1995 Chevy Blazer After replacing the CPI truck runs rough

1995 CHEVROLET BLAZER
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JOE STEADERSTY
  • MEMBER
  • 2 POSTS
Engine Mechanical problem
1995 Chevy Blazer 6 cyl Four Wheel Drive Automatic

Also after running for a bit the catalytic converter glowed red hot . I replaced the catalytic converter and the #2 oxygen sensor and the spark plugs and it still ran very rough and the converter and the pipe to the muffler still glowed red hot . I didn't replace the #1 O2 sensor in front of the converter should I have replaced it too ? Also after it glowed red do you think that the new #2 O2 sensor and new converter is now bad or can it handle 1 time of being red hot ? Did I ruin the new converter and O2 sensor by running it till it was glowing red hot . The truck also has a fairly new muffler and tail pipe is it possible that it is plugged now do to running with red hot converter . so to recap I have installed a new CPI -Spider fuel Injector assembly and a new Catalytic converter , O2 sensor on downstream side and new spark plugs , air filter and oil too . I checked EGR and its not plugged and plunger moves ok . i checked the cap n rotor and they looked fine . So whats next move ? The truck runs real rough and missfires and hardly moves when put into gear .
Dec 11, 2009 at 7:02 PM
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SWILLIAMS
  • CAR REPAIR CONTRIBUTOR
  • 597 POSTS
Could be a few things. If you want to see if it's the muffler just disconnect it from the converter and see what it does then.
Does it use oil? You replaced the CPI, did you also replace the fuel line assemblies as well.
Where did the unit come from?
What does the timing look like?
CEL on?
Dec 17, 2009 at 11:54 PM
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