To determine if high altitude operation is causing lack of power:
1. Examine the altitude performance curve, see Figure 12-4.
2. Based on the altitude curve data, , decide if high altitude is causing the lack of power.
[a] If your vehicle is operating above sea level, a loss of power will be encountered,
no further troubleshooting is required.
[b] If your vehicle is operating at or below sea level and there is a lack of power,
refer to section 12.11.
