1998 Mazda 626 Fails Smog / HC @ 15mph = 66 (max 56)

1998 FORD
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MIKEREICHE
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My 1998 Mazda 626 Fails Smog / HC @ 15mph = 66 (max 56)

After a tune-up (new plugs, wires, air filter, fuel filter), it gets exactly the same reading.

There are no diagnostic codes.

Any ideas? Thanks in advance,

- Mike

(yes, I already posted in "other" - I didn't expect to find 'Mazda' under 'Ford')
Sep 26, 2006 at 1:42 PM
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CATCH_15
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You could have an EGR problem, bad O2 sensors, or a catylitic converter that needs replaced.
Oct 24, 2006 at 12:38 PM
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MIKEREICHE
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Thanks for your suggestions.

After a $700 in repairs and two trips to the smog station, I decided to look at it myself and found a disconnected vacuum hose.

After reconnecting the hose, it passed.
Oct 24, 2006 at 3:26 PM
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CATCH_15
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That sucks. I hate it when I spend a bunch of money and it was something simple. It happens to the best of us.
Oct 24, 2006 at 4:20 PM
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DIGGSJJ
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Sorry to hear about that; mine can't pass emissions because of that stupid check engine light- I haven't yet made those repairs (upper cat conv) -let me go check the vacuum hoses to see if that could be a problem. In MD, they don't even test the emissions, they hook up an OBD-II tool and just read the ecm.
Nov 22, 2006 at 10:12 AM