Question about 1999 Chevrolet Blazer
I have a 1999 Chevy Blazer, the check engine light (p0420 - catalyst efficiency below threshold) came on about 6 months ago. A mechanic told me not to worry about it. This morning the engine starting missing and a new code appeared (p0303 - cylinder number 3 misfire). I replaced the plugs and wires but this did not fix the problem. Is this all due to the catalytic converter?
Most probably and if a cat is not flowing proper is causes back preasure that can result in sticking or burned vavles,mechanic not nice by saying ignore the cat effiency code p0420.Can ussually have cat replaced at aftermarket muffler shop for approx. $200 cheaper than valve job or excessive fuel that you have used and damage that may occur to your engine.
Posted on Jun 16, 2009
My 98 gmc gimmy has cylinder misfire and run rough
Posted on Aug 12, 2011
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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 repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Jan 26, 2016 | Cars & Trucks
Nov 13, 2015 | 1997 Ford Explorer AWD
Aug 04, 2014 | 1999 Chevrolet Blazer
Dec 13, 2011 | 1999 Mercury Cougar
Aug 21, 2010 | 2001 Volkswagen Golf
May 31, 2010 | 2001 Nissan Altima
Nov 13, 2009 | 2000 Subaru Outback
1,437 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: