DIESEL ROUGH IDLE GLOW PLUG RESISTANCE PROCEDURE. Pontiac 6000 1982

For 1990-2009 cars

# DIESEL ROUGH IDLE GLOW PLUG RESISTANCE PROCEDURE

A NOZZLE WITH A TIP LEAK CAN ALLOW MORE FUEL THAN NORMAL INTO THE CYLINDER WHICH WILL RAISE THE GLOW PLUG OHM READING. THIS WILL ROB FUEL FROM THE NEXT NOZZLE IN THE FIRING SEQUENCE AND WILL RESULT IN THAT GLOW PLUG HAVING A LOW OHM READING. IF THIS IS ENCOUNTERED IT IS ADVISEABLE TO REMOVE, AND CHECK THE NOZZLE WITH A HIGH READING, IF IT IS LEAKING IT COULD BE CAUSING THE ROUGH IDLE. SOME GLOW PLUGS HAVE BEEN FOUND WHICH DO NOT INCREASE IN RESISTANCE WITH HEAT. IF YOU EXPERIENCE LOW READINGS ON A GLOW PLUG AND IT DOES NOT CHANGE WITH NOZZLE CHANGE, THEN SWITCH GLOW PLUGS BETWEEN A GOOD AND BAD CYLINDER. IF THE READING OF EACH CYLINDER IS NOT THE SAME AS BEFORE THE SWITCH, THEN THE GLOW PLUG CAN NOT BE USED FOR ROUGH IDLE DIAGNOSIS ALTHOUGH IT WILL FUNCTION FOR STARTING THE CAR.

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