Reasons for the difficulty in starting Volkswagen Bora cold car

1, starting system failure, such as insufficient battery power, damaged starter or starter circuit failure; 2, engine mechanical system failure, such as air leakage in the intake pipe, the piston and cylinder are not tightly sealed, the valve is not tightly closed, and there are too many carbon deposits in the intake valve and intake pipe, resulting in the injected gasoline being adsorbed by carbon deposits and unable to enter the combustion chamber; 3. Engine management system failure, such as weak speed sensor signal, incorrect water temperature signal, poor line contact, etc. ; 4. There are faults in the ignition system, such as excessive carbon deposition on the spark plug or incorrect gap, leakage of high-voltage lines, damage to the ignition coil, etc.

1, starting system failure, such as insufficient battery power, damaged starter or starter circuit failure;

2, engine mechanical system failure, such as air leakage in the intake pipe, the piston and cylinder are not tightly sealed, the valve is not tightly closed, and there are too many carbon deposits in the intake valve and intake pipe, resulting in the injected gasoline being adsorbed by carbon deposits and unable to enter the combustion chamber;

3. Engine management system failure, such as weak speed sensor signal, incorrect water temperature signal, poor line contact, etc. ;

4. There are faults in the ignition system, such as excessive carbon deposition on the spark plug or incorrect gap, leakage of high-voltage lines, damage to the ignition coil, etc.

5, oil supply system failure, such as insufficient pressure, nozzle leakage or blockage, etc.