Question about 1999 Chevrolet Astro
The fuel pump works off the engines oil pressure switch upon first starting the engine. That switch makes the fuel pump prime for the 5 seconds as well
When the engine reaches the normal oil pressure the computer shuts that circuit off and turns the fuel pu,p relay circuit on to have the fuel pump to run until you shut off the engine
Posted on May 29, 2010
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Posted on Jan 02, 2017
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