after i swapped mpfi, when my car is in neutral and i hit the throttle quickly, the car will bog a little before it revs. like the rpms will drop some and then go up. when im driving though it seems fine, no sputtering or anything.also it tends to do it worse when i havent driven it for a day and then it takes a couple seconds to start and is really boggy when i hit the gas. thanks

when im driving and i give it light throttle it also whistles real loud, im thinking maybe a crack or something in the manifold, cuz ive checked my vac lines.

 

That seems to happen a lot with MPFI swaps. It happened to my buddies ef hatch. Check your wiring and as for the whistling could be manifold or throttle body.

 

i checked all the wiring lots of times, i dunno i guess its just old car parts old car results