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Old Feb 1, 2013 | 02:33 PM
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Originally Posted by Captain Hook
^^ X2

Follow the flow chart exactly as indicated and you'll find the problem:

https://blazerforum.com/forum/diagno...plained-35145/
I can only follow it so far then I need a scan tool...and a vacuum pump...
 
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Old Feb 1, 2013 | 03:40 PM
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lol. well when youve spent over 100$ on gas and almost 300 miles you tend to get pissed off doing the same thin over and over and over and nothing changing other then the money in your wallet
 
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Old Feb 2, 2013 | 11:12 AM
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Well now its done 2cycles and i got a p0420
 
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Old Feb 2, 2013 | 08:58 PM
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Checked again when i got home. It has p0440 now so p0420 first and p0440 second. Any ideas. Theres no unusal sounds or anything
 
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Old Feb 3, 2013 | 01:05 PM
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Always diagnose & repair DTC's starting with the first one that appears. P0420 is indicating a problem with the catalytic converter, if you follow this flow chart, it will pinpoint the problem. https://blazerforum.com/forum/diagno...plained-19820/
 
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Old Feb 4, 2013 | 01:35 PM
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well a few weeks ago i found out my EGR was unplugged so could cleaning it out and stuff maybe fix it by a small chance?
 
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Old Feb 4, 2013 | 04:47 PM
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If there was a problem with EGR, there would be a DTC in memory.
 
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Old Feb 4, 2013 | 10:59 PM
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Just makes you wonder
 
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Old Feb 7, 2013 | 10:35 AM
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welp. she needs a new cat conv, egr, vapor canister, and possably a canister vent valve. so shes parked :/
 
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