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12-24-2021, 01:35 PM
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#1 |
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Registered User
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,039
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2000 z71 5.3 code
Hi people--I have a po300 code with ck eng lt on. It only misses at idle, you can't feel it above 1000 rpm or above. I know this is a tough one as it could many different things. Have only had a bad coil in 97,000 miles. Have changed plugs and wires at 75,000. where should i start?
thanks
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1961 chevy K10 my build is------------61K10 build |
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12-25-2021, 01:33 PM
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#2 |
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Moderator
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,204
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Re: 2000 z71 5.3 code
Hi and Merry Christmas
The 0300 code refers to intermittent misfire detected by the O2 sensors.... Follow the check list in order. Faulty spark plugs Faulty spark plug wires Faulty coil Vacuum leak in intake system Faulty oxygen sensor(s) Faulty fuel injector(s) Stuck/blocked/leaking EGR valve / passages Faulty catalytic converter(s) Faulty camshaft position sensor Burned exhaust valve Defective computer As you mentioned it only misses at idle I would be looking for a vacuum leak as a priority. 
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Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox 
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12-27-2021, 02:59 PM
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#3 |
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Registered User
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,039
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Re: 2000 z71 5.3 code
update---moved my tk for coming snow and the eng lt went off and the miss did also but came back but no eng lt.
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1961 chevy K10 my build is------------61K10 build |
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01-04-2022, 05:31 PM
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#4 |
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Registered User
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,039
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Re: 2000 z71 5.3 code
still running good no eng lt no miss?
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1961 chevy K10 my build is------------61K10 build |
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