P0674 Glow plugs
I know I posted about this about September 2018 but I can't find it.
Back then I replaced #4 glow plug but still kept getting SEL with new plug. After changing the glow plug twice I still got P0674. So I determined it was probably the GP Controller. Changed it still same problem. Not so bad when its warm enough they don't cycle so now SEL.
Now recently I started getting P0678. Today I decided to fix it once and for all. Did some research and figured I could figure things out. Pulled #4 get 0.6 ohms on it. Same on #8. Well lets try #2 its working and its the same.
Key off I have 0.9 volts going to all 3 leads when disconnected. Key on 2.4 volts. Start and when plugs cycle 11.4 volts then drops back to 2.4 volts.
Started it with #2 disconnected and got P0672, P0674, and P0678. Cleared again P0672 is gone but P0674 and P0678 keep coming back and setting SEL.
Tomorrow I plan on disconnecting both batteries and grounding positive leads for an hour. Did that after I replaced the GP Controller just hoping it will work this time.
Any other suggestions?
"The Constitution is not an instrument for the government to restrain the people, it is an instrument for the people to restrain the government."
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A5150nut
2006 K3500 D/A
94 6.5 4x4 5spd Sold