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Failed Emissions Test in Chicago, IL area

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Buick in Olds

New Member
Joined
May 4, 2003
Messages
12
Have an 84 Olds Cutlass Supreme with a 3.8L. The motor was a new GM rebuild. Pulled stock cam and installed one from Lazer Cams. Intake was replaced with a 4.1L and the stock Quadrajet was rebuilt by a local mechanic. The CAT is the old one that was on the car before rebuild, am running duals from the CAT back. Stock HEI with exception of a hotter coil from Mallory. Did not reinstall the air pump and plugged the fitting on the CAT.

Took the car in for emmisions test today and it failed. The readings were:

HC - Me 2.10 / Standard 2.0
CO - Me 57.2 / Standard 30.0
CO2 - Me 471.5 / Standard N/A

Test type is IM240 run on a DYNO. Waited in line 20 minutes before test.

Any suggestions to improve test results.
 
Let's look at basics first. Plugs new, air filter new, AC Delco EGR valve and PCV valve, plug wires okay? If so, then it looks like it's rich. May need to jet the mains down a little. Is that possible?
 
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