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Forum: General Maintenance and Repair

01-30-2012, 05:15 PM

Replies: 15

92 VX failed smog too high HC

Views: 3,658

Posted By thewizard182

Re: 92 VX failed smog too high HC

So it's time to smog again, and I'm having issues again.
When it goes from the high rpm test to the low rpm test the HC maxes the machine at 2000 for several seconds. The number otherwise ranges...

Forum: General Maintenance and Repair

01-28-2010, 01:59 PM

Replies: 15

92 VX failed smog too high HC

Views: 3,658

Posted By thewizard182

Checked all vacuum lines and they look good. ...

Checked all vacuum lines and they look good.
With the fed ECU in it I am still getting 40-45mpg mixed driving, best is 51 all highway.
It appears the cat is original and might just be time to...

Forum: General Maintenance and Repair

01-28-2010, 01:56 PM

Replies: 15

92 VX failed smog too high HC

Views: 3,658

Posted By thewizard182

On the vx the cat is directly attached to the...

On the vx the cat is directly attached to the exhaust manifold. Pretty sure it's the cat I'm looking into, it's honycomb patterned like I would expect.

Forum: General Maintenance and Repair

01-27-2010, 01:53 PM

Replies: 15

92 VX failed smog too high HC

Views: 3,658

Posted By thewizard182

Pass, but barely. 750 rpm co2 10.7 ...

Pass, but barely.

750 rpm
co2 10.7
o2 5.7
hc max 120 meas 101
co max 1.00 meas 0.03

2450 rpm
co2 14.2

Forum: General Maintenance and Repair

01-26-2010, 08:07 PM

Replies: 15

92 VX failed smog too high HC

Views: 3,658

Posted By thewizard182

Also I've pulled out the o2 sensor and can see...

Also I've pulled out the o2 sensor and can see into the cat, it's grey brown colored and isn't obviously damaged or covered in a ton of crap.

Forum: General Maintenance and Repair

01-26-2010, 08:02 PM

Replies: 15

92 VX failed smog too high HC

Views: 3,658

Posted By thewizard182

I've read about the burning stuff off the cat...

I've read about the burning stuff off the cat idea.
I might give it a try. Also it looks like adding some denatured alcohol to the gas tank can help lower hc as well. My registration is due, so at...

Forum: General Maintenance and Repair

01-26-2010, 03:05 PM

Replies: 15

92 VX failed smog too high HC

Views: 3,658

Posted By thewizard182

92 VX failed smog too high HC

Anyone have readings from their o2 sensors? Either stock or otherwise?

I used this post to get my readings:
https://www.gassavers.org/showthread.php?t=2427

This is with the CA ECU on it....

Showing results 1 to 7 of 7

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