I need help trying to figure out why I can't go past 70-75mph... the car shakes crazily. I checked the car and got some random misfire codes, i replaced the spark plugs, did the whole car tune-up, and i just got my tranny replaced for ~3k about a week ago. yet still, i have problems with this car still!!!

so i looked around on the forums and found this topic
https://acurazine.com/forums/2g-cl-problems-fixes-70/cel-misfire-cylinder-2-5-6-a-740010/
does anyone think i have the same problem? if so i could change the coil packs myself and save some moolah!

thanks!

 

Most likely a bad coilpack. Buy only ONE coilpack and replace the cylinders that are showing misfires. Reset the CEL in between each replacing. It should be one of the 3 cylinders with misfire codes. If not, try the rest.

 

thanks, by the way would you know how to reset the check engine llight in an 03 acura tl? or anyone?

 

Pull the clock backup fuse on the passenger side dash fuse panel for a min.

 

alright i'm back again, and apparently changing the coils didn't fix my problem. i changed 3 coils -cyl 1,3,5 and i was able to know that cause i borrowed one of those cel scanners. i also went to the dealer and got the computer reprogrammed for a incorrect gear ratio code as well. i tried changing #5 to #2 to see if any change would happen to no avail.
on the RPM dash, i am red lining, when i red line, my car does that violent shake and it feels like im riding a horse or something.
what else can i do? should i change all the coils or would that be a waste of money...?
thanks

 

btw, i get a check engine light only when i red line at ~65-75mph but as soon as i slow down it will go away, or sometimes it will stay until i turn off the car.

 

Are you serious? The car is supposed to do that. It's the fuel cutoff to prevent you from blowing your engine.

You might want to read up on what redline is.

http://en.wikipedia.org/wiki/Redline

 

i see that it mentions that the ecu will prevent the car from red lining, i guess will go see the dealer again sometime soon

 

well, today i got back from work and looked at the car again. used that check engine light reader and i got misfire in cylinders 1,2,5, random misfire. before, i got misfires in cylinders 1,3,5. i know i changed the coils for 1, and 5 already.
still pretty confused on why it's reading this... any thoughts?

 

^ Why didn't you didn't do the one by one method?

 

I had that happen to my sister inlaws honda crv, replaced the coilpacks but that wasnt it, still got random misfire codes, it turned out to be something with the piston which was causing it to misfire...

 

I sure sounds like a coil pack..
Look inside the coil pack , there is a spring make sure it is not burnt.
When my coil pack went bad the spring inside the coil was black and burnt.
The 1 bad coil caused 3 cylinders to misfire and a random misfire, car shook like it was gonna fall apart and could not go over 50MPH..
The cylinders are:
123
456
and they fire 1-4-2-5-3-6 in that order for the CL and CL type-s (I belive TL is the same)

Check the old coils and look if the spring is blackened and looks burnt, if not replace 2 others w/those 2 and look at the springs in the 2 u replace.. It does sound like a coil pack just finding which one is gonna be the issue..
Also where your plugs tigtened to spec?

 

Misfire related to a piston- how so? Please elaborate.

 

Hey im finally back again after going through **** with this car... so far ive still been having misfire problems, i brought it to the dealer and they said i had the wrong spark plugs-- which they were right.. however i got the car back and it started misfiring again, cylinders 1 and 5. so i brought it back to them and they said it could be carbon build up on the valves or it could be because the cylinders i replaced my car with were aftermarket. very skeptical right now because i dont feel like paying so much money. i paid $340.47 to replace my spark plugs which was very disappointing

anyways my real question is, should i pay $120 to have them clean out the carbon from my valve? (if it is even causing the problem?)
i havent gotten a chance to mess around with the coils again, but im guessing i should try swapping coils around and seeing if it works.

on top of all this, they're telling me it's an intermittent problem, meaning that it doesn't happen all the time. well i was very surprised because it happens more often than not when i'm driving it... apparently when they drive there are no problems.. WTF

 

a couple quick questions:
could it be because the coils are aftermarket?
how would i clean the valves myself?
thanks

 

Wow! $347 to replace plugs- !! That's awful.

Replaced cylinders-

 

yeah.. ridiculous, i know im not taking my car there ever again

 

alright so i did the one by one method, replaced cyl 1 with a new coil. now i get no more misfires but as soon as i hit the highway, engine light blinks, car shakes, tcs light, all the same deal... now what?

 

i'm experiencing the same issue as well. It all started with a tune up i did myself, new plugs, new air filter etc.


The mis fires began shortly there after,
The VSA and ! lights blazing!
I replaced the spark plugs again, still mismis fire this time 1,3,5 before it was all 6, now just 1,3,5.
I bought new coil packs and now i have an issue in piston 1.
I pulled the coil pack to see if i was getting a spark - ok
I pulled the plug a little gummed up but i cleaned it and placed in it position 2 it fired ok 1 still missing.
I have good compression and the injector is getting signal.
I suspect a bad or clogged injector.

Anyone know of a diy to replace the injectors?

 

sorry i ment cylinder, something broke in the cylinder which was causing it to misfire.

 

UPDATE: hey again! been finally able to fix my problem but only in D3 or D4. when i drive in D5 it doesn't shift into 3rd... odd problem? i guess i can just stick with D4 but i still wonder why it doesnt work in D5
thanks all & appreciate any helpful comments

 

Your tranny may be dying. There is a service bulletin for the Acura TL trannys.

If you use the autostick function, can you still not shift to D5? Does the tranny have really rough downshifts?

How did you resolve your misfire issue?

 

acura rsx has a vvti there for you must make sure "oil level is full" thus also check the "up o2 sensor for fault" this is from a reliable mechanic fixed my misfire problems 1-4 cylinders and random misfire codes and car runs great

 

Hi guy i have the same problem i have 02 rsx random misfire , i change spark plug and coil still not work . Today i try to clean my oxygen sensor with the brake clean , it work , now i know my oxygen sensor need to be replace by the i have the aftermaket cat i think it not good to use on my rsx so i need to change factory cat and oxygen sensor
Hope it help your problem guy , dont waste your money go to deal to fix it
Good luck guy

 

I have a 2002 Acura TL with over 330k miles. It's only had one previous owner who took very good care of it. It recently started misfiring. I took it to the garage and they replaced my spark plugs and one coil the day after I picked it up it started misfiring again. Saturday it broke down on the highway after it started shaking horribly and died and will not start. The mechanic told me that my other coils are all original as well and need replaced. Does anyone know more about this than I do and should I spend more money on other coils? And I thought it was a coil pack not individual coils