Failed smog again, only the 15mph test, something broken?

[BlackStar]

Well, failed again

1987 corolla SR5


however, I have noticed a trend, the only part of the test I fail is the 15mph test, and only the HC and CO part(the january test has the same pattern). Another thing that worries me slightly, is that all of the numbers have risen(compared to the january test). Full tank of 87 with seafoam, new oil, and even drove it hard before testing.

I asked the smog tech/mechanic his opinion, he suggested maybe the air pump. However, he recommended a full diagnostic before any further action be taken. I'm at the end of my rope, so i'll probably take the shop up on it (its a star smog shop). I just don't have time to figure it out.

Any ideas why only at the 15mph i fail? Is their a system that should be doing its job at that mph that just isn't working?

15mph: HC 530(max 134) CO 4.04 (max 0.58) NO 26 (max 847)
25mph HC 57 (max 76) CO 0.34 (max 0.49) NO 26 (max 786)

interesting, my 25 mph NO numbers went way down compared to January.

[JDM AE86]

Ahhhh the luxury of livin in California. ..........bwah haha

[BlackStar]

also, at 15mph, the Co2 is 12.0% and the o2 is 0.4%. at 25mph, the co2 is % 14.1 percent, and the o2 is 0.6%

so, its running rich at 15, but ok at 25? is their something that controls this on the car?

[dr.occa]

The carburetor may need a new rebuild and the cat may need to be replaced.

[BlackStar]

Their both new...

[cdixon311]

Looks like it's a problem with your cat or 02's. Seems like a few people have similar problems. Some people get the cat super hot before taking the test and have good results. It also seems like it could be a problem with the car not burning off fuel properly. Considering it's a new carb, it might need to be tuned a little better.

Do some reading on google to get some more ideas.

https://www.google.com/#q=15mph+HC&safe=off" onclick="window.open(this.href);return false;

[BlackStar]

The car is at shop now, and guess what they found! My new cat wasn't doing anything at 15mph. Furthermore, it was also not Cali legal. Haven't heard back from them, not I do know they are getting a good cat and hopefully install it and run the car again. Who'd a thunk.

[JDM AE86]

Mine passed with NO cat........oh yea TEXAS FTW

[cdixon311]

Who'd a thunk.

lol Jonas thunk it

[dr.occa]

So did i t pass yet?