Notes On Intermittents

Code EO34 is usually set by a vacuum supply problem to the MAP sensor. Check for proper vacuum routing. Apply vacuum to the MAP sensor and look for leaks in MAP sensor. Manipulate affected wiring and connectors while observing ECM data ED02 Apply and release vacuum to the MAP hose using a vacuum source. If the ECM data display jumps high with vacuum applied, the failure has been induced and the cause of the intermittent can be repaired. If wiring and connectors check out OK, substitute a known good MAP sensor and retest.