I have an 07 s/c and cannot for the life of me get rid of this problem. It has been constant bucking and idle probs until I replaced plugs (iridiums) and cleaned throttle body (worst ive ever seen). ever since then its only bucked and idled rough on start ups until it warms up.. previous owner replaced maf and map.. mods are magnaflow catback and offbrand cai.. also megan springs but that has nothing to do with that.

Thanks in advance!

 

I had issues with my idle and bucking and jerking. They were all linked to any time it rained, water would be sucked up into my Injen and destroyed multiple MAF sensors. Check seals after the MAF for unmetered air also.

 

Thanks man I'll def check the maf previous owner did take the car muddling ?!?! Idk why lol