csmeance

Clogged cats are becoming more common of an issue as the TL is getting higher and higher mileage. You can probably swap both heads, get the old ones rebuilt and sell them to make money back. That way you have little downtime and your car is good to go!

Don't forget to gut the front cat too!

energyblue98

you think I should do that rather than swap the engine out with one with lower miles?

The front cat is still fine and in tact, I've tried gutting a good cat before and it's hard if it's not already blown...

csmeance

An engine swap will be a lot in labor, probably 1K. Why take apart something and replace it unless you really need to! I'm sure you can find a set of heads for around $700 and swap them in, get the old ones fixed for around $500 and sell them for around $700!

energyblue98

Oh I'll do the engine swapping I'm not going to pay someone to do that...

And i think this is good justification for doing it since the current engine has 180k miles on it, I can swap in an engine with 55k miles on it instead and keep running for 10 more years!

csmeance

sounds like a great plan keep us posted!

energyblue98

I actually might be getting eric the car guy to do a video on the engine swap..

Nyordrms

iTrader: (1)

is there anyway to tell if cats are getting clogged? I've been having misfire problems with my 08 tl-S but it only does it in extreme cold weather,

and only when it sits idle for quite a few mins,

J32FurrowG23

Sorry for hijacking thread I'm new here and cant seem to find any information. I'm a licensed technician with Hyundai, and run Acura/Honda for my personal vehicles, this (2004 TL) is the first V6 Ive owned. I talked to the guys at the local Honda dealership (we have no local Acura) and they suggested when doing engine replacement to drop sub frame tranny/engine as an assembly. Im doing it at my garage at home with no hoist, has anyone pulled one out of the top?

EM2typeflex

Wow! This seems like a common problem with tl's.

Well, all the usual as everyone has already described if happening to my car.

Its at 160k miles, probably never had a valve adjustment, and I can smell a slight tinge of gas (thinking it might be a plugged catalytic converter).

EM2typeflex

just an update for anyone who might run into the same problem.

in my case, it was just 1 bad ignition coil triggering misfiring in all cylinders.

Nyordrms

iTrader: (1)

how did u find out which coil was bad??

EM2typeflex

using an extra coil that was good, mechanic swapped out a coil one at a time until he found the problem coil.

turned out to be the front left coil near the oil dip stick.

DR522

Ok so my wife has a 2010 TLN SH-AWD 6 speed 3.5. About six months ago she took it to acura for maintenance they did the timing belts water pump ect. Then about a month ago we were driving and the car started hesitating and running rough like it was misfiring. We had it towed to acura, they said cylinders 2 and 6 were in fact misfiring and they couldn't figure out why. After a week and 300.00of diagnosis it they said it was the computer causing the issue and it just needed to be reset. The day after we got the car back in noticed oil on my garage floor when my wife pulled out. Went back to acura they said it's that camshaft seal leaking and it would cost 600.00 to fix. We opted to get a second opinion but my wife continued to drive, then yesterday the same misfire symptoms when I get there is check oil even though the sensor didn't show it low and it appeared to be low so I added oil and start the car and it idled really rough we had it towed to a mechanic shop who specializes in Honda and acura cars they ran a compression test and cylinders 5 had 60 psi 6 had 30 and they say we need an engine and this will cost 6 to 7 thousand dollars my wife brought this car brand new and we just paid it off this year any ideas. Really can't afford

Djmatajr

I have the same issue after doing timing belt timing is still set properly no misfire but all have misfire sh-awd, hill start assist, vsc, and engine emissions lights all on no feeling of miss and drive ok for the most part without awd feels like a boat any help/ tips appreciated

Djmatajr

find the issues adjusted 5 while at 6 re did adjustments today and everything is a'ok

UA6 6MT

Do you know if this fixed Rooster's problem. He never posted about it again. Experiencing the same problem in my 04 6mt

Slpr04UA6

^I am not sure. It worked for me.

I dislike when people never return to a thread, and update whether it worked, or what did fix the problem.

Also I am not sure if the TSB was for all TL's.

horseshoez

iTrader: (2)

Include me in the camp of folks who had a single bad coil which caused the multiple misfire errors (on my J30 equipped Accord). I swapped the coils around, found the offending coil, replaced it, and my engine has been good to go for the last 30,000+ miles.

03max6spd

Hey guys, im having the same issue, car has 164k miles the car runs fine, doesnt run rough or idles funny at all. The car was never over revved or anything crazy, just turned the car on one day and there the check engine light was. Im going to have the valves checked.

justnspace

iTrader: (1)

^either cat is clogged, over-revved, or bad coil/spark plug...c'mon man read the threads..

UA6 6MT

It's not my coils. Hasn't misfired since that day but I am getting an irregular idle at lights and rough starting. Narrowing it down to my Port and Polished J32A3 Throttle Body with the IACV Coolant bypass. I believe the mods to the throttle body are causing it to fail and need of replacement. Buddy is parting out a Type S so gonna take his Upper plenum and TB. Going for the EGR as well.

