Most caps incorporate positive and negative pressure relief valves that are designed to maintain an internal fuel storage tank pressure near atmospheric pressure. Fuel cap testing checks the cap to filler neck seal, and any pressure relief valves that are part of the cap. During a vehicle emissions test, the inspector is required to verify visible emissions do not exceed allowable limits.įuel tank filler cap testing is done to help ensure hydrocarbon (HC) vapors do not escape from the fuel storage tank to the atmosphere. The Vehicle Inspection Report (VIR) includes a Visual/Gas Cap results table that lists results of the visible smoke/emissions inspection, the gas cap pressure test and results of the tamper inspection.Īccording to the Utah Administrative Code, rule R307-201-3 for visible emissions standards No owner or operator of a gasoline powered engine or vehicle shall allow, cause or permit visible emissions and emissions from on-road diesel engines manufactured after January 1, 1973, shall be of a shade or density no darker than 20% opacity, except for starting motion no farther than 100 yards. This visual inspection for tampering helps to identify vehicles which may be emitting excessive pollutants, but are not being properly evaluated because of an improper vehicle modification. The emissions inspector conducts a visual inspection of the emissions related systems and related components for unauthorized or illegal modifications. The different vehicle emissions inspections that are used in the AirCheck Davis Program include: Be prepared to provide the following information: To determine the exact type of emissions test that applies to a specific vehicle, contact Worldwide Environmental Products (WEP) at (801) 546-8860. The AirCheck Davis County program mitigates the prevalence of these emissions as well as secondary pollutants such as ozone (O3) and very small inhalable particulates, and their impact on human health and our environment.ĭepending on the vehicle model year, weight rating, and fuel type, the emissions analyzer selects the appropriate test combination for the vehicle undergoing emissions testing. The inspections administered via the program identify gross polluting vehicles that emit excessive levels of harmful emissions. Please Log in or Create an account to join the conversation.For 2012, the AirCheck Davis County Program inspects all 1968 and newer light-, medium-, and heavy-duty vehicles licensed to operate on public roads. If it never goes below that, then the test will never run. How hot has it been in your area recently? One of the enable conditions is an ambient temperature of less that 86 degrees, or 30 degrees celsius. Service.gm.com/gmspo/mode6/pdf/2002/2002file4.pdfĭown on page 34 is the criteria for P0440. There's a fantastic PDF on GM monitor enable conditions that you can reference if you're looking at scan data: After sitting overnight, both sensors should read within a few degrees of one another. Mostly I'm interested in checking the ECT and IAT PIDs to make sure they more or less agree. I understand that you don't have a fancy scanner, but do you have access to scan data? Good ol' Global OBD data will work. I'm sure you filled up somewhere in there! I was going to ask about fuel level, as the EVAP monitor will usually only run between 3/4 and 1/4 fuel levels, but then you said you drove it 500 miles. A borderline O2, for example, can stop the whole process. For our information, is the EVAP monitor the only one that hasn't completed, or are there other monitors still incomplete? I ask because some vehicles are very picky about the order in which they run monitors.
0 Comments
Leave a Reply. |