After two days, today the car was finally returned to me by the mechanic. Indeed, the cost was higher than the budget I had, a total of $370, and now I have a debt of $170 with my father who helped me pay the excess.

The bill was as follows:

3 liters of oil and filter $30

timing belt and tensioner $50

original spark plug wire set $28

2 tripod rubbers $10

2 internal rubbers $10

1 liter of valvuoline $7

right steering column $13

injector cleaning $10

4 light bulbs $2

body computer repair (electrical problem) $80

general labor (tuning, timing belt, front end and inspection of the entire electrical system) $130

Total $370

I still have to change the car's horn (it's burned out) and have the 4 tires aligned

The good side of all this is that I have the car in optimal conditions for another year of work!