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Impulse, Stylus & 1988 Trooper II: Notes

  1. Check vacuum lines for correct routing. Disconnect vacuum hose at EGR valve, and plug hose end. Connect vacuum pump to EGR valve. Start engine. Apply 6-10 in. Hg to valve and hold.
  2. Engine speed should drop at least 100 RPM or engine should stall. Vacuum should not drop more than one in. Hg in 30 seconds. Reconnect EGR vacuum hose. With engine warm, increase engine speed. Ensure EGR valve stem moves up.
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