Hi guys
My tl-p 02 is running great with the new transmy installed 2 months ago .
So today I went for a WOT sportshift in 3th gear at almost red zone and Engine light flashing for a few seconde ...slowing down and the light stop
flashing ......a few minutes later do the same WOT in 3th gear and same reaction....
Got home and scan the ECU and get the multiples misfires P1399 ....
What do you guys think that I got ???Bad coil or O2 or injector ?

 

how are your spark plugs? mileage wise? and take a couple of them out and check them out for any pre-detonation, fouling

 

Remember I did change my plugs a week ago to NGK Iridium but swap them back to my original Double Platinum with 90k miles on them 'cause I did feel a lost of power with the Iridium .
Do you think my old plugs are fouling ?

 

might be. or majority of the plug is covered in carbon deposit and its hard to get a spark at higher rpm.

 

I will try to check and clean them this week-end .
So you do not think the problem is fouling coil ????

 

spark plug fouling. was it doing the same thing with the new plugs in? recheck the gap.

 

No , with the Iridium the car feel slow to accelerate and response .....so I put the old plugs back and the response is a lot better ....
Now with my WOT in 3th the car pull strong and accelarate great but got the flashing Engine light ... P1399 ...
Just want to have your oponions in which direction to attack the problem ...

 

put the new ngk plugs back in after a good seafoam treatment to rid carbon from pistons and valves-injectors etc
Then it can deal with WOT- gas doesnt ignite well on piston carbon layer~

Your mind is fooling you- old plugs are not better than new- assuming gap is correct on all the new plugs
One ziner found 1 ngk plug gap incorrect, so it can happen

The codes often mean several things- WOT will superheat heat the cat and cause codes
My question would be- when you got a CEL the 1st time why did you push the car again?

 

Amazingly this morning ,after arriving to work and scanned the ECU again and the code is gone .....
What make the code desaspear ???Can you guys explain .

My question would be- when you got a CEL the 1st time why did you push the car again?

Because remember reading somewhere in the Racing/competition section that
some members while doing WOT got the same flashing Engine CEL at almost red zone and the light was gone when slowing down .....he said it's was normal

I will pull the olds plugs out and check them for any sign of rich/mixture or gap .And will give the Iridiums another try ....

But how you guys could explain the Code 1399 just disapear ????

 

it used to happen to me in 3rd gear at wot close to redline after i installed the lightweight crank pulley. It didint affect anything and it would just blink it would never stay on and the ecu would erase it almost immediately. I just forgot about it and after about 2 months it never happened again.

 

Glad to hear from you I know that I hear it from someone in here about this problem . My ECU erase the code P 1399 the next day only ..
Now my car is running fine .
Did you notice any decrease of performance after flashing CEL ?

Thanks man .

 

Nope no decrease in performance or anything. Just a blinking CEL and an almost immediate (maybe a few hours) code erase. The CEL blink would stop once I shifted gears. I figured since the engine was spinning so fast compared to the when the oem crankpulley must have caused the random misfire. I was guessing after the ecu "learned" the pulley and that fixed the misfire prob.

 

what spark plugs would you guys recommend using? Reading all these good plugs and better plugs make me wonder which plugs to invest in. 4, 2, or just a regular single electrode? Bosch or NGK?

 

USE ONLY NGK Iridium IX(upgrade on gen2 and came stock on gen3) or NGK Platimun (stock for gen2)

NO bosch!!!!

denso is approved but cost more and last less miles

No multi electrode bs either- the TL needs a super fine wire setup to work with the coil on plug ignition

 

NGK Iridium IX- These plugs are gr8. 01tl4tl told me about them years ago and i havent looked bak since.

 

USE ONLY NGK double Platinum or maybe NGK Iridium IX only , nothing else please ! ( double Platinum 'cause NGK has Platinum only too .)

A lot of members switch to Iridium IX with no problem at all but my experience was a bit diff ..... but I will give the Iridium IX another try .

 

thats what ive been eyeing..its what I used on my integra. Just wanted a few second opinions.

 

Was the root of this problem ever found? Experiencing same thing - blinking CEL at WOT in 3rd (4k+ rpm). Have not taken 4th over 3k rpm. Blinking is only indication of malfunction; no stumbling or roughness of engine. Idle is fine. P1399 found as pending code, no solid CEL at all and no other codes. Can get it to blink on request 80% of the time by simply flooring it.

 

Video:

http://www.youtube.com/watch?v=b49ApuN3aBo

 

the light resetting itself is because for minor issues (random misfiring) the ecu throws what's called a soft code.... meaning it's gives the car a chance to correct itself, if it's something more major (bad o2 or other sensor, coil, something it has no chance of correcting on it's own) it throws a hard code, won't reset untill back up fuse is pulled (have radio anti theft code ready) or reset with a code reader.

 

oh and the blinking is letting you know to back off so the ecu can check to see if problem is resolved..... if not it will throw a hard code.

 

blinking check engine light means that its misfiring. check ur spark plugs, clogged cat

 

Wouldn't bad plugs cause a misfire at idle? My idle is fine; seems like the misfires happen at high engine speed.

 

it can happen at idle or at wot. fouled plugs or oiled plugs/ burnt plugs will all cause misfires

 

Okie dokie...I'm gonna change the plugs soon. But just trying to think ahead in case new plugs don't solve it.

 

is ur cat clogged? can also be one or more partially opening injectors. or clogged injectors. run some seafoam in the gas tank and through the vac port

 

Yup, ran some seafoam already...that's when I discovered how common the misfire was thanks to the seafoam "blowoff" stage. From what I remember to determine clogged cats you do some vacuum readings and mess with the throttle; any other way you know of?

 

Interesting. Did an oil change, tried some WOT runs & no blinking CEL / misfires / P1399.

I will mention this was the first change since I had the car, and it's been about 5k miles. Don't know what was in it before as the dealer claimed to have done a change for sales prep, but I put in fully synthetic (Mobil-1).

Bad part is I didn't change the filter. Thought I had bought the filter and it was in the trunk but after I dumped the old oil out & was about to do the filter, looked in the trunk & no filter. Found the receipt & I guess the guy forgot to ring it up & put it in my bag 'cause I know I grabbed it off the shelf & had it in my hand at the register.

Remains to be seen if P1399 comes back.

 

Go buy a new filter. You can change it out and the only oil you will lose is whats in the filter. Just top it off if low.

 

Nice. I was envisioning a nasty mess if I wasn't super quick (and I'm a slow poke with cars).

 

Came back today. Guess the oil change wasn't the [sole] culprit.

Gonna just do a full change of the oil and put conventional in - car seems sluggish with synthetic.

 

Have you ever find out what it was ? I have same issue i changed all coils n spark plugs cleaned egr and injectors. I even did compression test and adjust the valves. I think egr and o2 sensors are next on my list. CEL flashes at the high rpms and sometimes throws the misfire code usually its 3/4/5 cylinders but sometimes all of them. After i cleaned egr car is running much much better but something is still not right. Anyone ?

I also recently found out that my runner was cracked by cylinder #4 i replaced both runner and used all new oem gaskets.

 

so i found that my compression on cyl 5 & 6 was low ->> new engine

i