not sure where to start

[ThatShoGuy]

well i don't know to start but ill just lay it all out...

starts out in the morning.notice more when its colder
first start of the day it runs like crap sputtering.
when i tried to leave for work. the car would just fall on its face. never stalled...
just bogging.

so as im sitting to the side of my street hitting the throttle the car just bogs and dont move. finally after this happening for about a min the car revs and runs better. now it only got this bad one time.

normally when you go to leave you hold the throttle in one spot and the car will just rev up and down from the right rpm to like 500rpm about 10 times and it don't happen till the next day.

very strange im wondering if the fuel pump is on its way? my fuel rail valve was leaking a long time ago so i switched it out with a bolt. this was when i was at my younger age(owning the car for 7years) and just jammed w/e fit.

by the way the only engine light i get is the secondly air injection system (i think its p0420)and that hardly ever pops the light on.
since this is my only car i would really like this figured out so i don't get stranded..

thanks!

 

[ThatShoGuy]

also forgot to add that 3/4s of the time when you first take off from a stop the car sputters then after 1500 rpms the car takes off like a rocket..

 

[ThatShoGuy]

any suggestions??

thanks!

 

[Vnuk1]

Mass air flow sensor, unplug it then drive it. Sounds like the exact problem I had when mine started taking a dump..

 

[ThatShoGuy]

Mass air flow sensor, unplug it then drive it. Sounds like the exact problem I had when mine started taking a dump..

Good call I just assumed to rule it out since it only has 30k(edited) miles on it.. Tho it is a good 5 years old