sputters bad

1972 FORD F-100
86 MILES
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ROSSCOG
  • MEMBER
  • 1 POST
My ford 390 with a holley 500cfm sputters badley when under a load and acceleration. but idles fine. any ideas changed accelerator pump. messed with timing advanced to retarded no help,
Jul 25, 2012 at 7:52 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Check to make sure the accelerator pump is working properly. Make sure there are no vacuum leaks, make sure the fuel pump is supplying enough fuel.
Jul 25, 2012 at 8:55 PM
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