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Power Strokes
6.0 Tech
Voltage drop and idle speed drop during warm up
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[QUOTE="robrike1, post: 1550979, member: 33184"] Got my Bosch 140 amp alternator installed. Truck is doing great presently. No crazy surges similar to ac compressor kicking in and out. Those are gone. Voltage after startup and glow plugs off showing 13.5 at idle and 13.9 to 14.2 while driving. I've got the overdrive pulley on order. Had another issue with glow plugs not coming on last 2 starts with old alternator. I reseated gpcm plugs while swapping alternator and so far so good. I really think old alternator voltage regulator was failing. Don't know if that can cause trouble for PCM and mess with signal to glow plugs. I'll keep an eye on glow plug operation. GPCM is new so makes me wonder if problem was alternator even though it is off during GP operation or wiring issue somewhere. I ohm'd all plugs and had 0.7 ohms roughly on all of them so they check out good. Hopefully done with all the electrical issues. Time will tell. Robert Sent from my SM-N986U using Tapatalk [/QUOTE]
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Voltage drop and idle speed drop during warm up
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