Im having issues passing inspection in the state on TN. Im over the CO limit and the HC limit. Ive changed my air intake hose because there was a crack in it, however that didnt help anything. I have a can of carb/fuel intake cleaner but I do not know where to put it (dont laugh, Im just not a mechanical saavy guy lol). Is there anything I can do? Ive spent 1800 bucks on it in the past 2 months and I would like to not spend anymore.
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Re: Im having issues passing inspection in TN
Mcdevito75 here One way that will definetly heip is to cahnge the spark plugs, they burn the air &gas mixture in your enagine that make the emissions. It"ll be a good investment and you should pass inspection with no problems.
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The HC is high because the CO is high, CO is caused by to much fuel being delivered. You will want to check the Oxygen sensor and make sure it is functioning properly. You will want to check the fuel pressures, including rest pressure. We have seen leaking injectors cause this problem. You will want to make sure the thermostat is working correctly also.
First thing to do is check over the sensors that control the fuel mixture as it sounds like you're runnign too rich. This could be due to a faulty water temp sensor. If this is the problem then the ECU (Engine Control Unit / aka computer) will be leaving the car constantly 'on choke' and not reducing the fuelling as the engine warms - so unplug the sensor and clean the contacts on both sides with some switch / electrical cleaner (not WD40) and inspect the wiring for any signs of damage to the insulation especially where it runs over other components and through the bulkhead
If the engine is running well and the state of tune and ignition timing is good (15 degrees BTDC) then most likely the converter itself is bad. Usually NOx readings will go down as HC and CO readings go up, and as a result it is extremely rare for a car to fail an emissions test with all three things if the Catalytic Converter is working properly.
A bad oxygen sensor can also cause a failure similar to this, but will usually cause HC/CO readings to be high (but NOx readings would be low), or the opposite - high NOx but low HC/CO readings. The O2 sensor is located in the exhaust manifold just
before the bulge of the catylst and at the point where the 4 pipes join
Unfortunately there is no good way to test the Cat. Highly specialized equipment is necessary to do this, however a temperature test might clue you in to one that is bad.
After driving the vehicle for several miles, immediately check the temperature of the converter at the very front and the very rear of the unit itself. The rear should be at least 100 degrees (F) hotter than the front. If the two are close to the same temperature then it is proof the converter isn't working very well.
I have to note though that temperature testing is far from conclusive. I've seen converters that pass test with flying colors but still ended up needing to be replaced.
Aftermarket converters tend to be less effective than factory converters because they are not built specifically for your vehicle. Instead, a universal unit is welded into some exhaust pipes so that it will fit. Generally this isn't an issue, but if you live in a 'green' state such as California where emissions standards are very strict, it could pose a problem.
Sell the car to somebody in FL, no inspection. The state realized it was a total waste of money. Anyway, it probably is the cat, you have 3 or 4 O2 sensors, maybe more. The cat is shot, Just take out the cat, park the car in the street, Call the police in the morning and tell them somebody stole your cat. happens all the time, they go right down the road and cut out 100 cats a night, for $50 each, I don't blame them. The insurance co will buy you a new one if you have the right coverage. If not, you will have to buy a new one, because you can't use an old one. But you can sell the old one on ebay for $50. They are expensive to buy. Hope this helps.
possible but could be head gasket or valves , or worn rings and is by passing the pistons going straight out the end ...or maby settings are wrong ? try carb cleaner and inspect visually air-filter etc.
Well, if you didn't pass a state inspection, I can tell you how you may be able to work around it. Depending on state laws for car inspections.....I'll just give you an example: My fiance's car didn't pass inspection, but as long as she paid AT LEAST $200 to try and fix the problem, they HAVE to give her an inspection sticker for the year. We are in NC. Find out the law in your state, if you can't figure out the problem and need an inspection, spend the minimum trying to fix for now.....you'll have a year to figure it out.
have you had the the engine codes pulled and reset?
and if so what are your engine codes?
i dont know of any car that will pass emissions test with the engine light on.
we cure your trouble that caused your engine light to come on and you will pass your test.