Sometimes hard to start

2003 BUICK CENTURY
175,000 MILES • 3.1L • 6 CYL • 2WD • AUTOMATIC
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BILLHVAC
  • MEMBER
  • 8 POSTS
No check engine lights on. Very seldom excessive pumping gas pedal required to get started. But before it gets started I hear a little puff of air sound like a back fire, but not as loud. Then it starts. It has been doing this before I had problems with VSS and fuel system. i replaced EVAP purge solenoid and fuel PSI regulator, fuel tank, PSI sensor and MAF sensor. Had valve job done several months ago. Wires plugs one coil PAC. Also maybe unrelated,I took fuel tank down. Where tank vent hose is i have got a 3/8 in hose two feet long come off tank unhooked. Looks like it has been there for a while. Spider web inside. Please help. Thanks.
Jun 29, 2017 at 3:15 AM
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HMAC300
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 48,601 POSTS
check fuel pressure with a gauge as that may be low auto parts rent gauge. there should be no hoses hanging it may be a vent hose for tank check at filler neck. then check for a vacuum leak. See link for fuel pressure.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Jun 29, 2017 at 5:48 AM
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