Question about 2004 Honda Civic
Failed mot for emissions and when u start the car up whether cold or warm,it revs up and back down continously.please help smells like its running rich,drives ok and all but at idle the revs keep going up to about 2500 rpm and back down
If its running rich and the idling is up and down suspect your oxygen sensors and sort as soon as otherwise it will destroy you catalistic converter [very expensive] yates210456
Posted on Oct 08, 2008
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 09, 2016 | Honda Cars & Trucks
Aug 07, 2017 | Cars & Trucks
Mar 06, 2011 | Volkswagen Cabriolet Cars & Trucks
Oct 05, 2010 | 1994 Honda Civic
Dec 16, 2009 | 1994 Honda Civic
Jan 05, 2009 | 1995 Honda Civic
Jan 02, 2009 | 1997 Honda Civic
Oct 29, 2008 | Honda Civic Cars & Trucks
308 people viewed this question
Usually answered in minutes!