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Noid test fail, no pwer to injectors ???????????

2K views 2 replies 2 participants last post by  joefrontier2 
#1 · (Edited)
I had a misfire on # 4 , code P0304, noid test will not light up ANY of the injector wires. engine idles rough and at low RPM, seems to clear up when RPMs go above 2000 (at highway speed), Is this a bad ECM? I have read that there are fuses that control parts of the system. Why would only one cyl. misfire? Should'nt they all misfire? Please help.
 
#2 ·
Update, for whatever reason, the noid light showed a signal to the fuel injectors, but I still have a consistent misfire on #4. Tried switching the injectors from 3 to 4 no change, OHMED out the pigtail, switched plugs and wires. Still only misfire on 4,????????????
 
#3 ·
Did you check the distributor and or cap?


How many miles?
 
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