1983 GMC S15 Where's the fuel pump?

1983 GMC S15
130,000 MILES • 6 CYL • 4WD • AUTOMATIC
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OTTERGUY
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This is a S15 Jimmy. My son was told it didn't pass smog test because it was leaking from around the fuel pump. I took a look assuming mechanical fuel pump on engine block but I cant find it. Is it in the fuel tank? and if so how would that affect the smog test results?
Jan 4, 2010 at 4:49 PM
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RASMATAZ
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Due to excessive fuel pressure-could be the fuel pressure regulator and a clogged return line-This problem will raise the hydrocarbons -unburned fuel.
Jan 4, 2010 at 4:55 PM
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OTTERGUY
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razmataz-
That makes sense to me. Would the fuel pressure regulator be up by the carburetor (yes this baby is pre fuel injection) or on the fuel pump?
Jan 4, 2010 at 5:41 PM
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RASMATAZ
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My Q here is it a TBI or a Vortec system-if its a TBI its within the injectors on top,now for Vortec its under the upper plenum-
Jan 4, 2010 at 5:49 PM
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