[Code of Federal Regulations]
[Title 40, Volume 30]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR1065.520]

[Page 669]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 1065_TEST PROCEDURES AND EQUIPMENT--Table of Contents
 
                   Subpart F_Running an Emission Test
 
Sec. 1065.520  Engine starting, restarting, and shutdown.

    Unless the standard-setting part specifies otherwise, follow the 
steps in this section to start and shut down the test engine:
    (a) Engine starting. Start the engine according to the 
manufacturer's recommended starting procedure in the owner's manual, 
using either a production starter motor or the dynamometer. Use the 
dynamometer to crank (or motor) the engine at the typical in-use 
cranking speed with a fully charged battery (nominal speed 10 percent), accelerating the engine to cranking speed 
in the same time it would take with a starter motor (nominal 0.5 seconds). Stop motoring by the dynamometer within 
one second of starting the engine. The cycle's free-idle period begins 
when you determine that the engine has started.
    (1) If the engine does not start after 15 seconds of cranking, stop 
cranking and determine the reason it failed to start. While diagnosing 
the problem, turn off the device that measures gas flow (or revolution 
counter) on the constant-volume sampler (and all integrators when 
measuring emissions continuously). Also, turn off the constant-volume 
sampler or disconnect the exhaust tube from the tailpipe. If failure to 
start is an operational error, reschedule the engine for testing (this 
may require soaking the engine if the test requires a cold-start).
    (2) If longer cranking times are necessary, you may use them instead 
of the 15-second limit, as long as the owner's manual and the service-
repair manual describe the longer cranking times as normal.
    (3) If an engine malfunction causes a failure to start, you may 
correct it in less than 30 minutes and continue the test. Reactivate the 
sampling system at the same time cranking begins. When the engine 
starts, begin the timing sequence. If an engine malfunction causes a 
failure to start, and you cannot restart the engine, the test is void.
    (b) Engine stalling. Respond to engine stalling as follows:
    (1) If the engine stalls during the warm-up period, the initial idle 
period of test, or the steady-state segment, you may restart the engine 
immediately using the appropriate starting procedure and continue the 
test.
    (2) If the engine stalls at any other time, the test is void.
    (c) Engine shutdown. Shut the engine down according to the 
manufacturer's specifications.