C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1992 engine mis fire

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Old Mar 29, 2018 | 07:32 PM
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captain cook
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Default 1992 engine mis fire

Any ideas would be appreciated. Car has 77k miles
Colorado has an emission inspection that the car failed. High CO
.I took the car to a local repair shop today and had the spark plugs replaced. Number four spark plug was fouled. As I drove off the mis fire was still there.
Any ideas on what to try next ? Plug wires? SHOULD i GET THE $100 engine diagnostics?
Thanks for any help..
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Old Mar 29, 2018 | 10:22 PM
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Originally Posted by captain cook
Any ideas would be appreciated. Car has 77k miles
Colorado has an emission inspection that the car failed. High CO
.I took the car to a local repair shop today and had the spark plugs replaced. Number four spark plug was fouled. As I drove off the mis fire was still there.
Any ideas on what to try next ? Plug wires? SHOULD i GET THE $100 engine diagnostics?
Thanks for any help..
i am assumng you are the same guy as before, so i will post the same thing.

O2 sensors
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Old Apr 4, 2018 | 11:42 PM
  #3  
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captain cook
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Thank you for the O2 sensor suggestion...

The new spark plugs and new O2 sensors lowered the CO for 18 GPM {state limit 15 } to under 3 GPM
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