ROUGH IDLE AFTER START UP AND OCCASSIONALLY THE ...

  • Tiny
  • slillie
  • 2004 Buick Rendezvous
  • 111,000 miles

Rough idle after start up and occassionally the Service Engine Soon light will come on and then go off again.

Do you
have the same problem?
Yes
No
Sunday, November 18th, 2012 AT 1:58 PM

5 Replies

  • Tiny
  • hmac300
  • Expert
  • 44,341 posts

Scan for codes and check fuel pressure first. Then check for a vacuum leak. Also check for hoses with holes in them soft etc. Make sure the duct work ging to throttle body has no holes in it.

Was this
answer
helpful?
Yes
No
Sunday, November 18th, 2012 AT 2:52 PM
  • Tiny
  • slillie
  • Member

Code is P0302

Was this
answer
helpful?
Yes
No
Sunday, November 18th, 2012 AT 3:05 PM
  • Tiny
  • hmac300
  • Expert
  • 44,341 posts

You'll hav eto check your evap cannister for a hose off or bad solenoid or incorrectly routed hoses.

Was this
answer
helpful?
Yes
No
Sunday, November 18th, 2012 AT 3:18 PM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

302 is a missfire code for cylinder 2. It could be a plug, wire, coil, injector, vacuum leak or low compression. All these need to be checked to find the failure.

Roy

Was this
answer
helpful?
Yes
No
Sunday, November 18th, 2012 AT 4:16 PM
  • Tiny
  • homer1967
  • Expert
  • 902 posts

Based on the symptoms, the code and what this vehicle is I would suspect an intake leak when cold. Sometimes they only leak when cold then swell and seal up when warm.I would suggest that you take it and have a smoke test done by a shop.

Was this
answer
helpful?
Yes
No
Saturday, November 24th, 2012 AT 12:20 AM

Please login or register to post a reply.

Similar Questions