9thgenidiot

Are these ignition coils cooked? Sorry if the pics are huge (pics at the bottom).

I've been having problems recently on my 2012 Civic (150,000 miles):

Weak acceleration, lack of power when accelerating, car shaking when idle / stopped, slightly louder engine noise.. sometimes when starting the ignition it sounds like it's not gonna start but does.. but 90% of the time it starts right up.. never had a "no start" condition.

Never had a check engine light and no codes are stored at all.

I found a tear in my air intake boot directly after the MAF and replaced it thinking this could be causing some problems. The problems seemed to get better for a day but they're back now.

I replaced all four spark plugs with brand new ones, no luck. But when doing this I noticed all four ignition coils had this identical appearance.. brown soot all over them. Obviously it doesn't look good but is it really cause for concern?

I did a spark test using a spark tester (AutoCraft Ignition Tester) and all four coils had the same result-- there was a spark although it looked weak. Very very thin, thinner than a strand of hair, and white. The spark wasn't consistent though, sometimes it would seem like 4-5 sparks per second, then 3-4, then back to 4-5.

Any ideas? Is it worth replacing coils or should I check elsewhere first?

I heard it could be my battery (need to replace it soon anyway) not sending enough voltage to the alternator, which could be creating a weak spark? Thus why there is no CEL, because it's a spark but very weak..?

P.S. it looks like oil all around the dipstick but it's just dirt, pics are deceiving.

Thanks!

b16racereg6

iTrader: (2)

That's a lot of miles for a 3yr car. Try replacing them it can't hurt it.

9thgenidiot

Thanks just ordered four new ones from Majestic Honda site. I'm thinking those little white specks are burn marks indicating a failing coil but not 100% sure. Either way it's time to replace.

Thanks

97emsedan

And change that battery before it gives you grief...

b16racereg6

iTrader: (2)

I don't think the battery is bad unless he was in extreme cold or heat. The average battery last 5 years. Again that's a lot of miles. I think a tune up should help him. Make sure you filters are changed also.

Pretty impressed you did that many miles in that short amount of time. My car is a 06 and I just hit 161k today.