Forge RS = SES? P0300
 

Yes another P0300 code thread.

I searched a bit to answer my questions, but didn't really find anything similar to what i am looking for; though i did get some answers.

I installed my Forge RS 3 days ago, and adjusted it to support full factory boost with the least amount of driveability issues. This is my only mod i have installed yet.

Just last night my car threw an SES at me in normal drving conditions. Now i am assuming it is a P0300 code based on what i found when searching.

I have multiple questions:

-Has anybody else had this happen with a Forge RS yet? I didn't find any similar cases when searching. I'm assuming it is the Forge RS causing the code to be thrown considering i just installed it and all was well until then.

-Does a P0300 code mean that your car did misfire and that is why it came on, or does it just come on under other circumstances?

-Is this code really a big issue? Is my car getting Fed up? From what i have read it seems that it's not a big deal, and a lot of Evo owners just drive with the SES on and don't worry about it.

-How do i fix this problem i guess is my biggest issue. I can't drive around with a SES light on all the time, i will go crazy; plus god for bid, i don't want to be hurting my car. Should i just get rid of the SES and hope it doesn't come on again? What are my options? Should i do the dealership flash?

-To turn off my SES light, do i have to go to an autoparts store or the dealership to have it done, or is it safe to just reset my ECU myself? Or will the SES light just turn itself off shortly?

Thanks in advance for any help you guys can offer.

i would go to an Autoparts store and have the code pulled so you know what it is you're dealing with.

For all we know, it might be that you didn't tighten your gas cap enough the last time you filled up - so it could be completely unrelated to your Forge RS.

Is it in Recirc? if not, that is your problem.

Also what were the exact conditions the code came on?

If the Valve in VTA or Recirc has nothing to do with it, the Evo likes it in Recirc with it in VTA it will run Rich i would look at your plugs or gap but the Valve has nothing to do with the PO300 I get it all the time but it is due to my Exedt Twin. If we can do anything to help feel free to call Forge Motorsport 407-447-5363.

Yeah i will have them pull the code after work, but i am almost 100% sure its P0300. I always tighten my gas cap down hard, sometimes so much the black top comes off the actually clearish white screw in part. Plus as soon as the SES came on i double checked my gas cap was tight, and i checked all my fluids and they looked good.

The conditions were normal driving conditions, i actually think i was decelerating out of gear comming up to a stop from going to speed limit.

Anarchy- And i think the BOV definatly has something to do with the P0300 because everything else on the car is bone stock, gap is stock, plugs are stock, etc. Plus the car is a 2005 w/ low miles.

I understand that clutches also send off the P0300 code, so that is why i am hoping it isn't a huge misfiring issue i have on my hands here.

I would buy some BPR7ES NGK's And gap them to 0.025 and start there.

Go to Autozone and ask them to download your fault code with the obd II tester. Then you will know..... but i don't know if you could trip a P0300 with just an RS DV .... but then again i have never looked up the subject

If you don't know the code for sure it really could be anything, so find the code first then let us know.

if it throw the code at idleling or cruising it's boost leakage, if it's misfiring at WOT it's spark plug.

Oh and FYI the obd II reader at autozone can erase your code ... and its free

Unfortunately i don't know of any Autozones in the area, but i'll try Schucks or something. Do i have to buy the OBDII tester or will they just hook one up for me and erase my code?

vboy425 that actually makes some sense because it is a very real possibility that i haven't tightened down the valve enough to hold sufficient boost, because i decreased it as much as possible to counter act driveability issues but still hold what seemed to be full boost. It could be slightly under though...

Thanks guys, keep any other idea comming.

Also, let it be known, i am not blaming any of the issues on the actual Forge RS BOV, this is odviously user/car error.

With the RS you can have it completely loose, and it will still hold tons of boost, well over stock. That is not the problem. I have mine all the way loose, and I hold 22 psi all day.

The check is free from Autozone for the OBD II tester. It can be done in like 1 minute

What are you talking about? Everybody knows all the way loose holds only 7 psi and all the way tightened hold 39.

