Question about 1991 Chevrolet S-10

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Fuel pump relay or circuit malfunction code

I have a 1991 chevy s-10 2.8 V6 and i recently changer the entire fuel pump, sending unit and gas tank last year. This year when I took it out of storage it often seems to hesitate or stumble once the engine fires and then it clears up. Now it sometimes doesn't want to start and the code keeps coming up that something is wrong with the relay or fuel pump circuit. Any suggestions?

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Replace the fuel pump realy.

Posted on May 15, 2009

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  • 2 Unplug the fuel pump relay, which is located in the fuse/relay box in the engine compartment on 1995 to 1997 2.2L engine models. Markings on the relay or the back of the fuse box lid should identify the relay. On other models, press the small stem inside the Schrader valve--similar to a bicycle-tire valve--located on the fuel inline rail, right before the first fuel injector. Cover the valve with a shop rag as you depress the stem with a small screwdriver to catch the squirt of fuel.
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