I recently had my '89 GTUs' engine rebuilt by the Rotary Doctor in Neosho, MO and I couldn't be happier with his work. He did a phenomenal job in every aspect of the rebuild, et cetera. I've had the car since 8-4-07 with the rebuilt engine and drove it from SW MO back to the Houston, TX area and now have roughly 1,400 miles on it.

The problem is, I went to get it inspected and it passed every emissions test but the HC (hydrocarbon) one. It failed both at high speed ([25mph] 210PPM instead of the standard 168) and at low speed ([15mph] 310PPM instead of the 173 standard). Naturally, no one there could give me any advice and the gentleman who rebuilt it for me must not be at his shop when I called.

If any master rotary gurus out there have any advice as to how I should go about fixing this issue, it would be sincerely and greatly appreciated.

-Chris

 

High HC and low everything else means you have a bad converter or the wrong weight oil or your air filter is clogged and your spark plugs are bad.

BTW, this information is covered in the FAQ for FC sticky thread found at the top of this section. You will always want to read the FAQ for FC sticky thread before posting as it covers many of the commonly asked questions, (such as the one you started this thread with).

 

and:
J-rats Recipe for cheating emissions if its ABSOLUTELY necessary:

1. Turn variable resistor to full lean, or as lean as you can get and still run.
2. Trick ACV into pumping air to the cat all the time by removing the FORWARD UPPER vac hose, and capping it.
3. Run 87 octane
4. Run your tank down till your almost empty.
5. 2-3 bottles of alcohol in the tank. Drive VERY GINGERLY to the emissions station.
6. Once you pass go, DIRECTLY to a gas station and fill up with regular unleaded.