Guess a less expensive way to go would be to buy two coils (preferably online from an Acura dealer). Replace the malfunctioning one, and have a spare readably available for the next failure. When it fails, buy another "spare"... That allows you to get the most out of the original coils without being "down" for more than your commute home (unless you keep your scan tool, tools & spares in the trunk).Same thing here.
Driving home from work last week, suddenly car started shaking, bad!
Got it home and pulled this code:
Searched "Acura TSX cylinder misfire" and this thread pops up. :tu:
Pulled the old spark plugs out:
Installed brand new NGK 6994:
Although I was in need of new spark plugs that didn't solve my problem.
In fact, more codes popped up! Along with my initial code of P0302... now I had P0301 and P0303 to deal with.
Went over my work and everything checked out so I knew that the culprit was most likely a bad coil plug.
Most likely coil plug #2 since that's the cylinder that was initially misfiring.
However, why did the other codes pop up after I changed the spark plugs?
Could it be that now the other coil plugs were going bad as well?
I could've started switching coil plugs around to see which one exactly was causing the problem, but I thought to myself that if one coil plug is already bad, then how long before they all go bad?
I wasn't gonna drive around and stall in the middle of nowhere to find out so I ordered 4 brand new Acura coil plugs online.
Parts arrived yesterday.
Out with the old:
Installed 4 new coil plugs and PROBLEM SOLVED!!
Coil plug part #:
All codes are cleared and car is running like a champ again.
Thanks again to this thread which originated in 2011 and to this DIY:
Sure glad I got this mess all sorted out because I just received my DMV renewal the other day and my vehicle is due for a smog. hsnap:
Hi guys,Awesome diagnosis, wolverinept! Glad it worked for you, and, that it wasn't too $$.
Just a point of useless clarification: Cylinders firing order I believe is actually 1, 3, 4, 2.
This is a short description of my experience with a problem I had a few weeks back. Excuse any mistakes as I'm multitasking.
I was driving nearby my home when my engine started vibrating oddly. I thought it was the A/C, so I shut that off. Over the period of 30-40 seconds it got progressively worst. I was only about a mile from home, so I decided I would try to make it back so I could park instead of having to get a tow.
As soon as I got to the next stoplight (and then tried to accelerate), my engine was barely managing to chug itself along.
CEL turns on.
I got her home, turn the car off and started her back up. Still the same problems.
My friend came over with a scanner and we got "Cylinder #4 Misfire". Oh ****, I didn't want to deal with this. The car was warm, so we opted to wait a few hours (~4 or so) until pulling the spark plugs to see their condition. The previous owner claimed he changed them 15k ago, but I didn't really believe him without a receipt.
Before pulling the plugs though, I switched two of the ignition coils. I didn't know the orientation of the cylinders, unfortunately... so I guess that they were (4,3,2,1) [passenger side - driver's side]. It is actually the opposite. I was hoping to switch the coil on #3 and #4 to see if the problem would follow a bad coil. It didn't because I swapped coils #1 and #2 without knowing it. At this point I should have swapped the other two coils, but I didn't.
I went to get new spark plugs and changed them. This was more of a piece of mind thing. I had a receipt, and I made sure to put anti-seize on them. Now I KNOW my plugs are new. The old ones didn't look good...
Problem still persisted. This time, I decided to switch the correct #3 and #4 ignition coils (the correct order is 1,2,3,4 from passenger to driver). The problem followed the coil. My friend's scanner read Cylinder #3 misfire.
I ordered a new ignition coil off amazon, installed it, and all is well again. So glad that it was not a more severe problem. Hope this guide may help someone who has a similar problem.
P.S. In my past experience, a bad spark plug or coil may be more intermittent. Mine just flat out went dead. The vibration may have been caused the imbalanced from only having 3 cylinders operational.