Starting issue
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New User
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Starting issue
Hello everybody! My first time on this site, hope I am doing this correctly.
I have a '99 F-250 super duty with a 5.4 L engine and I am having trouble starting it. Initially it wouldn't turn over at all, so I had the battery checked, it was fine, and after charging it the engine would turn over very, very slowly once or twice then stop. I then replaced the starter and now it turns over very erratically but wont start. Any ideas?
I have a '99 F-250 super duty with a 5.4 L engine and I am having trouble starting it. Initially it wouldn't turn over at all, so I had the battery checked, it was fine, and after charging it the engine would turn over very, very slowly once or twice then stop. I then replaced the starter and now it turns over very erratically but wont start. Any ideas?
Postmaster
Joined: Jul 2015
Posts: 4,392
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From: very South Texas
was the battery TESTED using the 100 amp "LOAD" test.. all others are a joke.
bad connection of a battery cable. both positive and negative cables ... both ends.
bad battery cable.. is any part of a cable swelling? that is BAD.
and a New/rebuilt starter could be bad right out of the box.
engine must spin at a proper speed before it will start.. so...
battery, cables, starter.
bad connection of a battery cable. both positive and negative cables ... both ends.
bad battery cable.. is any part of a cable swelling? that is BAD.
and a New/rebuilt starter could be bad right out of the box.
engine must spin at a proper speed before it will start.. so...
battery, cables, starter.
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New User
Joined: Aug 2016
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Thank you responding to my question!
I had it tested at Napa, and this Napa is pretty good, as opposed to some I've been to, surprisingly. I didn't notice any swelling, and cables looked good, a little dirty.. Could it just be bad connections, as in using a wire brush to clean off contact points for the cables?
I had it tested at Napa, and this Napa is pretty good, as opposed to some I've been to, surprisingly. I didn't notice any swelling, and cables looked good, a little dirty.. Could it just be bad connections, as in using a wire brush to clean off contact points for the cables?
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
A voltage drop test is easy to perform. While the circuit is under load during cranking.
Check both sides of the starting circuit one at a time. One probe of the voltmeter to the Negative battery post, the other to a clean unpainted part of the starter. Since electricity always follows the easiest path any voltage drop will show as a positive voltage. The limit is about 0.2 tenths of a volt. Same test with the positive side, lug on the starter to Positive battery post. The limit is a little higher maybe 0.3 tenths or so. Just from seeing the problems caused by bad cables over the years here it looks like once cables hit the 20 year mark or so they are done, definitely anything over 30.
Bum starters will draw WAY more current than a serviceable unit. This really smacks the battery hard. This can make the engine slow to start because the ignition is starved right when it needs it most, the starter is hogging all the juice.
Check both sides of the starting circuit one at a time. One probe of the voltmeter to the Negative battery post, the other to a clean unpainted part of the starter. Since electricity always follows the easiest path any voltage drop will show as a positive voltage. The limit is about 0.2 tenths of a volt. Same test with the positive side, lug on the starter to Positive battery post. The limit is a little higher maybe 0.3 tenths or so. Just from seeing the problems caused by bad cables over the years here it looks like once cables hit the 20 year mark or so they are done, definitely anything over 30.
Bum starters will draw WAY more current than a serviceable unit. This really smacks the battery hard. This can make the engine slow to start because the ignition is starved right when it needs it most, the starter is hogging all the juice.
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