Not sure why it failed.

I changed the oil, spark plugs, ran sea foam through it and did the guaranteed to pass thing through the tank. Filled it up with Cheveron 91, drove it up and down freeway right into smog shop.

I replaced the cat about 500 miles ago with a hunch that my old one was bad - new cat is good.

Car does not smoke, smells a little rich for first few minutes after I start it up but it goes away. Small amount of black soot on bumper.

Taking it back to the shop but they said it's about $100/hr and that's the norm for around here. But If I can tell them what to start with maybe that will lower the time - they said it'd take two hours so $200.

I don't have any check engine lights nor have I had any since I owned the car. The car only has a DC header and a cold air intake.

Attached are the pictures of my failed test and pictures of the spark plugs in case anyone notices something funny about them. The visual inspection says tampered because they didn't see my head sticker.

Only things I can think of..
Timing? Report says it was 17 BTDC
Sensor that calculates air/fuel ratio?

Helpppp

 

Try lowering your timing to 14 degrees, should help. What kind of cat is on the car? OEM is best. If you put an aftermarket "high flow" one, they don't always work so well in actually cleaning up emissions. Also try checking your distributor cap and rotor to see if they're worn.

 

How many miles are on the motor? Does it burn any oil? Have you done a compression check?

Make sure the Dist cap/rotor and plug wires are good. And retarding your timing a little should help.