hey guys i have a 00 S and when i bought it the car has a slight misfire at idle but runs strong as ever i got ahold of a friends scan tool and this is what i got p0301 cyl 1 misfire p0302 cyl 2 misfire, and p1399 random misfire. I changed the plugs thinking this may have been the prob but no. So i ordered 2 ignition coils one for cyl1 and one for cyl2 is this a common prob thats easily fixed and does anyone else have any suggestions. My buddy said it might be an vaccum leak but i havent detected one yet. When the car is cold and you start it it runs fine but when it idles down it pup pup pup a little. thanks for all of your help guys

 

check the valve clearance. if they're out of spec, they can cause a misfire as well.

try not to use those 2 new coils just yet. first try shuffling the coils you have on the car already around. switch the coils from the misfiring cyls to the non misfiring cylinders. if the misfire moves cylinders in correlation with the coil packs you moved, then it's your coils. if not, the the coils are fine and you can return the new (expensive) ones you bought.

 

This thread might help:

https://www.s2ki.com/forums/index.ph...&f=22&t=659930

 

ok guys thanks i switched the only good coil i have #3 and put in on #1 and it didnt throw the code for #1 misfire so im guessing it is just the coils btw the car has 130000 miles on it its about time to change them anyway

 

Hey guys check this i checked it this morn and now its throwing a code for missfire on all 4 cyls ?!? The other day when i checked it was only on 234 could this be the coils for sure? the car has 130,000 miles on it my DD and may this be the prob just from wear? i changed the plugs and still getting this code cel flashes 7 times slow and 1 then 7 slow 2fast then 7 slow 3fast 7 slow 4fast

 

hey guys ordered my coils today on the price lol. and i put some seafoam in the tank to clear out the injectors

 

Put the coils on and no change so i put the old ones back in same thing went and got my money back lol Im leaning toward the injectors im showing misfire on all 4 now

 

bad gas?

 

ive ran through numerous of 93 mabey like at least 6 tanks full and one with 93+ seafoam idk what to do i need help bad