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  #49353 Posted 5 Months ago
Fon
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Can someone help me I took in my 94 Chevy Truck for a smog test it failed with the following.

15 mph HC(PPM) Max = 113 Mine = 147
CO(%) Max= 0.57 Mine = 0.64
NO(PPM) Max= 980 Mine = 1530

25 mph HC(PPM) Max = 90 Mine = 136
CO(%) Max= 1.00 Mine = 0.61
NO(PPM) Max= 840 Mine = 1497

the shop wants $275 just to diagnose the problem.
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  #49355 Posted 5 Months ago
MyToyotaSucks
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Posts: 265
graphgraph
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When was the last time u replaced the O2 sensor?

If the O2 sensor was replaced in the last 2 - 4 years then The other way to clean up the emmissions is to use a HHO hydrogen on demand generator. (use at own risk)(there are some cheap units out There).
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