T1 T0 pulse counting

#include <TimerOne.h>
#include <Streaming.h>
volatile unsigned long injector = 0;
volatile unsigned long injector_counter = 0;
volatile unsigned long pulse_time_counter = 0;
volatile unsigned long speed_sensor = 0;
volatile unsigned long measurement_time = 0;
volatile unsigned long speed_sensor_counter = 0;
int printTime = 1;  
unsigned long ltime, time;    //time variables
unsigned long lastTime; 
int check = 0;

void setup() 
{ 
  Serial.begin(115200);
  pinMode(13, OUTPUT);     
  Timer1.initialize(1000000); // set a timer of length 100000 microseconds (or 0.1 sec - or 10Hz => the led will blink 5 times, 5 cycles of on-and-off, per second)
  Timer1.attachInterrupt( timerIsr ); // attach the service routine here 
}
 
void loop()
{ 
  if (check == 1) {
  Serial << injector_counter << endl;
  pulse_time_counter = injector_counter = speed_sensor_counter = measurement_time = 0;
  }
  check = 0;  
  injector = pulseIn(2, HIGH);
 // speed_sensor = pulseIn(3, HIGH);
    if (injector != 0)
        {
        pulse_time_counter = pulse_time_counter + injector;
        injector_counter++; 
        }
    if (speed_sensor != 0)
        {
        speed_sensor_counter++;
        }
}
 
void timerIsr()
{
    check = 1;
    digitalWrite( 13, digitalRead( 13 ) ^ 1 );
}

As it looks now?

Is there a way to measure whether the Loop function equal to abide with me one second?