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Engine misfiring/jerking while accelerating - high pitched screech during symptom. What is the cause?

Tiny
CBANEK
  • MEMBER
  • 2003 NISSAN XTERRA
  • 130,000 MILES
My 2003 Nissan Xterra SE seems to misfiring/jerking when I am accelerating, specifically when I am in 3rd gear. There is a high pitched screech that is heard during this symptom as well. There is no check engine light that is on. What do you think is the problem and what diagnosis process should I proceed with?
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Tuesday, June 12th, 2012 AT 12:05 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuel pressure and hook up a vacuum gauge to intake manifold. If it's 15" or less suspect a partially clogged converter. Also check for a vacuum leak, hoses off/pinched/holes etc.
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Tuesday, June 12th, 2012 AT 12:13 AM

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