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1996 Infiniti I30 rough idle and white smoke

Tiny
YASU
  • MEMBER
  • 1996 INFINITI I30
  • 138,000 MILES
When the car is running for a long time all of the sudden when I am at the stop light the car start to get rough idle and when I step on the gas pedal white smoke comes out from the tail pipe. Could you tell me whats wrong with it.

thank you
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Monday, July 29th, 2013 AT 7:33 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,913 POSTS
It could be a couple things. One you won't want to hear, but I will tell you. As far as the rough idle, it could be caused by a vacuum leak, need of a tune up, a bad idle air control valve. The white smoke has me concerned. White smoke is usually the result of coolant entering the combustion chamber of the engine and burning with the gas. For coolant to get into the combustion chamber, either a head gasket is bad, a head is warped or one could be cracked.
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Monday, July 29th, 2013 AT 7:38 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Its running rough due to coolant entering the combustion chamber could be as stated above-
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Monday, July 29th, 2013 AT 7:58 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,913 POSTS
Raz, great to hear from you. Thanks for the support.
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Monday, July 29th, 2013 AT 8:17 PM

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