don't kno if its a problem but here it goes... everytime i turn on my engine i can here a puffpuff or a cough every 3-5 seconds... remind u engine is already warmed up... never heard this kinda of puff before.. maybe its something inside.. don't kno.. been happening for 2 weeks.. let me kno thanx

 

might need a tune up.

 

Change spark plugs and wires. Clean air filter.

 

^^Agreed. Treat yourself to a new cap a rotor as well.