BCDD Operating Pressure
- To check pressure, engine should be at normal operating temperature, idle speed set to specifications and transmission in Neutral. Connect a tachometer to engine and a vacuum gauge to intake manifold.
- Run the engine under no load and note vacuum reading. Increase engine speed to 3000-3500 RPM on Maxima and 280ZX models or 2000 RPM on Stanza models, then quickly close the throttle.
- 3-77)
Manifold vacuum should increase 23.6 in. Hg or more on Maxima and 280ZX models or 24.0 in. Hg or more on Stanza models, then gradually decrease to level noted at idle on all models. If BCDD operating pressure at idle is not to specification, proceed to ADJUSTMENTS section in this article. BCDD OPERATING PRESSURE (At Sea Level)
Application Pressure (In. Hg) Maxima & 280ZX 21.6-23.2 Stanza 23.2-24.8