Having a little difficulty since I installed the 4lb pulley. If I floor it at around 60mph it tends to "buck" (not backfire - but it simply is not smooth delivery). I am using the superchip program for the 4lb pulley BTW. Wondering what the problem is - any suggestions?

 

Sound like its in the tune.. Have it reburned. Also change you fuel filter to make sure your not starving you L for fuel. It could alos be a converter issue if its locking and unlocking rapidly?

Just some ideas!!

 

Probably you should contact your tuner and hear their suggestions.

 

maybe you fried your plugs