Why does the emission inspection failed almost every time its due for DMV inspection?
Thank you.
My car has 3485 miles.
My car has an automatic transmission.
Honestly, the lack of consistent driving could be the reason why you have frequent emissions issues. If the car does not run frequently and have an opportunity to circulate built up carbon deposits on the inside of the fuel injection system or exhaust system, failed emissions testing may be the result. The best thing to do is to drive your vehicle once or twice per week about a month or so before your emissions testing is needed. Also, it’s a good idea to replace air filters frequently before emissions testing is completed. This article is a good one that helps many car owners learn what they can do to help improve emissions testing.
How to Identify and Fix Common car Problems ?
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If the O2 sensor is bad, your vehicle won`t pass an emissions test because there will either be too much or too little oxygen in the exhaust, which affects the other emission gas levels.
Will a bad O2 sensor cause rough idle and loss of engine power? You bet. Moreover, you may also notice poor acceleration, engine misfires, and even stalling. Bad oxygen sensors disrupt all kinds of essential engine functions, including engine timing, combustion intervals, and air-fuel ratio.
check engine light is on: if the car`s computer finds an evap system leak, including one from a cracked charcoal canister, it will turn on the check engine light. likewise, it will turn on the light if it determines there isn`t enough airflow due to a clogged canister.
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Honestly, the lack of consistent driving could be the reason why you have frequent emissions issues. If the car does not run frequently and have an opportunity to circulate built up carbon deposits on the inside of the fuel injection system or exhaust system, failed emissions testing may be the result. The best thing to do is to drive your vehicle once or twice per week about a month or so before your emissions testing is needed. Also, it’s a good idea to replace air filters frequently before emissions testing is completed. This article is a good one that helps many car owners learn what they can do to help improve emissions testing.
From what you are explaining, it sounds like the fuel pump is failing. When the fuel is low, the pump will get hot and a weak pump will lose pressure causing this to occur. I would usually check the fuel pressure to see if it is low, especially when the fuel level is low. If it is, then the pump needs to be replaced. If you plan on having this done, consider YourMechanic, as a certified technician can come to your home or office to diagnose the hesitation problem and guide you with repairs.
There are two separate sets of marks on this system. One set is for aligning the timing chain to the camshaft gears and the intermediate shaft gear. There will be marks on the chain that raps around the crankshaft gear as well. These marks will not line up after you turn the motor over.The other marks are on the inside of the camshaft gears and align with the cylinder head parting line. If you were to draw a ling through the center of both camshaft gears, they should line up with that imaginary line.
The crankshaft key way should be aligned with the mating face of the main bearing cap. You can confirm it is in the correct position by verifying the number one piston is at top dead center. If you have removed the balance shaft timing chain, these marks really need a visual diagram to understand where they should be aligned. Without a diagram I am not very confident it can be explained very clearly.
This may be difficult to to follow, so again I highly recommend purchasing a repair manual in digital form or a book. If you feel this is over your head, I recommend the following inspection to help you out. Timing chain replacement
Good luck! I hope I was able to help you.
When the engine is running, the fuel vapors are purged from the canister and burned in the engine. The vent control valve (solenoid) controls the flow of outside air in and out of the charcoal canister. When this solenoid is not working properly, this may cause the tank to fail to expel the vapors as it is designed to causing the failed emissions test. If you would like to have the car scoped out, a certified professional from YourMechanic can conduct a comprehensive diagnostic on your car before you take it in for another emissions test.
A loose or corroded connector on the thermostat
A coolant leak in the cooling system – make sure that all connections are tight
The thermostat could have failed – stuck open or partially open
There could be a short in the wiring harness between the computer and thermostat
The ECM (computer) has failed – Only in the event that all areas have been check and are all functional
Once the engine light is off and the engine is running correctly, you would be able to retest your vehicle at the emissions in your state. If you need further assistance with your check engine light on, then seek out a professional, such as one from Your Mechanic, to help you.