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

Tiny
MIKEREICHE
  • MEMBER
  • 1998 FORD
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')
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Tuesday, September 26th, 2006 AT 1:42 PM

4 Replies

Tiny
CATCH_15
  • MECHANIC
  • 250 POSTS
You could have an EGR problem, bad O2 sensors, or a catylitic converter that needs replaced.
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Tuesday, October 24th, 2006 AT 12:38 PM
Tiny
MIKEREICHE
  • MEMBER
  • 3 POSTS
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.
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Tuesday, October 24th, 2006 AT 3:26 PM
Tiny
CATCH_15
  • MECHANIC
  • 250 POSTS
That sucks. I hate it when I spend a bunch of money and it was something simple. It happens to the best of us.
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Tuesday, October 24th, 2006 AT 4:20 PM
Tiny
DIGGSJJ
  • MEMBER
  • 2 POSTS
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.
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Wednesday, November 22nd, 2006 AT 10:12 AM

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