UA6 6MT

Going over this stupid shit with you again...
Cleared Cats with no success. Car now smells and sounds like shit due to the thick RV6 HFPC chamber. Thanks for the bad advice you fuckwit.
No bad coils and the harness is good. Spark plugs were changed. They looked brand new when I removed old plugs. Keep thinking you know what you're talking about buddy

justnspace

iTrader: (1)

^LOL! sucks to be you

I have a perfectly working car and you dont. LOL

thoiboi

No one told you to GUT your cats ya idiot

Your inability to process information given to you and then getting angry at the messenger on the Internet really shows your age and maturity. Tone it down and consider this an official warning.


How do you know you don't have a bad coil?

justnspace

iTrader: (1)

trying to blame me for his mistakes

UA6 6MT

For real! No misfires though. But I did get a bad steering sensor and brake sensor from me code reader but both are in good working order. Starting to think it's the ECU but the rough starting and rough idle has me suspicious of my modded TB. Port and polishing does decrease the life of the TB so maybe it's that or maybe it's an upper plenum gasket leak. Could be 20+ things

thoiboi

I also love that over a month after your initial thread here: https://acurazine.com/forums/3g-tl-p...-960137/page2/

did you bother to tell anyone that you had a P&P throttle body.


You're your own worst enemy. Don't give people all the information regarding your car and then expect us to play detective as to why it's running like crap.

justnspace

iTrader: (1)

troubleshoot by going back to stock.

UA6 6MT

Well it wasn't just him. This was Andy Gerzina as well as him that suggested it was clogged Cats. Fuck it. Gutted em and now i lost some High End torque. Last time I take advice from online "mechanics". I guess it's my fault but it is proven that bad cats don't create misfires but a misfire creates bad cats. That's why the CEL will blink. It's a mechanism warning you that "hey this misfire will damage the cats and O2 sensors. But hey I listen to idiots it's what happens

UA6 6MT

Yes Andy and my mechanics at Honda all know but it's just a guessing game. Even hooked it up to a Snap on diagnostic machine and could not tell what is wrong. My guess is the TB.

UA6 6MT

Just a complete assessment now:

Gutted cats with Defoulers No CEL
Starts rough and idle is irregular (occasionally)
No loss of power and compression is normal (no bent or burnt valves)
Hmmmm....
Received new TB gasket and upper plenum gasket for my new J35A8 manifold and TB.
Suspecting the TB now with the IACV Coolant bypass (which helps in hot weather as such in FL)

thoiboi

Link?


So you're implying that if I were to throw a clogged up cat onto my perfectly running car, that it won't misfire?


Your lack of personal responsibility is astounding... It wasn't "idiots on the Internet" that caused your car to misfire..

thoiboi

.

UA6 6MT

No it will. But nothing would cause a cat to clog unless it was severely old or a misfire occurred causing unburnt fuel to enter the cat and melt the interior honeycomb

UA6 6MT

And I never said a clogged cat wouldn't cause a misfire. But a cat that has nothing wrong with it wouldnt cause it. I explained that the HFPC were less than 2 years old

thoiboi

I'm not putting words in your mouth, I'm quoting exactly what you said, which was:

justnspace

iTrader: (1)

i dont think you lost high end torque. you most likely gained high end torque from gutting cats.
that cats are the MOST restrictive exhaust pieces in our car.

and "last time I take advice"...yet you're still here taking advice from us.
it's not OUR fault your car is acting up. it's not OUR fault you chose to gut your cats.
i'm sorry your car is acting up.

but the advice is still solid advice and is what I would do if my car was misfiring...

1) fill up with new gas, maybe gas is bad.
2) troubleshoot coils and spark plugs.
3) made sure I didnt over-rev by performing a leak down and compression test.

UA6 6MT

Lost high end torque from lost back pressure. Did all that. Still inconclusive. Said fuck it and started dailying the racecar until whatever is breaking breaks. Tired of replacing shit that doesn't need to be replaced

03max6spd

The car does not have cats, i dont over rev the car. And the spark plugs were changed brand new in january. I HIGHLY doubt every single cylinder is actually misfiring. Ive read the threads and im still confused, hence why i am here. I took the car in for a valve adjustment and they were within spec and didnt need adjusting, So i am stumped as to what it could be.

Nitsuj16

So I am desperate for help and I am reaching out to this community saying if there is anybody that has had similar issues with a 2004 acura TL, I have been to about 3 different mechanics that have not been able to solve the problems my vehicle has been having Is one of which was an accurate dealership. So the problem with my engine is it reads misfires on cylinders 1 through 6 And when I start up the car initially when I go to go somewhere it has a really rough idol and start to it also when I put it into drive it will stall on me and the acceleration will feel really really rocky, They have aftermarket coils and spark plugs in it which I was told should be compatible but edible but I am not entirely sure or all the mechanics that I have been to have checked numerous numerous things that could possibly be wrong with it and I have not yet found a solution for this the most recent mechanic I took it to had it for about a week and he said he did about everything he could to find out what the engine was doing and still could not figure it out So he referred me to a performance center it's a performance center that specifically deals on Mazda's and acuras that I have not been to yet. However he referred me to them because he believes it's a possibility that it could be a computer problem. And again I am just reaching out to numerous sources and numerous resources trying to solve this problem as it is my only vehicle that I heavily rely on is lion if anybody has any information or tips about any of the problems that I described please contact me@4352991706 or parryjustin563@gmail.com