Nope! Being familiar with this ECM, there is no delay in throttle. Unless the OP has other problems, there is only a programmed delay for entering PE (Power Enrichment) that makes these cars feel "sluggish".

To the OP.... Forget about intake and exhaust on a basically stock car. If you want better response, put you money on a good tune.

 

Yeah, that's why I'm saying there must be something up with yours. It shouldn't be "sluggish"..... again, not a V8 but this little 4 banger surprised me when I drove it.