Vehicle failed for hydrocarbons badly, what could be the fix?

Question

I done a full tune up, new distruber cap, cables, sprak plug.... new PCV valve new air filter

still planing on taking EGR valve off and cleaning it

after i did all this the hydrocarbons ppm went up another 100, few mechanics told me it went up due to better and full combustion creating more exhaust

Hydro carbonsa readings are now almost 500ppm and inspections requires less then 220ppm

I do all the work myself was thinking maybe replacing the Catlic convertor and the oxygen sensor

What else should i do?

Answer 1

A new cat might fix it, but if you're pumping out a ton of unburnt HCs, the new cat will fail soon.
The mechanics are morons. Perfect combustion would mean a zero hydrocarbon reading. The higher the reading, the less efficient the combustion. And the reading is a ratio. More exhaust wouldn't mean a higher ppm.
A bad O2 sensor can cause very rich or very lean mixture.
If it's running smooth at idle, you're probably hitting all cylinders, so that wouldn't be it.
It's hard to say much without knowing anything about the type of car. If it's a carb, it could be something as simple as a bad choke heater.

Answer 2

Are you burning oil or running the carb/fuel system too rich?

If you are burning oil, or excessive exhaust gases are getting into the crankcase, try the product Restore. While it's relatively expensive, Restore does work to reduce the amount of blow-by in the cylinders. It should also reduce the amount of oil getting to the cylinders. A compression test of the cylinders will tell you if you have a problem there or not.

Note, if Restore solves the problem, while it will help extend the life of the engine by maybe a few years, you are looking at a shot engine that will need to be replaced or re-built sooner rather than later.

Answer 3

You excluded the most important information of all-what kind of vehicle is it?(year, make, model)
Is the "check engine" or Service Engine Soon yellow light on?
A bad catalytic convrter would cause those readings, a good cat will definately drop them down, provided everything else is right.

Answer 4

You know, if you live in Texas, the state will give you a check for $3500.00 towards a down payment on a new or warrantied used car.

Answer 5

well the sensor might be the first way to go , cats cost a lot of money .also try using a higher grade of gasoline ensuring a cleaner burn .