I keep getting a CEL every now and again ( been getting more frequent ) saying multiple cylndar misfire. Car runs fine, idles fine, no visual or hearable problems. Im thinking maybe a coil pack is going bad? spark plugs are changed every oil change. any ideas or help is appreciated

 

i got the same thing except mine says cylinder #3 and it makes a tapping noise. does your tap?

 

Make sure everything is gapped properly and make sure the plugs are turned tight enough at least 1/4 past hand tighten.

 

nope theres no tapping or any other kind of noises, and they are about 1/4 past hand tighten, i usually get them tight and just a little tug once and i call it good.

 

I can't tell because you don't list your mods, it could be a bad coil but if it's not causing any problems I wouldn't do anything personally, but you may want to.

You don't have those ebay boot springs do you?

 

all my mods are in my vb garage. and no i do not have the ebay boot springs

 

bump

 

i have the same problem. its not the coil packs, plugs, injectors. check where the bost line runs 2 the little black rectangular box directly 2 the right of the engine where 1 line runs in 1 side then another line runs out the back. if u have a buddy try swapping out map sensors also that may be ur problem

 

alright ill look into this the next time I can, thanks

 

no problem let me know what happens man

 

alright thanks. is the sensor easy to change? I might just buy a new one if theyre cheap enough

 

there 70 and i havent chasnged mine yet

 

really easy to change. its just a clip, unclip it and switch it. its a little grey button on top push it and it opens up and you can slip it off.

 

some of the things gm does im like ah sweet thats easy to change, like the rear suspension on cobalts, other things you wonder what the hell they were thinking ya know