1988 Nissan Sentra Car is having high and low idle problems

1988 NISSAN SENTRA
210,000 MILES • 4 CYL • 2WD • MANUAL
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NOELROBERTSON
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  • 1 POST
i"ve been told is could possible be a vacuum leak that is causing my idle to go very high then so low it stalls. Where do I check for a vacuum leak or what else could be wrong? I've replaced the MASS valve and the oxygen sensor. Ive set the timing & idle and right after when i drive it the idle immediantly starts going up and down again. Please help?
Aug 4, 2010 at 5:09 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Check for vacuum leaks at the intake manifold and vacuum hoses-could also be caused by by the IACV-AAC valve, EGR valve and the throttle positon sensor-
Aug 4, 2010 at 6:16 PM
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