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'96 Blazer not getting gas. . . .

09-04-2007, 06:49 PM
1996 Chevy Blazer, drove over to a friend's house, parked, and when I tried to start it up 15 mins. later, it wouldn't start. Have checked the battery, it's good and I had it fully charged while I had it out to check it. Then I replaced the fuel filter. Still won't start. Acts like there's no gas but I have approx. 1/2 tank. When I pour gas into the engine, it will start and run, - but just until the gas I poured in runs out, then it coughs and dies. Any ideas or similar situations out there? My car's been down for almost 3 weeks and it's killing me!

Chris Stewart
09-04-2007, 07:31 PM
Check your fuel pressure, here's where..

09-05-2007, 06:44 PM
does it have a fuel pressure shut off switch?

If so, make sure it's not tripped and reset it.

09-05-2007, 07:37 PM
The vehicle is not equipped with a fuel shut off switch. Here is the fuel pressure testing procedure:

Fuel pressure is not monitored by the On Board Diagnostic (OBD) system and therefore cannot set a Diagnostic Trouble Code (DTC), or illuminate the Service Engine Soon (SES) light.

Fuel pump operation:
The fuel pump circuits are designed to energize the fuel pump through a relay continuously any time the key is in the START position. When the key is in the RUN position the fuel pump will operate provided the engine is running. If the engine stalls, or is not running for any reason, the PCM/VCM will shut off the fuel pump after approximately 2 to 3 seconds.

Fuel pressure test:
Install the fuel pressure gauge to the test port near the distributor. Turn the key to the RUN position but do not start the engine. While the fuel pump is running, fuel pressure must be 60-66psi. After approximately 2 to 3 seconds, the fuel pump will shut off. Fuel pressure must remain between 55-60psi for several minutes. A drop in pressure below 55psi indicates excessive leak down. Possible places to leak are the fuel pressure regulator, the fuel lines under the upper intake manifold, a fuel injector that is stuck open, a leaking fuel line or connector, or the check valve in the fuel pump assembly.

Here is a link to an inexpensive and adequate fuel pressure tester: Accurate diagnosis of an internal fuel leak requires additional test equipment. In some cases it requires the removal of the upper intake manifold.

Chris Stewart
09-05-2007, 09:52 PM
Thanks for the info OM, I'll go by the local HF store and get another one.

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