ROUGH IDLE AFTER START UP AND OCCASSIONALLY THE ...

2004 Buick Rendezvous

Tiny

slillie

November, 18, 2012 AT 1:58 PM

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

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6 Answers

Tiny

hmac300

November, 18, 2012 AT 2:52 PM

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.

Tiny

slillie

November, 18, 2012 AT 3:05 PM

Code is P0302

Tiny

hmac300

November, 18, 2012 AT 3:18 PM

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

Tiny

ASEMaster6371

November, 18, 2012 AT 4:16 PM

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

Tiny

homer1967

November, 24, 2012 AT 12:20 AM

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.

Tiny

homer1967

November, 24, 2012 AT 12:20 AM

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.

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