Incorrect Reading on Hard Acceleration Above 15 MPH
- If voltage is noted but not vacuum, check thermosensor, EGR control switch, and vacuum hose or wire routing.
- If neither vacuum nor voltage were noted, check for vacuum at EGR bleed in air cleaner. If vacuum is present, check hose routing and EGR control valve.
- Check for ported vacuum at EGR control solenoid valve A outlet. If vacuum is found, clean orifice in vacuum manifold. If no vacuum, check for vacuum at EGR control solenoid valve A inlet. If vacuum, replace EGR control solenoid valve A and retest.