what cause the 2003 toyota premio engine to buck

2003 TOYOTA 4RUNNER
130,000 MILES
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JAKE
  • MEMBER
  • 2 POSTS
mostly when it going up hill it bucks or shut down. Sometimes you have to beat the gas pedal for it to go out
Jan 24, 2012 at 3:30 PM
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MHPAUTOS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 31,937 POSTS
Check fuel pressure and change filter, check plugs, leads and coil and do a scan for any unresolved fault codes, start here.
Jan 24, 2012 at 9:46 PM
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JAKE
  • MEMBER
  • 2 POSTS

Thank for your reply but we change the fuel pump and filters and it the same problem we also change the return pump and it not retunning
Jan 25, 2012 at 5:59 PM