F-150 starter question

[rrman61]

How much voltage is required to properly engage the solenoid on a starter on a 2013 f-150 with the 5.0 engine?

 

[4play]

The spec is going to be 12V, but they will engage fine around 10v turning over enough to start. That's an unusual question, since the circuit only deals with battery voltage, but the relay/solenoid will engage probably down to 6-8v. If battery voltage is low, it might engage but not enough power to spin or spin fast enough.

 

[used red MN]

The spec is going to be 12V, but they will engage fine around 10v turning over enough to start. That's an unusual question, since the circuit only deals with battery voltage, but the relay/solenoid will engage probably down to 6-8v. If battery voltage is low, it might engage but not enough power to spin or spin fast enough.

Will the computer fire the ignition and injectors at 10 volts? My son has that exact model and engine. It is what I call a “set sequence start” vehicle, I am sure there is another proper name for it. The initial contact of the ignition switch start contacts initiates the sequence whether you continue to hold the switch in the start position or not. The computer follows the set sequence to start the engine. The engine either starts, or cranks the prescribed time of the sequence and stops if the engine does not start and I also suspect there is a minimum voltage level that will also stop the sequence. I am not sure around what year this was introduced but as many of you I am sure have noticed, many vehicles have this. All FOB vehicles with push button starts utilize this.

 

[rrman61]

The spec is going to be 12V, but they will engage fine around 10v turning over enough to start. That's an unusual question, since the circuit only deals with battery voltage, but the relay/solenoid will engage probably down to 6-8v. If battery voltage is low, it might engage but not enough power to spin or spin fast enough.

The truck has 101,000 miles on it now.last winter the starter was not engaging.took it off and brought it to a starter repair shop.the guy said it was an internal problem between the solenoid and the actual starter drive.it’s not a rebuildable starter so the whole thing was replaced.now six months and maybe 3000 mile later;same thing,ok brought it back for warranty and they replaced the solenoid.guess what:no change.it clicks 4 or 5 times then starts.10 volts at the solenoid when trying to start truck.can the starter relay cause this?

 

[olddavid]

Will the computer fire the ignition and injectors at 10 volts? My son has that exact model and engine. It is what I call a “set sequence start” vehicle, I am sure there is another proper name for it. The initial contact of the ignition switch start contacts initiates the sequence whether you continue to hold the switch in the start position or not. The computer follows the set sequence to start the engine. The engine either starts, or cranks the prescribed time of the sequence and stops if the engine does not start and I also suspect there is a minimum voltage level that will also stop the sequence. I am not sure around what year this was introduced but as many of you I am sure have noticed, many vehicles have this. All FOB vehicles with push button starts utilize this.

Yikes! Ain't modern electronic automotive technology wonderful?

 

[JDIH]

The truck has 101,000 miles on it now.last winter the starter was not engaging.took it off and brought it to a starter repair shop.the guy said it was an internal problem between the solenoid and the actual starter drive.it’s not a rebuildable starter so the whole thing was replaced.now six months and maybe 3000 mile later;same thing,ok brought it back for warranty and they replaced the solenoid.guess what:no change.it clicks 4 or 5 times then starts.10 volts at the solenoid when trying to start truck.can the starter relay cause this?

If it clicks a few times and then starts its not a battery voltage problem, though it could be a connection issue. Get out the old school test light with a helper and see if/where you're losing power or ground. If the starter is remaining grounded and the positive post on the starter (not the cable) is staying hot you've got a bad starter

 

[olddavid]

Battery ground to block connection?

 

[Pat80flh]

If I had to guess I'd say junk reman starter. In extreme cases, I've wired a bulb into the circuit, through the firewall, just to be sure the solenoid was getting the signal

 

[used red MN]

Since this is an old tractor forum, I suspect you could get better and more detailed answers here
Ford f150 for um
It will take a bit to load.

 

[Fixingfarmer]

The truck has 101,000 miles on it now.last winter the starter was not engaging.took it off and brought it to a starter repair shop.the guy said it was an internal problem between the solenoid and the actual starter drive.it’s not a rebuildable starter so the whole thing was replaced.now six months and maybe 3000 mile later;same thing,ok brought it back for warranty and they replaced the solenoid.guess what:no change.it clicks 4 or 5 times then starts.10 volts at the solenoid when trying to start truck.can the starter relay cause this?

Certainly see what it has for voltage at the relay if 12 try a new cable to the starter with new hardware attaching it. Ground cable as well is a good place to start

 

[Brown David]

Since this is an old tractor forum, I suspect you could get better and more detailed answers here
Ford f150 for um
It will take a bit to load.

Or here.

https://www.ford-trucks.com/forums/index.php

I've gotten a lot of information there when I ran a F150.

 

[DZG300]

You got a bad cable connection. Either ground or postitive. Most likely on the hot side.

 

[guido]

How much voltage is required to properly engage the solenoid on a starter on a 2013 f-150 with the 5.0 engine?

mman61.

A 12 volt starter requires a minimum of 9.6 volts to provide proper engine starting speed while cranking.
Some engines will start with less if all else is well.
The voltage of 9.6 volts is measured at the starter positive lug.

Start taking some voltage readings From the battery to the starter. If you have a voltage drop you will find that the starter is NOT getting the 9.6 volts it needs to properly engage and crank the engine.

Guido

 

[guido]

Will the computer fire the ignition and injectors at 10 volts? My son has that exact model and engine. It is what I call a “set sequence start” vehicle, I am sure there is another proper name for it. The initial contact of the ignition switch start contacts initiates the sequence whether you continue to hold the switch in the start position or not. The computer follows the set sequence to start the engine. The engine either starts, or cranks the prescribed time of the sequence and stops if the engine does not start and I also suspect there is a minimum voltage level that will also stop the sequence. I am not sure around what year this was introduced but as many of you I am sure have noticed, many vehicles have this. All FOB vehicles with push button starts utilize this.

used red MN,

Short answer? Yes!

Guido.

 

[Hobo,NC]

How much voltage is required to properly engage the solenoid on a starter on a 2013 f-150 with the 5.0 engine?

Normally on the S side of the solenoid with no starter engagement 1V drop on a fully charged battery. 10V is a sign something is amidst you are dropping 2.6V : ( are consuming to much voltage on the S terminal. I would have stated out load testing the battery and confirming the battery connection health. If you could dodat you would have already told us.

1. Before extensive testing, swap the starter relay with the blower motor relay in the underhood fuse box.

2. If the starter now operates properly and the blower motor is now working incorrectly, replace the defective starter relay that is now in the blower motor relay location.

Note: A failing starter solenoid can cause the starter relay to burn out prematurely. Monitor amperage draw on the Brown/Green wire to the S terminal of the starter while cranking .
Typical amperage draw should be under 15-20 amps while the starter solenoid is engaged, if amperage draw is found to be excessive, replace the defective starter before installing the replacement relay.