starting problem.
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Senior User
Joined: Nov 2012
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starting problem.
got a 85 f150 with the 300 6 engine with 3spd
the other day i notice it would turn over slow then turn over fast like it should. did this twice, then the next day went to move it and it just makes the crazy clicking noise.
wired part is if you put a charger to it for about a 1min or 3 it will fire up. you take the charger off and turn it off it wont restart dose it again.
we installed a new started solenoid and it still dose it,
battery is at 12volts
the other day i notice it would turn over slow then turn over fast like it should. did this twice, then the next day went to move it and it just makes the crazy clicking noise.
wired part is if you put a charger to it for about a 1min or 3 it will fire up. you take the charger off and turn it off it wont restart dose it again.
we installed a new started solenoid and it still dose it,
battery is at 12volts
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 39
From: EXTREME southwest CT
A six cell lead/acid battery should be 12.6V at rest. (ideally)
How old is the battery, and how low does it go while trying to start?
The next time you have the truck running check the voltage while you hold the engine rpm's
What does it read when your alternator is charging?
How old is the battery, and how low does it go while trying to start?
The next time you have the truck running check the voltage while you hold the engine rpm's
What does it read when your alternator is charging?
Lead Driver
Joined: Nov 2013
Posts: 7,173
Likes: 1,173
Test the battery under load. A voltage reading at rest doesn't really mean much. A marginal battery can test fine at rest but fail under the load of the starter.
While you're at it, run a voltage drop test on the cables, including the ground side.
Details of how to run the battery load test and voltage drop test are here:
https://www.ford-trucks.com/forums/1...w-starter.html
Step-by-step instructions are near the bottom of that first post. It's only three simple meter hookups, taking less than five minutes. The tests will confirm if the battery is capable of supplying adequate current under load, and if the rest of the starter circuit is delivering that current without restriction.
While you're at it, run a voltage drop test on the cables, including the ground side.
Details of how to run the battery load test and voltage drop test are here:
https://www.ford-trucks.com/forums/1...w-starter.html
Step-by-step instructions are near the bottom of that first post. It's only three simple meter hookups, taking less than five minutes. The tests will confirm if the battery is capable of supplying adequate current under load, and if the rest of the starter circuit is delivering that current without restriction.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 39
From: EXTREME southwest CT
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