Nkmndz

I really need some help. I have a 2005 Acura TL MT. It has 105k on it and i'm getting all these codes. P0300 P0301 P0302 P0304 P0303 P0305. I have changed out the spark plugs and coil packs with brand new parts.

I cleared the codes a couple of times but they keep coming back. AND the weird thing is I cant really tell in the engine perfomance while driveing it's idling fine and drives fine. IT does use a lot of gas, but i just thought it was because I need to change the oil. Please anyone help me out tired of having the dam light on.

EvilVirus

iTrader: (8)

http://www.obd-codes.com/p0300

acrdr

most likely you need a valve adjustment
i have seen out of adjustment valves cause misfire codes

1islandparadise

I had a similar issue with mine (P0300, 0301, 0305). I returned from the dealer and they erased the memory for the stored codes and reflashed my computer. I to changed my plugs and coil pack before going to the dealer.

Note: My CEL would only turn on during WOT runs. Under normal driving conditions, it would never trip the CEL. Hopefully this helps.

Nkmndz

thanks, I will get that done too!

Nkmndz

I heard something about EGR guides being clogged, has anyone else had this problem?

EvilVirus

iTrader: (8)

EGR is simple to clean just need some hand tools and tb cleaner and a wire brush

andrewg

MT...has it ever been over-revved?

hotwheels1

Check your injectors, can cause misfiring...only problem is your missing on all but one cylinder. Like swap any other with number 6. All po301-306 are mis for each cylinder. 300 is just random misfire. Remove each coil plug one at a time with the motor running and see which one doesnt have a change in idle . Hold the brake and give it gas while In drive, not for long. Can help pinpoint when your getting the mis. Cleaning the egr passages can't hurt. Wouldn't be bad if you had a smaller scanner and could see the fuel trim.

Nkmndz

Thanks, I'm going to try both hopefully it's one of the two!

Nkmndz

Actually it is all cylinders I'm checking them out tomorrow. How would I know if they are?

nfnsquared

Never heard of this for a J32...just saying....

Ding, ding ding....

hotwheels1

Well you know which Cylinder is dead by no change in the ldle or do you mean the fuel trims?

pohljm

Sounds like over rev on a manual

SurfingScotty

I threw a P0134 a couple months ago but yesterday got a misfire detected notice on my navi screen.

Per AutoZone:
P0134 (Rear A/F bank 1, sensor 1 heater system malfunction)
P0301, p0301, P0302, P0304, P0305, & P0306
P0300
105,000 miles currently. Tming belt service done 90,000, MT Type-s. I rarely do full redline accelerations and to my knowledge the car has never been over-rev'ed
Have not noticed in change in driving or fuel consumption.

I just bought an NGK O2 sensor and plan to start with that. Thoughts/suggestions?

SurfingScotty

Anyone?

SurfingScotty

Since no one was able to help, I made a little video myself on how to execute the upstream O2 sensor. Enjoy.

stegey

i agree with acdr, i have seen out of adj. valves cause this on many honda engines. some too loose some too tight .

joegold567

When was the last time you adjusted your valves?

nfnsquared

Again, I find it hard to believe that the OPs valve clearance settings are far enough "out of spec" to be causing misfire code. At 105K, J32 valves have proven to be barely out of spec.

And the OP hasn't answered the question about over rev. My bet is it was over revved.

joegold567

Couple of years ago I got the same codes, I believe it actually turned out to be my fuel injectors, I did a valve job ( valves where out of spec but not by much) replaced coil packs and did new plugs.
worked for about a month then came back
frustrated I bought sea foam and put it in my gas as a last resort ( I didn't want to have to take the car apart again just to replace injectors ) and believe it or not I never had the codes show up again. went about 30,000 miles then ended up trading it in. still ran pretty good.

but that being said it could be ECU too I agree with nfnsquared you might need a reflash.

misfire codes can be a pain in the butt sometimes

stegey

in reply to Joe , i haven't done it yet been too lazy , i've got 99k on da clock , next slow time at work i plan on it if i feel motivated.

i just did an 07 accord 2 weeks ago , most were a lil loose but one cyl, they were too tight.

i have seen the misfires from valves , that being said it was on a higher mileage vehicle .

the fuel we get now dayz is crap especially the corn or ethanol, as far as i know they are allowed up to 15% without even telling us .

i have seen it clog gm and ford injectors , not a lot on honda's.

i buy ethanol free for all my small or air cooled engines , it is extremely bad on the lil guys.

my advice is free only 27yrs experience , take it or leave it you won't offend me.


if you are looking for the best fuel treatment ,, sea foam is good ,, the best is 44k from BG products , way more expensive but it is 95% cleaner . the others are 15% cleaner 85 alcohol.

SurfingScotty

My 07 6SMT TL Type-S was throwing all kinds of codes including misfires. A $125 OEM fuel sensor replacement (video documented above) was all that was needed for mine. No valve adjustments, no replacing injectors, coils, ECU's, etc. start with the cheapest/easiest/most likely fix first.

nfnsquared

Yeah, but you had a P0134 along with the misfire codes. The service manual says to fix the non-misfire codes first, which you did.

The OP didn't list any codes but the misfire codes.

remspot

I got the P0300 and other P0301-P306 three weeks ago when my 07 TL Type S MT was warming up on a cold 20 degree day. I just bought the car so I was only informed that the spark plugs were replaced 20k miles ago. I removed the front coil plugs one at a time and the engine changed tone each time. I removed one spark plug and it seems to look great. I removed the EGR valve and it was clean. I found a vacuum leak on the capped motor mount solenoid. I fixed that and used my flashpro to reset the codes. I thought the code was fixed but it just came back today. P0300, P0304, PO305. The previous owner did a valve adjustment when he replaced the timing belt at 105k. He did install those spacers to the throttle body and intake manifold. Could that be causing it? It runs fine but is it save to drive? I'm at work with it so I'll try to reset them again and see if it comes back on...