Do you know with what scanner or tool could I configure the ECU? Also, do you know where I could get the code from an ECU M / T? it turns out that my mustang bought it without ECU (it was stolen) and apparently no one else in the forum sees my post Hahahahaha

 

In that regard, you're on the same page as me...

Seeing I am not local to the USA (Europe for me), and I drive the car daily, I'd rather not mess with the ECU programming at all (in the USA there is atleast a knowledgebase for that stuff, and I'm half a world away from that knowledgebase, so if something breaks I'm in for an issue), so I never really looked into that.

Usually reprogramming an ECU would be done by some shop that has the tools and the know-how to tinker with it. So you might want to search locally for some shop that does car-tunes, and inform with them if they might be able to check it out (considering you're in Santiago, I doubt they have much expirience with Mustangs), and for what cost.

Considering eBay for used modules, that might be a quicker and cheaper way to go:

https://www.ebay.com/itm/1999-Ford-M...BabVHc&vxp=mtr

https://www.ebay.com/itm/2001-FORD-M...tZY~dz&vxp=mtr

https://www.ebay.com/itm/02-03-Ford-...hZ-OIj&vxp=mtr

Just make sure beforehand it WILL fit your vehicle, and is the correct one. Stay away from the GT modules (since those govern the V8, and not the V6), and as far as I know the 99-04 models should have interchangable parts, so the 02-03 ECU mentioned above should _theoretically_ fit the 01 Mustang. But better ask five times, then buy once and get stuck with something you can't use.

And ofcourse, the ECU mismatch is something that _MAY_ explain why you have issues starting, but it is by no means said it's actually the cause of the issues.

You are ofcourse free to check the other forums I mentioned in this thread, and ask the question there too. More threads means more exposure, means more info. Just be sure to include as much information as you can when asking.

 

I just disassembled the FPDM and found some corroding in the connector, could it be part of the problem?

 

It does handle the fuelpump, so it might. But I’d expect it to act up all the time then, not just on starting

 

A couple of days ago the vehicle did not start again, it was progressively failing, it is a very strange failure,

To recapitulate, the failures could be:
-Reprogramming
-FPDM

Any other idea what could it be?

 

Starting / running problems can have a heap of causes... best way to tackle it is start with the stuff thats not standard and exclude those parts as a cause.

If the car runs fine, the fuel, spark and air all seem okay. Could be the ecu is doing something different on starting, and is doing the same once running. since you know the ecu is for an automatic, wheras the car is a manual transmission, it does seem the problem might be there. https://en.m.wikipedia.org/wiki/Engine_control_unit

I doubt the corrosion on the plug has a bearing om the issue, but it isnt a bad thing to get rid of. Who knows, it might fix the issue

Once you know the engine is getting the right signals, it could be any of the things that the wikipage talks about, tho most of those also have a noticable effect on running the engine, and not just starting it.

As stated, other forums might have more answers, and someone else migh chip in here. Based on logic atleast I cant really offer that much more insight on the issue.

 

there are many things to check. check the compression on all cylinders. could be a crank position censer. could be and issue with the mass air flow being dirty or bad. Is the check engine light on? Have you ran the codes if it is? could be a small leak in the fuel system causing the system to get vapor locked with air and not shooting gas into the cylinders. there are so many things that could be the issue. go to a junk yard/ salvage yard and see if you can buy all the censers off a junk car cheaply. switch one at a time until you find the one that fixes the issue. if you don't trust the junk yard part once it starts go out and buy that part new. also check the spark. you could also have a bad ground some place not letting the coil pack put out enough spark. Lots of things to check. You already checked the. get the code from your cars computer and go to a salvage yard and see if you can find the same one. see if that fixes the issue. I had a car once and here it ended up just being a bad relay in the fuse panel under the hood. some times it would make a connection and others times it wouldn't.

 

Considering he's in Santiago, that probably indicates he's in the same boat as me... Mustangs are rare!

Which means getting junkyard / salvageyard parts for the car is a virtual impossibility. I've seen a few junkers on the web locally to me, but those were either the wrong year Mustang, or had a different engine/transmission than mine. Which makes getting sensors and the like very unlikely.

 

If you want a parts car on copart they have a gt for 1,050 dollars. after fees you will have like 1488 dollars into it or so. https://www.copart.com/lot/27179698 then you have to have it shipped as well. it's to run and drive. it could also be a good project for someone starting out.