I just got the 03. The mods is ets ip kit, cams (unknown/supposedly), fuel pump, forge bov, stock turbo, 3 inch dp full exhaust, and tune. I've done my research and just about the only testing I have not done is on the coil packs and compression test. I saw the post about upgrades and thinking about getting coil on packs. Any suggestions?
My problems is under wot, it will start to like miss fire or something every now and then. It had ngk brk7es I was told it was tuned on brk7eix. So I put them in. Helped out a little. My vacuum is around 6 to 7 at idle I turned the boost down to 18 and still does it. My afr under wot is 10.7-11.3 when it doess the little jumping back situation, every now and then it will hit like 12.1 but not all the time.
My mods to do coil on plug, port turbo mani, upgrade turbo, and tune. I dont want to start on that until I get all the bugs out. I fixed both boost leaks and now I do not know what to do. I know its hard to say, when the car is not in front of you also is the problem quite common on these cars? Only asked cause I've seen alot of post about it.

 

make sure your plugs are gapped correctly. WOT missfire sounds like spark blow out

 

They are at .26
May not be misfire. Idk could be its just getting to the point where I'm about ready to drop it off and pay some one.

 

BRK7ES does not sound like the right plugs...

I have an 8 also and have ran BR7ES or BPR7ES for copper plugs. For Iridium, I have only ran OEM. Never ever had an issue with spark.

http://www.extremepsi.com/store/home.php?cat=567

 

To only have 6 or 7 in/HG at idle is low unless they are are giant cams. Check timing first. If that checks good, do a compression test. If that fails, do a leakdown test.

 

Sorry they were the copper so I went to iridium. Ok I will try to check the other things when I get time. I hope it is nothing internally. It just started like not to long after I bought the car. Hasn't always done it.

 

So is the BOV recirculated or VTA? If it's VTA you might get that missing or stuttering sound and feeling at higher RPM. My friends VIII does that, but he likes the sound of VTA so he lives with it. If in fact this what is going on.

 

It is recirculated

 

Also does anyone else have this problem? Every now and then when you first start it up. Its almost like it is skipping until it warms up a bit.

 

have u checked for boost leaks again and at what pressure? because thats a very low vacuum.
can u verify those spark plugs? that "k" seems rather odd. iridium is IX.
is it really tuned?

 

are you talking at low speeds (0-10mph)?
if so, I think this is a turbo thing. My s13 would do this when it was cold/cold weather and hadn't warmed up yet.

 

Its suppose to be tuned. At full throttle 25 psi afr is 10.7-11.3 factory turbo. And ill have to check the part number on the plugs again. I havent had a chance to do another boost leak test but last time I checked it. We did around 30 psi.

 

BPR7EIX NGK is the ones I just put in there

 

Just want to say I finally got it right. I bought everything to do a coil on plug set up, regapped spark plugs, and alot of other stuff. Only to find out gapping plugs with that coin gapper was a stupid idea. Spent the money on a better gapper. Couldn't be more happier.lol