[genolan]

Have been driving a lot lately and the car has been running real well until tonight. I took it to the store and came out an hour later and she started right up got at about 2k rpm she bucked and a slight pop out the exhaust, I punched it and it hesitated then took off and ran strong. Started from a stop and the same thing and repeated it at least 10 times with the same results. There was no smoke or strange smell just hesitation, at ideal it runs fine.
Thanks in advance!!