2015 6.7 slow to start, what do I need to watch?
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Post Fiend
Joined: Jan 2009
Posts: 6,521
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From: Greenwood, SC
2015 6.7 slow to start, what do I need to watch?
So, my truck has 140,000 on it and I'd estimate that for the last 20,000 miles I've noticed that she doesn't fire up at start up as quickly as it used to. When I flip the key the starter spins the engine maybe 1 second longer than I've been used to. I know it's only 1 maybe 2 seconds, but it feels like an eternity when it happens since these engines tend to fire up almost immediately.
I'm seeking opinions on what may be aging, wearing out, or maybe failing? I feel like I should be preparing for the day she just spins the starter and nothing happens.
Lately I have been letting the fuel pump run and hearing the fuel run up into the filter on top of the engine. The best theory I have right now is that it's slow to purge air or it's slow to prime the fuel system after an overnight of sitting. The current fuel filters have 8,000 miles on them.
I'm seeking opinions on what may be aging, wearing out, or maybe failing? I feel like I should be preparing for the day she just spins the starter and nothing happens.
Lately I have been letting the fuel pump run and hearing the fuel run up into the filter on top of the engine. The best theory I have right now is that it's slow to purge air or it's slow to prime the fuel system after an overnight of sitting. The current fuel filters have 8,000 miles on them.
Tuned
Joined: Dec 2010
Posts: 460
Likes: 51
From: Washington state
Have you eliminated weak batteries (possible bad cell) and done test on starter draw to eliminate bad starter. When I had a bad cell in my battery it did the same thing. Your battery is not that old but they still can fail when nearly new. I just had to replace the battery on my wife's 2014 Explorer. Other than that ?
Senior User
Joined: Feb 2014
Posts: 130
Likes: 0
When my 2011 6.7 batteries were about 2 years old the truck got a little slow to start. I topped off each cell (which had varying amounts of water in them) with distilled water, and she started firing up quicker from that moment on. Maybe a little battery maintenance is all you need. At that time I also cleaned the contacts, applied some anti-corrosion, and sanded down and primed/repainted my battery hold downs.
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johnnyggreen
1994.5 - 1997 7.3L Power Stroke Diesel
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Jan 3, 2013 06:52 PM
