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Old September 13th, 2011, 08:13 PM   #1
219xj
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Default f350 starting slow....again

alright guys.. is some of you know i was having problems with my starter before cranking slow.. well i changed the starter and it cranked as it should.. nice and fast. well last week i left one of my interior lights on and drained my batteries as it had been sitting for 2 days.. ive been driving the truck for over 500 miles since i drained the batteries and even hooked it up to a trickle charger one night... well that helped but didnt seem to do much.. does anyone have an idea on what my problem could be? the starter isnt even 4weeks old.. i guess another thing is that the oil pan leaks oil right above it and gets a small amount of oil on it... i dont think thats a huge deal just letting you know all the information. so if you got an idea let me know guys, thanks in advance
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Old September 13th, 2011, 09:14 PM   #2
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Are your connections tight and clean? if so .run an external ground from one of your batteries to a good unpainted ground on your engine and see what happens.
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Old September 13th, 2011, 10:23 PM   #3
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you probably drained the batteries to the point of permanent damage and they now wont charge completely, meaning they will have the voltage, but current will be low. Measure the voltage while cranking, and see if it drops below 10 volts. If so, the batteries are no longer strong enough for the load.
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Old September 13th, 2011, 10:41 PM   #4
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get your batteries load tested, have them tested linked and then unhook them and test them separated....and were did you get your starter? 7.3 like to eat starters so if you got a cheap one that might be your problem again
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Old September 13th, 2011, 11:34 PM   #5
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Quote:
Originally Posted by Yota Bill View Post
you probably drained the batteries to the point of permanent damage and they now wont charge completely, meaning they will have the voltage, but current will be low. Measure the voltage while cranking, and see if it drops below 10 volts. If so, the batteries are no longer strong enough for the load.
this.

batteries that aren't in TOP shape in HEUI engines hate life.

glowpulgs eat a shit ton of power, then the starter circuit eats the rest trying to build oil pressure to start the beotch.

good batteries, no corrosion, good starter are the ONLY keys to making these engine start.

and compression and fuel.
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Old September 14th, 2011, 09:22 AM   #6
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as mentioned, your cranking over 7.3 liters of engine, with a high compression ratio, if your batteries are not in tip top shape, and your starter is not in tip top shape it's gonna be noticeable.
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Old September 14th, 2011, 08:06 PM   #7
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just tested one of my batteries at the zone.. one was bad. it solved all my problem. thanks for all the great help guys !
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