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1993 Nissan 240SX bad idle running rich

Tiny
KASH3167
  • MEMBER
  • 1993 NISSAN 240SX
  • 93,000 MILES
Good morning how are you doing my problem is my car is idling rough it fluctuates between 1000 rpms and 500. Sputtering and pinging and eventually dies within twenty mins or more.I put my hand on the intake manifold and I realize that only cylinder one intake pipe is hot the other three are the same temperature cold what does this mean?I cleaned my maf sensore thought itd mite be dirty. Would really apreciate your help thank you
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Sunday, June 23rd, 2013 AT 8:18 AM

1 Reply

Tiny
FREEMBA
  • MECHANIC
  • 1,152 POSTS
Take the intake air cleaner snorkle offf and check the throttle body for dirty build up. If the thrrottle body is dirty clean it with the same solution as you used for the MAF. Be sure to clean the small air port that supplies air to the IAC (Idle Air Control).
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Sunday, June 23rd, 2013 AT 9:34 AM

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