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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: 1549657, member: 33184"] I have the single alternator setup. After replacing the crumbled ground cable yesterday at work and cleaning the passenger negative post to engine ground thoroughly I woke up this morning and went out to start it and to my surprise there was still a slight hunt during idle but here is the surprising part, the surge or hunting stopped after a couple of minutes with my coolant temp at 84 degrees Fahrenheit. Usually that wouldn't show signs of stopping till 140 degrees at least. Voltage on my Edge CTS showed at between 12.9 and 13.2 from there on out till I arrived at home. I am going to test alternator voltage properly later today with a voltmeter and report back my results. I think I have made quite a bit of progress on this issue just by checking body to frame ground and cleaning passenger negative to engine ground thanks to info on this forum. I still have passenger negative post to frame to clean and then driver negative post to frame but so far I am pretty positive feeling about the results this AM. Thanks to everyone for all the valuable info on this site. I bought this truck used in 2014 (2004 F250 King Ranch) with 104,000 miles on it. Dealer had replaced blown head gaskets and oil cooler before my purchase and it has been pretty trouble free since. They also replaced alternator then because 2 days after purchase battery light was coming on. Aside from a rear end that was covered under extended warranty this has been my first real issue with odometer at 136,000 now. I'll update this once I get voltmeter readings and again when I get those other grounds cleaned up. Robert Sent from my SM-G955U using Tapatalk [/QUOTE]
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Voltage drop and idle speed drop during warm up
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