1991 Chevy Blazer fuel pump or carburetor

JSTHOMPSON

MEMBER
1991 CHEVROLET BLAZER
6 CYL
4WD
AUTOMATIC
125,000 MILES

If I put a littel gas in the carborater the engine will run for a minute. I took off the back right fuel line on the carburetor and fuel flows out when engine is running, theres another fuel line on the left back but nothing comes out of it
Iknow where the fuel filter is and can replace it

where is the fuel pump?

or is either of these the problem.

Thank for any help you can provide me

3 Replies

OBXAUTOMEDIC

MECHANIC
3,711 POSTS

Hello,

The Fuel Pump is in the Gas Tank.

It sounds like you have a fuel problem. If you can have someone turn to vehicle over while you look in the throttle body(or carb). There are 2 Fuel Injectors watch and see if gas is being sprayed out. If so you will need to check the fuel pressure.

.

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Tuesday, January 20th, 2009 AT 12:45 PM

JSTHOMPSON

MEMBER
2 POSTS

While the engine is runnig (after put a littel gas in the carb ) or while cranking the engine there is know fuel spray out of the carb injectors. But as the engine was running with the back right fuel line off there was fuel flowing out (not squirting ) of the line.I'm going to R&R the filter to see if that increase the fuel pressure out of this line but before I R&R the fuel pump How can I be sure the carb is good.

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Tuesday, January 20th, 2009 AT 12:58 PM

OBXAUTOMEDIC

MECHANIC
3,711 POSTS

Go ahead with the filter change. The pressure on your vehicle is only supposed to be 9 -13 psi. So I would check fuel pressure.

If pressure is to high or to low it is possible that the Fuel Pressure Regulator is Bad.

You will also need to check the injectors to make sure they have power and are working correctly.

To test injector you will need a Digital Volt Ohm Meter.

Disconnect Injector Harness, check resistance across injector terminals. Resistance should be 1.3

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Tuesday, January 20th, 2009 AT 1:14 PM