My girlfriends 2001 Chevy Blazer LT stopped running. She was doing a long drive and it bogged out for a little bit and then proceeded back to normal. For awhile it would take 5-10 times to try and start it to get it to start, but not it wont start at all. I checked all the electrical and getting spark and everything fine there. I poured a little bit of gas into the throttle body and it started right up and died real shortly after gas burned out. I checked if i was getting pressure after the fuel filter and it was plenty (didn't use a gauge but looked fine). So i checked the little pressure valve before it enters the engine and always has pressure there. So its getting fuel all the way up to the engine but for some reason not running. I don't have a shop manual or a good diagram to figure out what else could be the problem so i am coming here for some better help. I'm not familiar with this engine so any detailed advice or help would be very appreciated. Thanks a bunch guys.

 

the problem is the truck needs a minimum of 50psi to run, 30psi looks like alot of pressure but is not enough to run the truck. A fuel pressure and leakdown test would be nessesary.

 

I tested it and im holding around 50 psi. I now believe its a problem with the injectors. What system controls the injectors and any ways of testing? Thanks for the help

 

Sounds like my problem don't replace plugs and wire rotor or cap of course you can but won't fix.... I've even tested the fuel pressure and got 50 psi as well only thing I can you think of is injectors

 

The minimum is 55, you also must check the leakdown, it needs to stay above 55 for at least ten minutes.

 

I've got the same issue going on too. But I have already done the plugs and wires. Next I need to do cap and rotor cuz it looks like a chia pet growing on the terminals from all the misfires I've been having. I have already replaced the fuel pressure regulator. And when I test it I have sixty psi but falls quickly to 30 so I don't know if its the pump or injectors

 

Dang ethanol gas is the root to this issue as for psi I get soooo many different answers its got me confused some say 50 to 60 some say 55 to 65 and 60 up I don't know which is correct I'm going to inspect my injectors next and let you know if that is the fix

 

yeah im almost positive its a leak in the Fuel Pressure Regulator. ill be inspecting it for a leak shortly. I know its not a electrical issue, already cleared that.