With Vehicle Control Module (VCM)

Testing the pressure regulator circuit is in CHART A-3 and A-6. Refer to A Charts. Under Computer and Controls/System Diagnosis/Procedures. Testing and Inspection

If the pressure regulator in the TBI supplies pressure which is too low (below 62 kPa or 9 psi), poor performance could result. If the pressure is too high, unpleasant exhaust odor may result.