2003 Chevy Astro car buck at highway speed

2003 CHEVROLET ASTRO
152,000 MILES • 6 CYL • 2WD • AUTOMATIC
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CPOTCHINSK
  • MEMBER
  • 2 POSTS
My van was"bucking" today when I was on the highway .it seemed to happen only ayt speedds over 60 mph .What could it be?it almost felt like the transmission .
Aug 24, 2009 at 8:57 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
I would start by checking the fuel pump pressure to make sure it is producing. Chances are it is weak.
Sep 3, 2009 at 7:27 AM
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