Hard starting issues
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Joined: Mar 2016
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Hard starting issues
Hey guys. My 1997 7.3 with 165000 miles has progressively gotten harder to start. At 100 degrees it will crank for a long time till it fires. Placed a gauge to measure fuel pressure and I'm getting around 25 to 35 psi at idle. At WOT it is till around the same. Truck still bulls like a bull and runs good but starts like a freight train. Any help is appreciated. Fuel pump is around 3 years old and doesn't lean into the valley. Thanks.
Cargo Master
Joined: Jul 2015
Posts: 3,076
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From: Aransas Pass, Tx
When is the last time the glow plugs were changed? How fast is the engine turning while you're trying to start it? Batteries fresh?
Also, when was the last oil change and what does your fuel filter look like? That fuel pressure while running seems a bit low.
Also, when was the last oil change and what does your fuel filter look like? That fuel pressure while running seems a bit low.
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My batteries are only a few months old trucks pins the same speed that it always does it's only the last month or so that it's gotten really hard to start new oil thousand miles ago new fuel filter yesterday. glow plugs as far as I know our original but with very low fuel pressure I think it's something else, I got new plugs just haven't changed them.
Lead Driver
Joined: Sep 2002
Posts: 9,476
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From: North Texas
At 100F you should crank right up without a glow. I do. In fact, I unplug my GP relay in the summer. Hell, mine even started on one battery without a glow when I was screwing around with it.
What CCA are your batts? These trucks spec two 850s. Ever replaced the starter? The late Super Duty unit is easiest upgrade b
My money is on dirty cables or connections and/or a weak starter. Knottyrope has an excellent thread on targeting battery corrosion, both seen and unseen.
30psi cranking is within spec I recall
What CCA are your batts? These trucks spec two 850s. Ever replaced the starter? The late Super Duty unit is easiest upgrade b
My money is on dirty cables or connections and/or a weak starter. Knottyrope has an excellent thread on targeting battery corrosion, both seen and unseen.
30psi cranking is within spec I recall
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