I went to my car one morning and it was misfiring pretty bad. So I searched the forums and deiced to change my spark plugs...did change anything. So I got a diagnostic test and it came up with this:

P16684: Random Misfire Detected
P16685: Cylinder 1 Misfired Detected
P16686: Cylinder 2 Misfired Detected
P16688: Cylinder 4 Misfired Detected

I read up some more... should I just change all of the coilpacks and if so where would be the best place to buy them?

Thanks

 

check your maf too when did you change your timming belt?

 

coil packs-try taking one known good coil and swaping it out with the ones in you car one at a time. this will tell you which ones are bad.

 

it would be a huge coincidence that 3/4 of your packs died at once. assuming your car is a 2001 from your name, then it doesnt have an ICM. i would look at the plugs or MAF before you go just replacing parts. do you have any other info other then the car was just running bad?

 

It also got the code

P16486: Mass or volume air flow circuit low input

 

a P code is Pxxxx, 4 digits. the P code for that description is P0102. im not doubting that you didnt get a code for your MAF sensor, but please clear up what codes you have. post the complete list and let us determine which are related. from the description it sounds like it could be related to the MAF, but we need to know which codes you found in there.