On Vehicle Lab (Check off  check boxes as you proceed)AT 261 – Lab 1: - Vacuum, Pressure, and Service Data – Chapter 2Name: _________________________________________ Date: _____________________________________What is the textbook definition of vacuum?_________________________________________________________________________________At what point (stroke) does the engine develop vacuum? ____________________________ SECTION 1 Measuring VacuumTools you will need:Any VehicleVacuum GaugeTool Board Engine vacuum can only be measured behind the throttle plate. A good way to locate where to install a vacuum gauge is to locate the brake booster, and then follow its vacuum line back to the intake manifold on the engine. You can use the vacuum line that goes to the brake booster; however you may need an adapter. Not all rubber lines on the intake are truly “vacuum” lines.On Vehicle Lab (Check off  check boxes as you proceed) Hook up a vacuum gauge to a vehicle, and let it idle. What does the gauge read? (Write your answer in Inches of HG) _________________ Briefly rev the engine to WOT (Wide-Open Throttle). What does the gauge read momentary?(Write your answer in Inches of HG) _________________ Disconnect the vacuum gauge from the vehicleExplain why the vacuum drops when the throttle was opened._________________________________________________________________________________What is the textbook definition of pressure?_________________________________________________________________________________At what point (stroke) does the engine develop pressure? ________________________ SECTION 2 Measuring PressureTools you will need:Any VehicleCompression GaugeTool Board Disable the fuel injectors or ignition system on your vehicle to prevent it from starting and running. Disabling the injectors or fuel system is the preferred method of testing compression. This is because if the fuel system is left functional, while the engine is cranking raw fuel is being sent into the crankcase and spark plugs. This will cause degradation of the engines oil, and foul the spark plugs. We will go a little more in depth in this process in the next few classes. Remove one spark plug from the engine. – Install the spark tester to the plug wire and ground. Hook up a compression gauge to a vehicle.1 Have an assistant crank the engine three times.Note the pressure developed on the engine. (Write your answer in PSI) _________________What is the state of the valves when the engine develops pressure? (Open or Closed) _______________Could the engine develop “good” pressure if there was a leak in the combustion chamber, explain your answer._________________________________________________________________________________What is the textbook definition of venturi?_________________________________________________________________________________What part on a vehicle uses the venturi principal?_________________________________________________________________________________ SECTION 3 Locating Engine Performance Service DataTools you will need:Mitchell's on DemandGiven the vehicles below locate the service information requested. You will find most of this information under the Engine Performance section of Mitchell's and then under Specifications.2000 Honda Accord DX (hint: you will need to look at the engine type and model number…. )1. How often should the air filter be changed under "normal" conditions? _________________________2. What if the engine was run under "severe" conditions (air filter)? ______________________3. How often should the spark plugs be changed under "normal" conditions? _________________________4. How often should the timing belt be changed under "normal" conditions? _________________________5. What if the engine was run under "severe" conditions (timing belt)? ______________________6. What engine cooling component should be inspected when replacing the timing belt? ______________________7. What is the minimum specification for cylinder compression for this vehicle and engine? _____________________8. What is the specification for valve clearance for this vehicle and engine?Intake _____________________________________ Exhaust _________________________________9. What is the specification for the resistance of the ignition coil? Primary ____________________________________ Secondary _______________________________10. What is the temperature should the ignition coil should be tested at? ____________________________11. What is the maximum resistance of the ignition wires (High Tension Wires) for this vehicle? ________________12. What is the spark plug type that should be used in this engine?NGK _____________________________________ Denso _____________________________13. Below, draw a diagram showing the firing order and distributor rotation for this vehicle;14. What is the proper fuel pump pressure for this vehicle?2W/O Vacuum _____________________________________ W/Vacuum _________________________Matching:Match the correct letter to the correct statement below:Crank no StartA. Temporary complete loss of power. Engine quits at sharp, irregular intervals. May occur repeatedly or intermittently, usually worse under heavy acceleration.Cuts outB. Mild to severe pings, usually worse under acceleration. Engine makes sharp, metallic knocks that change with throttle opening. Sounds like popcorn popping.DetonationC. Engine runs after ignition switch is turned off. Runs unevenly and may make knocking noises.DieselingD. Momentary lack of response as accelerator is pressed. Can occur at all speeds. Usually most severe when starting from a stop. May cause engine to stall.HesitationE. Pulsation or jerking that changes with engine speed. Exhaust has a steady spitting sound at idle or low speed. Not normally felt above 30 mph.MissF. Engine runs unevenly at idle. Car may also shake.No CrankG. Engine delivers limited power under load or at high speed. Won't accelerate as fast as normal. Loses too much speed going up hills. Has less speed than normal.Rough IdleH. Less-than-anticipated response to increased throttle opening. Little or no increase in speed when accelerator is pushed down. Continuing to push pedal down will finally give an increase in speed.SluggishI. Engine stops running or dies out. May occur at idle or while driving.SpongyJ. Vehicle speeds up and slows down with no change on accelerator pedal. Can occur at any speed.Stall K. Car engine will