Step 1 - Vehicle Preparation
• Check that there are no obvious safety hazards (abnormal engine noise, overheating, leaking fluids, etc.). Inspectors may reject a vehicle that is unsafe to test.
• Place the transmission in “Neutral” or “Park,” with the parking brake on and/or wheel chocks in place.
• Turn off all accessories (including air conditioning).
• Ensure the vehicle is at normal operating temperature.
• Position the vehicle to ensure there are no drafts that can disturb the exhaust plume.
• Ensure there is nothing in the shop environment, such as equipment or tool boxes, which
prevents the inspector from clearly observing the exhaust plume. In general, this will require
clearing the line-of-sight as much as 15 feet from the tailpipe(s).
Step 2 - Test Preparation and Vehicle Familiarization
• Use any means necessary to enable observation of the vehicle’s exhaust plume, including but not limited to, adjusting the seat and mirror positions.
• Perform the first of three BAR Snap Tests: - Gasoline If using the BAR-97 EIS, the first snap shall be performed at the beginning of the inspection when the EIS screen enables you to stabilize the RPM. If using the OIS, perform the first snap when prompted.
• Ensure the vehicle’s engine RPM falls between 2,000 and 3,000 while performing the first BAR Snap Test. If it does not, you can do one of the following: - Press-and-release the accelerator pedal more quickly or more slowly as needed to stay within the designated RPM range; or - Quickly press the pedal only part way to the floor before releasing it.
• Do not check for smoke during the first BAR Snap Test. Any visible smoke observed during
the first BAR Snap Test shall not result in a failure.
Remember while performing the smoke snap test, you notice there is smoke on the first snap only, and the remaining two there is no evidence of smoke . This vehicle will pass the smog inspection. The first snap doesn't count during this test procedure.
Step 3 - Perform the Idle Test
• Have the engine running at idle and go to the vehicle’s tailpipe.
• Perform the Idle Test:
- Gasoline If using the BAR-97 EIS, the idle test shall be performed immediately after performing the ASM/TSI test, if these tests are performed. If using the OIS, perform the idle test when prompted.
• Observe the tailpipe(s) exhaust plume of the vehicle for 10 seconds.
Step 4 - Perform the Crankcase (PCV) Test
• After performing the Idle Test (Step 3), continue to leave the vehicle’s engine running at idle and go to the vehicle engine compartment. Open the hood to the engine compartment and determine whether any smoke is coming from the crankcase (PCV) system.
• Observe the vehicle’s crankcase system for 10 seconds.
Step 5 - Complete the BAR Snap Test
• Continue to leave the vehicle’s engine running at idle.
• Perform the final two BAR Snap Tests just before starting the under-hood visual inspection.
• Perform the second BAR Snap Test while watching for visible smoke.
• Return the engine to idle, and wait for at least 3 seconds to allow the engine to stabilize.
• Perform the third (and final) BAR Snap Test while watching for visible smoke.
Step 6 - PASS/FAIL Determination
• PASS the vehicle for the Visible Smoke Test portion of the Smog Check inspection if the vehicle does not emit smoke during the Idle Test, Crankcase Test, and both of the final two BAR Snap Tests.
• FAIL the vehicle if: - There is any visible smoke observed during the Idle Test; - OR there is any visible smoke coming from the crankcase (PCV) system; - OR there is:
• Gasoline - any visible smoke observed between the tailpipe and 10 feet from the tailpipe(s) on either of the final two BAR Snap Tests.
• Smoke from any area other than the vehicle’s tailpipe(s) or crankcase (PCV) system, regardless of the cause, does not constitute a failure of the Visible Smoke Test.
• No vehicle shall be failed for condensation or steam.
Step 7 – Enter the Test Results into the EIS or OIS
• Results must be entered in the visual inspection’s “Other Emission Related Controls” category on the EIS or at the “Enter Result of the Exhaust System Smoke Check” and “Enter Result of the Crankcase System Smoke Check” OIS prompts.
• For vehicles that pass all portions of the Visible Smoke Test, enter “P” (Pass).
• For vehicles that fail any portion of the Visible Smoke Test, enter “F” (Defective).
The BAR-97 EIS currently allows only one entry for the visual inspection of all components
covered under the “Other Emission Related Controls” category. Therefore, if the vehicle passes
all portions of the Visible Smoke Test, but fails a visual check of any other component covered
under the “Other Emission Related Controls” category, enter the appropriate failure code.
However, if the vehicle passes the visual inspection for components covered under the “Other
Emission Related Controls” category, but fails any portion of the Visible Smoke Test, enter “F”
(Defective) into the EIS.
Step 8 - Documentation Provided to the Customer
If the vehicle fails the Visible Smoke Test, the inspector shall:
• Document the failure on both the customer’s and station’s copy of the Vehicle Inspection Report (VIR) in the “Other Emission Related Components” section. Make a clear notation on the VIR, such as “Failed Visible Smoke Test”. Document what portion of the Visible Smoke Test the vehicle failed, such as “Crankcase Smoke,” “Idle Smoke,” and/or “BAR Snap Smoke.”
• Document the failure on the customer’s invoice with “Failed Visible Smoke Test”. Document what portion of the Visible Smoke Test the vehicle failed, such as “Crankcase Smoke,” “Idle Smoke,” or “BAR Snap Smoke.” click here BAR Site