First post and first project advice

Projects General Guidance
3

refactored your code

#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2); 
int sensorPin = A0; 
int sensorValue = 0; 

void setup () 
{
  lcd.begin (20,4);
  lcd.print ("Manifold Pressure");

}

void loop()
{
  sensorValue = analogRead (sensorPin);
  float outputValue =  5.0 * sensorValue/ 1023.0;
  lcd.setCursor (0,1);
  lcd.print (outputValue, 2);
  delay (100);
}