Mustang 2026, starter issue?

[Nylanderz]

Hello!
So I've owned this mustang for a couple of years.
This summer it started acting up on me, I think I had narrowed it down to a bad relay so I changed that and it started working again, well until it started again.
So I ordered a new starter for it (OEM), it worked for a couple of times then it started again.

Seems like an intermittent power fault? Hard to describe.
Any pointers where to continue searching is greatly appreciated, snow season is coming up.

Edit: should notice that if I keep pushing the starter long enough the automatic fuse in engine bay blows.

Here's a YouTube video showing it.

 

[Nylanderz]

Forgot to mention that flywheel visually looks OK!

 

[foton]

seems to me that when the engine is turning over you have a difference in compression between the cylinders, when it starts what does it run like?? is hard to start the only problem??

 

[Nylanderz]

seems to me that when the engine is turning over you have a difference in compression between the cylinders, when it starts what does it run like?? is hard to start the only problem??

Hmm. It's running really good, "only" a startup problem. Not loosing any oil and the oil itself looks perfectly fine, everything around the engine seems ok!

The engaging is very intermittent, and sometimes it engages just enough to get the engine running, and when I turn the key for too long the automatic "head fuse" in the engine compartment goes off.

With the fuse blowing it feels likely to be an electrical fault,one thing that comes to mind is if there's a way to bypass both the safety switch in the seat and armrest?
Is it safe to do by just running a wire from the ignition to the starter solenoid and still have the original and that runs through the relays?

 

[foton]

well if you are blowing out a fuse,that tells you that you are pulling to many amps on that start circuit,something is dragging. that is why when it is turning over it is not even.

 

[CountryXJer]

Have you checked all of the battery connections and grounds?

 

[Firefighter]

Hello!
So I've owned this mustang for a couple of years.
This summer it started acting up on me, I think I had narrowed it down to a bad relay so I changed that and it started working again, well until it started again.
So I ordered a new starter for it (OEM), it worked for a couple of times then it started again.

Seems like an intermittent power fault? Hard to describe.
Any pointers where to continue searching is greatly appreciated, snow season is coming up.

Edit: should notice that if I keep pushing the starter long enough the automatic fuse in engine bay blows.

Here's a YouTube video showing it.

Is the auxillary or any hydraulics engaged, also check for any hot battery cables, starter/ battery connections that would give an indication of poor connections , also bad battery can cause similar symptoms

 

[Nylanderz]

Cleaned ground connections today, new 1ga ground cables, charged battery, it has been sitting in my 16c heated shop for a couple of days, started up but I hear the starter skipping.

No auxiliary hydraulics or something like that engaged.

 

[Nylanderz]

well if you are blowing out a fuse,that tells you that you are pulling to many amps on that start circuit,something is dragging. that is why when it is turning over it is not even.

How would I easiest make sure that nothings dragging beside having all the levers and pedals in neutral?

 

[Firefighter]

if all pedals & levers are in neutral u should be ok, again be certain that the battery is good. load test it if possible
if everything checks out, I wonder if u have issues with the starter, if it was a genuine oem starter they wont give issues, I'm not sure what mustang sells now i'm thinking aftermarket, the Hitachi original used to cost round $1000

 

[Nylanderz]

if all pedals & levers are in neutral u should be ok, again be certain that the battery is good. load test it if possible
if everything checks out, I wonder if u have issues with the starter, if it was a genuine oem starter they wont give issues, I'm not sure what mustang sells now i'm thinking aftermarket, the Hitachi original used to cost round $1000

the one that was In the machine was a Hitachi S13-332.
Now that I think of it, it might be a replacement starter.
I'm located in Sweden where skidsteer are not as common, nearest mustang/gehl dealer is like 600km away.

I'll try load testing the battery, otherwise I might put back the old starter just to rule that out.

 

[Firefighter]

the one that was In the machine was a Hitachi S13-332.
Now that I think of it, it might be a replacement starter.
I'm located in Sweden where skidsteer are not as common, nearest mustang/gehl dealer is like 600km away.

I'll try load testing the battery, otherwise I might put back the old starter just to rule that out.

if at all possible if u have a good starter repair shop in the area, u are better off getting it repaired
u could also hook up jumper cables n see if that makes a difference

 

[ward]

It sounds to me like your just short of amps to crank the unit over, batteries can have the plates crack and break off and still give a good voltage but a load test will tell the truth.

 

[Nylanderz]

So, couple months later and this has now turned into a no-start issue.
I have been able to run it but it's now pretty clear that it's an electrical fault.
New battery, rebuilt starter, new battery and ground cables and it's barely turning over before the 35A main fuse blows in the engine compartment.

If I remove the wires to the solenoid and run a 12v from the ignition it turns over fine but won't start, I'm guessing the fuel stop solenoid runs via the relays.
I have also unplugged all relays and tried with a new on each but with no success.

Visually I can't find anything that smokes,becomes hot or any other obvious signs except the fuse blowing and the no turn.

Any pointers how I should go about this?
Checked and cleaned all grounding points, everything behind the instrument panel looks fine as well.

 

[Nylanderz]

Also, if there's anyone out there that got a service manual and/or wiring diagram or know where it's safe to buy a digital copy it would be much appreciated,

 

[Nylanderz]

A little update, when I disconnect the fuel shutoff solenoid on the pump it fires right up, plug it in, burns main fuse.
Has to be the fuel solenoid that's went bad, right?
If the problem would lie in the harness before the solenoid I'm guessing disconnecting it wouldn't help out. Correct me if I'm wrong .

 

[Firefighter]

A little update, when I disconnect the fuel shutoff solenoid on the pump it fires right up, plug it in, burns main fuse.
Has to be the fuel solenoid that's went bad, right?
If the problem would lie in the harness before the solenoid I'm guessing disconnecting it wouldn't help out. Correct me if I'm wrong .

yes it would appear to be bad

 

[bluettel]

Had the same problem with our 2054 recently. It was a dead short in the wiring harness that goes from the cab to the engine compartment. Had to take the cab off to spice the wiring.