tank down again because I just replace the fuel pump about 1-2 months ago.

 

If its not the injectors and have to check the pump I would do the trap door. Its pretty easy and then its there when needed. What pump did you put in? Ive heard of alot of new pump failure especially in knock off and cheep ones. They need quarter tank to keep cool also or can burn them up.

 

Like I mentioned in my previous post it is not outside the realm of possibility for the fuel pump tube to be leaking or cut which would cause your problems. Just because it is new doesn't mean it's perfect. Could have popped off during the install.

The fuel pump could very well be the problem. Again not all are created equal.

If you had a fuel pressure test gauge we can walk you through the steps to determine which fuel system component is the problem.

If you have to get down to the fuel pump definitely cut the hatch to gain access (try a search on this). It's something most people wish they did in the first place. Beware the naysayers and worry-worts who complain about harming the structural integrity though - don't listen to them.