My 95 blazer recently died on the freeway, just stopped running and hasnt started since. After looking under the hood I noticed that the valve that is used to check the fuel pressure has gas coming out of it. was not pouring out just dripping, I had replaced these fuel lines not too long ago and were still under warranty so I took them back and got new replacements. After hooking them up and still not starting I noticed that fuel was not going into the line that feed the fuel injector assembly. I naturally though it then must be the fuel regulator and since I just recently purchased the assembly that was also under warranty I returned it and received a new assembly.

Well that wasnt the issue either. I cannot take to a place to have the code read and I cannot afford a fuel pressure tester either...no not even if I can return for money back I cannot afford it. I am thinking it must be the fuel pump? I hear the fuel pump run when I turn the key and tried it many times hoping that it will build up to feed into the assemebly but it will not feed past the pressure valve or feed into the line that goes into the assembly. If I take the line out of the assembly gas spurts out of the line. With the line connected the pressure valve will also shoot out gas. I have disconnected the fuel line after the fuel filter and gas comes out of it when the key turns.

So even though the fuel pump runs, could it be that it is not running good enough to send the fuel through the assembly? The noise the fuel pump is now making does not sound as it normally does it is louder and doesnt seem like the normal hum it has made for years?

Any suggestions? before I attempt to lower the tank and borrow money for a new fuel pump? can it be anything else? Any help would be appreciated. Anything that will require me to purchase something I will not be able to do. I have been laid off with no money coming in and I need to get this running in order to go to interviews. without it I am done. Thank you in advance.

 

Fuel pressure is critical on this engine, and it sounds like there might be a problem with it. You'll need to borrow or rent a fuel pressure tester. Most auto parts stores rent/loan them free of charge. They do require a deposit, but they return all of it when you return the tester. When you have it, let us know and we can walk you through the diagnosis.

 

so if it is the fuel pressure could it be that the pump is needing to be replaced? I would think that it is the fuel pressure only because the fuel is not even passing the pressure valve nor going into the fuel line in the manifold that goes into the assembly.

Even though the pump makes noise doesnt mean that it is giving enough pressure correct? would it be a good guess that it is the pump? otherwise what would it be if the fuel lines are new, fuel injector assembly is new which includes the fuel pressure regulator and the fuel filter is new as well. Could it be anything else? thank for the reply

 

install it and note the fuel pressure. Cannot give a recommendation or a possible solution unless you have a fuel pressure gauge.

If you have a gauge you can tell a lot of things including where the fault is and which component is at fault.

If you start replacing parts randomly, you are wasting time and money.

I have a factory service manual for the 1995 S/T so I have troubleshooting charts. PM me if you have any questions BUT GET A FUEL PRESSURE Gauge!!

 

First thing and really important. You need to address the issue of the fuel "dripping". I almost lost mine to a fire because of this. Shrader valve tool, three bucks at most, some chain parts guys don't know what your talking about. Tell them the thing you need for the valve stem on a tire. You put over the stem on the test port, righty tighty lefty loosey. It could be loose, if that does not stop the bubbling you need a new fuel safe core.
This could be what is dropping the pressure enough for it not to start.

Sorry like Capt. says you will need a pressure gage. Beg, bargin steal or walk.

 

Just because the fuel pump is making noise, does not mean the pump is good or bad. Check fuel pressure and leakdown. The results will tell if a problem exists, it will NOT tell you what the problem is. If pressure is low, or leakdown is excessive, the problem could be in the tank or in the plenum. More testing is necessary to pinpoint the problem.

 

Thanks for the comments everyone. Not only did my car die but my computer took a dump as well. but is now up and running.
Spittybays: as I stated I did fix the dripping by replacing the fuel intake and return lines, as I replaced them not quite a year ago and were under warranty. But thank you for the heads up.
Ramjam2112: I did narrow the problem down to being a fuel pressure problem, as the fuel did not enter the fuel line going into the assembly. I replaced the assembly due to the fuel pressure regulator being sold within the assembly and was replaced under warranty as well. So I was not wasting any money on parts not needed. Figured if it didnt work at least I got a newer assembly and did not spend a dime. As I stated, I dont have a dime to start off with. I just was not sure if the fuel pump would be a factor although I would think it would be obvious, but guess I just wanted some confirmation.
Captain Hook: thanks for your insight as well, as your advice you give to everyone is always helpful and knowledgeable. Your response confirmed my suspicions about the pump not working just because it sounded like it was running. Again, I new the issue was pressure due to the fuel not going into the assembly there was pressure just not enough.

When I priced the renting of a fuel pressure gauge I was quoted $150. Was told they now only rent the one anymore. I did not have the $$. Guess I was just wanting a good educated guess since I thought I eliminated some of the most obvious that it may be.

I replaced the fuel pump and is up and running like a champ. Thanks again for all the input, it was truly appreciated.