>From Jason:
Here's what I'm thinking:
- - The cat is less than 2 years old (15,600 miles)
I don't think that's the problem
- - The O2 sensor is almost 6 years old (57,500 miles)
Might need a new one of those
- - Brand new PCV (7 miles before the test)
- - Oil changed the day before the test
- - I put half a can of Seafoam in the tank 20 miles before the test and
topped up with 1/4 tank of "superclean" premium.
Could it still have been burning out the junk that got loosened up?
This year's results:
Driving Test
- ------------
HC ppm: 124 (Fail), limit 52
CO %: 0.84 (Fail), limit 0.29
NO ppm: 2155 (Fail), limit 735
RPM: 1714 (Valid)
Dilution: 14.9 (Valid)
Idle Test
- ---------
HC ppm: 229 (Fail), limit 200
CO %: 1.46 (Fail), limit 1.00
NO ppm: N/A
RPM: 609 (Valid)
Dilution: 15.6 (Valid)
>>>>>>>>>
Couple questions:
Does it burn any oil? Thinking belly pan or rings wearing out.....if so
the oil may have fouled the cat.
I know that seafoam loosens up and allows crud to burn off, this could
be contributing. Additionally, higher octane causes the gas to burn
slower which could also be contributing, to the high HC numbers.
What is the condition of the theromstat modern engines like to run on
the hotter side and a cold stat may impact emissions.
Jim
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