If that is the case dude you got some issues . The wastegate is made to hold 7 psi and nothing more. So if you got it turned all the down then you shouldn't be hold $hit. KO don't worry man .... stick with the info you got and come back with some more info...we'll get you in the right direction

Sure thing, thanks!

I had the P0300 a while back.. switched from BPR7ES to BR7ES and I haven't seen it since. I really doubt it's related to your BOV/DV.

Okay disregaurd this post. You guys were right, it was stupid of me to jump the gun.

It's 02 sensor, P0134.

Basically i have came to 2 conclusions:

1 It said "no reading" so the sensor completely stopped working, and :mitsu: makes POS cars. And i'm glad i have a 10 yr warrentee.

2 The Forge RS BOV VTA = Rich enough mixture to cause this code and trigger an SES. This is doubtful in my opinion, but a possibility. The car idles fine and feels fine, so i'm not sure how rich it really is, i don't have a wideband yet. I have heard multiple people say the Forge RS VTA works fine, and doesn't cause driveability issues, so i don't know why it would on my car. BUT i have no problem recirculating, i was just VTA for a couple days for fun.

Either way it's going into the stealership to either get a new 02 sensor or get the code pulled and i'll be on my way.

Put the regular DV back on there, or they could blame it on it and deny your warranty claim.

Its unlikey, but unless your dealer is cool, I'd do it if you can {thumbup}

Mine went bad after ~700 miles on my new evo and I was stock.

that would be your front o2 sensor. probably going bad. they shouldn't going bad that easy to begin with. take off your spark plug cover and check the connectors ont he left hand side. if you need one contact kmxxbadboy and tell him vboy425 sent you.
{thumbup}

P0134 02 Sensor Circuit No Activity Detected (Bank I Sensor 1)

Nothing to do with the ForgeRS or any CBV of any kind.

My money is on an unplugged O2 or some sort of ECU wiring riggery.

Sorry to bring this back, but it was the 2nd choise. I since visited the dealership, who pulled an additional "system to lean code." I recirculated the BOV and haven't had an issue since. So anyone who says they run this valve VTA problem free is mistaken.

It has nothing to do with the BOV. It richens the AFR when VTA not leans so the claim has no factual basis.

If you said it threw a rich code, that would have more weight.

haha, sorry, i was in a rush when i posted that. It was "System to Rich".

I knew VTA effected the car negatively, just didn't know it would make it throw a couple codes.

Like i said, since recirced though, and all seems well.

Though i do almost have it turned all the way positive w/ no drivability issues, which somewhat concerns me. Esspecially because i turn it up a turn every time after i drive on the freeway with no issues, and it's only going to take a couple more trips till that thing is as stiff as it goes.

Well KO the good thing is that we got you in the right direction and now the problem is getting fixed. But yeah, FYI this car has a MAF sensor that registers air ,without the recirculated bit it makes funny things happen to your engine. I am just so tired of voicing that fact that i didn't bother to tell ya. But you are now first hand knowledge of the tragedy that VTA causes without a speed density set up. {thumbup}

I know, I know...

It was just for fun, for a couple days though; I just didn't expect it to act up so drastically, and i was in fact quite surprised. Plus i read in some thread that this BOV had zero drivability issues, and no problems VTA. That was FALSE.

Yeah KO there are alot of cars that are different. I have a nagging suspicion though that some of these people that actually have problems don't notice them....maybe they drove $hitty cars before this one (who knows). The important thing that people need to understand is that when you are talking about the tolerance levels of a car is that sensor read rather quickly and things can take a turn for the worse really quick..... but with it all said and done i hope you got all that kind of fun out of your system :lol: , now go have some real fun that doesn't leave you stranded some where or worried ? {thumbup}

Amen, brotha!

I just threw the po300 code yesterday when i was on the highway, Its said 1 of 2 codes and they were both the same....

Now the only difference with the car is that i got an exedy clutch...are the exedy cluths known to threw this code or should i be looking for something else..

Mods are Magnaflow axle back, K&N drop in with cover off, dynoflash(base), and forge bov(not rs)...