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Old 02-04-2008, 01:02 AM   #14
j cAT
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Re: '91 Lumina electrical ? Prob

Quote:
Originally Posted by Bearwulf
Will it run with the upper plenium off the engine? That is the only way to test individual inj.
All inj. show power to both hot & grnd. when connected even one @ a time. When all are unplugged the system shows power to one side & grnd. to other.
12volts is always on one side of injector always... the ecm/pcm is grounding the other side so as engine runs the ground side pulses from 12volts to 0 volts understand. now if you have a shorted injector this will mess up the other injectors so you must disconnect one at a time to determine this or buy a meter and check resistance......of each injector....
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