Still having a squeak

So I asked about my ford explorer the other day and it has a squeaking problem when I accelerate. I replaced the alternator, pully, tensioner, and ball joint but I'm still having the same issue. I was hoping when I replaced the tensioner the problem would be gone but it's still accurring. When the sound happens it doesn't get louder or quieter it stays the same pitch no matter my speed. Any ideas on what it could be?

My car has 85500 miles.
My car has an automatic transmission.

– Still having a squeak

My truck vibrates in the frount end when i slow down are brake around 30 to 20 mph ive changed the whole set up as far as brakes

I have change rotors pads lines brakets pins checked tires and tirod ends every things good had it checked by 3 different shops and no one couldn't find the problem domt know what eles to doi dom every thing and changed all brake part also this started before i made repairs it even doed it when i decelerate with out pressing brake

My car has 139108 miles.
My car has an automatic transmission.

– My truck vibrates in the frount end when i slow down are brake around 30 to 20 mph ive changed the whole set up as far as brakes

Car doesnt move

Car starts but when i shift gears car doesnt move makes a aannttttt noise. I had the cataylic converter replaced still the same. Checked transmission fluid level and show its good. Dont know whats to do next

My car has 180000 miles.
My car has an automatic transmission.

– Car doesnt move

Car will not crank

Ok so my truck started up perfectly, I drove to the store and it will not crank now. When you try to start it, it makes like a grinding noise. It has a brand new battery and perfect connection and the lights don't even dim when I try to crank
My car has an automatic transmission.

– Car will not crank

I want to know that how can we give inputs to ECU

we ,students are going to design a car,we have an event .So could u please tell me ,what are the inputs we should give to ECU and also how should we give , I mean on what base we should mention the specific value . our engine is KTM 390 cc ,so how can we give inputs to the ECu,as we decided to design ECu own.
ON what base we should decide the inputss ..pls give reply

– I want to know that how can we give inputs to ECU