Emission Test Failed - Why?

Hydrocarbon's are caused by excessive fuel (running rich). I have to wonder if the test was performed correctly... Most of the cars that fail, fail due to improper testing. The Catalytic Converter (Exhaust) must be extremely hot for it to operate as designed. Did he let the car just Idle before the test? or Did he go on a quick road test?

The best way to pass a vehicle that is border line failing is to put Premium Fuel in a few days before you E-test. The day of your E-test, take your vehicle out for a good run on the highway. This will heat up the Catalytic converter which would greatly reduce your emissions. Additionally, a oil change prior to the test will also reduce the emissions.

Almost all vehicle's, other then extremely poorly running engines will pass if you follow these few steps

I'd be very curious to know of the readings on your prior emissions test. Would make an interesting point of comparison -- e.g., were you already marginal last time?

3~4 months shouldn't have "soured" your gas. I'd start by looking for any and every reason that you might be running a rich mixture.

If you're going to look at O2 sensors yourself:

For a '94 without the advanced OBD2 codes, I'd take a direct reading on both front and rear O2 sensors with the engine warmed and running. Your Camry may run smooth even with O2 sensors that are very marginal. The fallback routines work well. To really see the voltage swing, you'll want an analog meter (digitals just don't update fast enough to be very accurate in this test) or even better, an oscilloscope!

Ontario Car Emission Test

The car should be obd2 but if made in Canada for Canada may not be because they went to obd2 for there cars in 1998 but if obd2 compatible the check engine light should work key on engine off. If it does great. If the light is off when running no codes present if light is on codes are present. Take a look by the fuse box cover lower left of steering wheel. There should be a diagnostic connector there. If you want to pull code and is obd2 compatible you can buy a code puller for the car for under $20.00 you can retrieve codes. You can also try some parts stores they sometime pull codes for free you and tell you what code is. I would 1st drive car until all old gas is gone or close to empty then refill note gas is only good for about 30 days. Note You can check timing by jumping E1 and T1 under the hood in the diagnostic connector box. But do that after the old gas is gone. Note all timing specs are + or - 2 degrees with high hc you will want to set the timing back 2 degrees. If advanced will raise hc. Your timing spec there is 10 degrees. Take your time is setting timing that distubor is a but tricky to get at. Try that 1st. The next thing to do is put a scope on the o2 sensors and check there switching ability's. That is a bit more tricking if you not comfy with a scope. Hope this helps.

Try changing your oil. I know this sounds ridiculous, but it can actually cause a pass or fail result. Dirty oil in your crankcase can contain enough hydrocarbons to fail your emissions test. Also, check your positive crankcase valve, or PCV. These can become loaded up with sludge and cause your evaporative system to fail as well.

And whoever suggested that you put camping fuel in your tank is not a mechanic. That type of fuel could destroy your fuel injectors, given the amount of alcohol in it.

Being you're so close to passing some maintainance should do the trick, spark plugs & wires, also a distributor cap & rotor if that car has them. also if the oxygen sensors are original you should probably replace them too. this will also give you better fuel economy

Your CO readings are very close to fail. An O2 sensor diagnosis would be helpful. You could also advance your timing 2-3 degrees also.

It is probably the oxygen sensor. That was the culprit when my last car failed the emissions test in Chicago.

pull the plugs and look..I wouldnt be putting crap like coleman fuel in it.. is it showing codes? a simple tune may do it . a differnt brand of gas and some fuel injector cleaner nay do it .You are clost to passing.

pull theplugs and see if they are all black with soot.if they are black,then it might be the cat or the 02 sensor is bad.