Brad's Car Manuals: A 3rd party mirror of CHARM + LEMON car manuals
Home >> Jeep >> 1987 >> Cherokee Limited >> Repair and Diagnosis >> Engine Performance >> System >> EGR System >> Testing >> EGR Valve >> Valve Opening Test

Valve Opening Test

Download the full database via torrent (~1.1 TB)
  1. With engine at normal operating temperature and at idle, rapidly open and close throttle. Open throttle sufficiently to obtain at least 1500 RPM. Movement should be noticed in EGR diaphragm.
  2. If diaphragm does not move, probable causes are: faulty vacuum signal to EGR, defective EGR diaphragm or defective backpressure sensor diaphragm (if equipped), or leaks in vacuum lines or connections.
scientia non olet · About Brad's Car Manuals