Hi everybody,

yesterday, I take my car for the Vehicle Inspection Division in my country and it fail because it smoke when I push pedal full throttle.So, I check the car by myself and I see that when I push pedal and remove my foot no smoke then few amount of black smoke come for 5 seconds then directly it gone.

Anybody know what is the problem?

 

Black smoke means it's running rich. When was the last time you had a tune up done?

Any check engine lights or codes present?

 

(last time you had a tune up done)>>>>you mean change spark plug and rotor ...etc?

If yes its in 11 November 2017 (I replace spark plugs,fuel filter, distributor rotor and cap, wire plug and pcv valve)
also before 6 months I replace spider injectors with new gm and new cam shaft sensor.

''NO engine light''

 

 

This was something we had to do for my old carbureted 68 Mustang when it was subject to emission tests. To keep the plugs from being fouled while waiting in line, I'd have to rev it ever minute or so and immediately before going into the testing area.