When performing a stall test, the throttle should be held wide open for ten seconds.

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During a stall test, the throttle should not be held wide open for ten seconds as this can cause excessive heat and potential damage to the transmission. Stall tests typically involve a brief application of power with the vehicle's brakes applied to assess the performance of the transmission and torque converter, but the engine should not be run at full throttle for extended periods during this test.

When Performing a Stall Test, the Throttle Should Be Held