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1981 Nissan Van engine hesitation spluttering

Tiny
DIVIDEDMONKEY
  • MEMBER
  • 1981 NISSAN VAN
  • 4 CYL
  • 2WD
  • MANUAL
  • 180,000 MILES
My 1981 carberated nissan urvan is having a problem when under power to the extent that it canot be driven at all. While parked and the accelerator is depressed the engine splutteres and coughs with only enough power to build up the revs slowly but it is able to keep the revs with no problem its only while trying to accelerate, it even starts perfectly. I thought it might have been the fuel pump so I have replaced the old mechanical pump with an electrical pump and have checked flow and pressure.
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Friday, October 2nd, 2009 AT 11:29 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the carb's accelerator pump and power valve problem. When was the last time you gave it a tune-up?
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Friday, October 2nd, 2009 AT 11:44 AM
Tiny
DIVIDEDMONKEY
  • MEMBER
  • 2 POSTS
We've only just bought it and the old owners claimed to have had it tuned recently but chances are they didnt. The problem is pretty much at any throttle position above idle not just WOT, it does it at even 10% open if that helps. So does this mean pulling down the carb and cleaning everything and replacments or is it an adjustment?
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Friday, October 2nd, 2009 AT 12:02 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Chances are they didnt. Give it a tune-up and go from there.
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Friday, October 2nd, 2009 AT 12:05 PM

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