Mechanics

ENGINE MISFIRING/JERKING WHILE ACCELERATING - HIGH PITCHED SCREECH DURING SYMPTOM. WHAT IS THE CAUSE?

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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Cbanek
June 12, 2012.



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.

Hmac300
Jun 12, 2012.