1990 civic will not pass emissions test
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1990 civic will not pass emissions test
I have a 1990 civic 1.5l that will not pass emmisions test. high nox
i have put a new cat. new oxygen sensor , new air filter. oil change , coolant change , i have tried retarding the timing , no luck, at my wits' end .
any ideas?
caveboy
i have put a new cat. new oxygen sensor , new air filter. oil change , coolant change , i have tried retarding the timing , no luck, at my wits' end .
any ideas?
caveboy
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update:
found timing belt advanced 3 teeth on cam, also found out that "bosch" o2 sensors do not play well with hondas, changed o2 sensor to a "denso" now my car makes cleaner air than it takes in!!! passed emissions !!! BTW the car has 300k miles on it, still gets 38 mpg!!!!!
WAHOO!!! life is good once again!!!
caveboy
found timing belt advanced 3 teeth on cam, also found out that "bosch" o2 sensors do not play well with hondas, changed o2 sensor to a "denso" now my car makes cleaner air than it takes in!!! passed emissions !!! BTW the car has 300k miles on it, still gets 38 mpg!!!!!
WAHOO!!! life is good once again!!!
caveboy
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