So I finally got my car running, after much too long a wait!

But I got the following codes on my car last night:

P0447 Shutoff valve activated
P1133 oxygen sensor adaption (lower load range bank 2)
P0300 misfire detection
Then a misfire detection for each cylinder 4,5,6 (didnt write down each code #)

I got the same codes a day earlier and cleared them, only to have them pop up again after driving it for less than 30 mins. I just did a vivid 650 kit w/ 60lb injectors, put in a new air filter, Denso plugs, GT2 IC's, Greddy Profec

The misfire/hesitation is only really there under 3 or 4k rpm, and it I can definitely feel it when driving around town under light/part throttle or idling. Pressure test was fine, no leaks,

One thing a friend of mine brought up is possibly fouled plugs, a couple weeks ago I had some issues with the EBC being hooked up improperly from my shop and I was getting boost spikes well over 1.5 bar, he's saying that this could have fouled the plugs, but I doubt it would foul the plugs on just one bank?

The other issue I can think of is something wrong with the dreaded Variocam, it seems like issues with Variocam are usually bank specific, but what other symptoms should I check for if its Variocam related?

Finally I dont think this its the MAF, but I was thinking of changing the MAF and plugs at the same time, see if it helps, as far as I know MAF is original, car has 55,000 kms on it, but from what I know on these cars it wouldnt cause a problem on just one bank....

Any input/thoughts are much appreciated, especially if they dont mention having to pull my engine out again and replace a whole bunch of parts

TIA

 

NGK bkr7E 3 dollar plugs and replace that old MAF. Or have them resend you the file it might be that.


S

 

Coil Packs....

 

+1

Thats my guess.

 

Thanks guys, I'm actually thinking that its not MAF related, being one bank only. So i reset the codes, started the car and it idles fine, no CEL or misfire codes

Also pulled these numbers using Durametric just now, MAF is reading 22 @ idle, which i know to be normal and Hot Film MAF numbers around 1.4 @ idle, can anyone confirm if this is normal?

I didnt take the car over 1800 rpm, but i got some odd numbers below

The numbers I am getting are for "Adaption Range 2 on Bank 2" These numbers start at 0% move up to 1% then jump to the high 3% range, i am guessing this is ignition adaption on bank 2 which is the bank i'm having problems with.... not sure if this helps diagnose the issue at all, but i guess it narrows it down to something ignition related, plugs/coils? The same Adaption Range for Bank 1 is around 1%......

 

Plugs or coil packs..

 

How long have you had the plugs in for?

 

the plugs have been in since i installed the turbo's etc, less than 100 km's, but at i noted above i think they could have gotten fouled with high boost spikes that i got from the EBC when it was hooked up wrong, i'm just questioning the plugs fouling all on one bank.....

 

If I where you I would try a new MAF. Recently my car was doing strange things and it turned out being a bad MAF. It would be cool if you could have someone local to you try their know good MAF take it for a short drive and see if it makes any difference. If so then you've found your problem. I don't think doing this would damage the MAF you are borrowing.

 

Ask Markski. I think he said a few times that overboosting can kill your plugs.

Most likely plugs. Don't get all hung up thinking stuff that you didn't fiddle with broke during the upgrade. Re-check everything you touched, including injector harness connection.

Be patient, it's all worth it, and unfortunately part of fiddling sometimes...

 

Thanks everyone,

so the plan is Saturday change plugs and MAF (cant hurt if its original) and recheck all the connections surrounding the ignition, then go from there!

Ari, if you only knew what i've been through on this install, lets just put it this way, they've had my car since April, and i just got it back a few days ago, shops here in Dubai arent exactly at the same level your basic shop is there, and if it wasnt for Dan replying to all my emails, sending parts out quickly, and generally just being very patient with the guys i deal with here it would probably still be at the shop now.....

But i know it will be worthwhile when its done

 

MAF is literally a few minutes. Might as well do them separately. That way, if you have the problem again you'll know exactly what to do! Plugs first IMHO

GL
A

 

Thanks ard,

doing plugs tomorrow, will let you guys know if thats the issue

 

check the coil packs and all connections while you're there.

 

I feel you pain brotha...

But than again, you have a high HP car in Dubai. How fun is that?