FAILED CALIFORNIA SMOG

1990 GMC

Tiny

linvdan

August, 19, 2008 AT 6:51 PM

Engine Performance problem
1990 Other GMC Models V8 Four Wheel Drive Automatic 246000 miles

I just failed CA smog, my HC levels are as such
Idle- RPM- 1062, HC measures 173
2500 RPM- HC measures 400

What should I do to correct this? Truck seems to run fine.
Thanks

FOUND 660 RELATED QUESTIONS

1 Answer

Tiny

Jack42

August, 22, 2008 AT 12:19 PM

At that mileage, it could very well be the cat converter is all used up. They are a reactive material and will only last so long

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