Luis Rivera787

Alright guys please help me out anyone so I have an 03 tl type 's it's misfiring in 5 of the cylinders I changed the spark plugs iv checked the ignition coils I took apart the upper intake to clean out the egr ports iv done it all. So when Im at full throttle it down shifts just fine but work go no where it's not the transmission because when it's in park it does the same thing it stops at 4k rpm I can hear the motor misfiring like it has 2 step anti lag system but the car is stock I'm not sure if it's the fuEl injectors or it might be time to replace the timing belt does anyone know?? Please and thank you.

teh CL

iTrader: (1)

Could be a clogged cat

Luis Rivera787

I deleted the cat I thought of that too.

thoiboi

what plugs did you use?

Luis Rivera787

Ngk laser iridium

thoiboi

Are you getting a CEL for the random misfires? What kind of gas are you using?

Luis Rivera787

93 octane chevon gas is all I use

Luis Rivera787

Cylinders 1-5 are misfiring number 6 is fine that's what's weird

thoiboi

You've got a bad coil. Start removing them one by one and see if there's a change in idle. Because you've replaced all of the plugs, it's narrowed down to coil.

Remove one by one and report back removal of which bank does not change the idle.


If that doesn't work, go and clean your EGR valve and port.

Luis Rivera787

I did all of that I switch coil 6 to cylinder 1 still the same problem
​​​

thoiboi

which coil didn't change idle?

Luis Rivera787

They all changed idle

thoiboi

So all 6 coils changed idle? if so

Luis Rivera787

I cleaned the egr ports in the upper intake manifold and egr valve it's self

thoiboi

well shit.. i don't know now. Throw in a bottle of Berryman's b12 in the gas tank and clean Throttle body..


If all else fails, junk the POS!

Luis Rivera787

I did a full induction and fuel cleaning

thoiboi

it's dead jim. i got nothing.

Luis Rivera787

Well damn thanks tho lol

Kris9884

I had all the same symptoms and a combination of cleaning the EGR, new plugs and one new coil fixed mine. Make sure the EGR maze and ALLLLLLLL of the little holes that go into the lower manifold are cleaned and not clogged. I know you said you checked but check again, there's nothing left it could be. Maybe a bad harness or something. Try resetting the ECU again.

Luis Rivera787

I cleaned out every egr port and egr itself with a wire brush and blew it all out

Kris9884

So have you cleared the codes AND reset the ECU? If so, you're saying they still all come back? Time to push it off a cliff.

Luis Rivera787

I cleaned out every egr port and egr itself with a wire brush and blew it all out

Luis Rivera787

lol naw dude I love this car I haven't reset the ecu how u do that??

Hazsun

Do you get any other codes beside misfire 1-5? How many miles on the car? Could or maybe need valve adjustment?

Luis Rivera787

220xxx miles where can I got get that done

Kris9884

1. Insert and turn the key to the second position where all the dash lights and accessories turn on, turn off the AC and radio.
2. Remove the key.
3. Insert and turn the key to the second position again and immediately press the gas pedal to the floor and hold it for at least 30 seconds.
4. Remove the key and release gas pedal.
5. Insert key and start the car.
DONE!

If that doesn't work, disconnect the battery cables for like 30 minutes but you'll have to reset your radio settings..

horseshoez

iTrader: (2)

Just another datapoint...

My OBD-II reader reported misfires on four or five cylinders on my 2001 V6 Accord; one new coil fixed the issue.

Luis Rivera787

Wait a min are u telling that the coil system works like Christmas lights??

horseshoez

iTrader: (2)

No, not exactly. With some Christmas lights, when one bulb goes out, all of the rest of the bulbs downstream go out as well. On these V6 engines it seems one bad coil will only impact one cylinder, however, what comes out of the OBD reader is misfires all over the map. At least that's my experience.

gnuts

iTrader: (1)

disconnect the battery or remove the clock fuse which is in the little panel when you open the passenger door. (it's there on my CL, so I'm assuming it's the same on the TL).

I still think it's a bad coil. If you've never replaced any coils, just order a 6 new ones.

When the car is idling, if you hear loud ticking from the engine then your valves could need adjusting back into spec. Note that your purge solenoid might also be ticking which is near the drivers firewall (small black thing)...you can put your finger on it and feel the tick. That's not to be confused with valves out of spec.

Tosh

If it hasn't had the valves adjusted since new, then this would cause those misfires. OM says check valve clearances at 105k. A handy person could check and adjust the clearances. That's how these motors often blow: by burning an exhaust valve that has receded into the head and gone tight (no ticking).

(Otherwise I would say replace all coils.)

horseshoez

iTrader: (2)

Whatever you do, do NOT replace all of the coils; change them as they fail, and right now, if coils is the OP's issue, there is only one bad coil.

Tosh

I was traumatized by two coils suddenly going out at only 111k, so I say get them out. Move on to the next step in the diagnosis: valve adjustment.

Kris9884

Yeah, I still say its either a coil, plug or EGR. good luck lol