Ok so I was driving home the other day after taking the Evo out for a spirited drive and while in boost the car suddenly broke up and lost power. Now when I crank her up she sputters a little but if you try to drive her it she just loses power, backfires and shutters anf my a/f gauge is reading 17+
She threw a ton of engine codes.

P1400-manifold differential pressure sensor.. (I've had this one off and on since I installed a tial 50mm blowoff valve.)
P0340- camshaft position sensor.
P0121 Throttle position Circuit range.
P0113 Ait Temperature circuit high imput.
P0107 manifold absolute pressure/barometric circuit pressure low imput.
P0300 Random missfire.

Now me not being a mechanic I tried to decipher these symtoms and started off figuring the cam position sensor went bad. Alot of my symptoms were described in the forums around this sensor. I read about tubular manifolds heating up the sensor and killing them. so I bought a new sensor and a cool little heat shield from Busher (Thanks Guys)
After I installed the new sensor it still had the same problem. I had a buddy come over and we tried to figure out what we had going on . We did a cylinder compression test and pulled the plugs and looked for spark. My mechanicaly inclined buddy pulled the coil packs up a little as I turned over the engine and he said it doesn't look like your number 2 coil pack is firing and thats probably your problem. So I decide to buy the Sparktech COP system. (nice product.)
I install the new system and I'm still getting the same problem. Now I figure it could be a bad MAF, a bad crank sensor, or a WTF! and I'm hoping that maybe someone who has had dealings with these symptoms can give any imput on what I should do next. I'm reluctant to buy a new MAF without being sure. I've spent enough that now I wish I had just put it in the shop.

OK so new update: I replaced the MAF and its still doing the same thing.
I'm at a loss for what could be causing this problem. If you let the car sit over night you can crank it up and drive it about without going into boost.. but if I boost it, when i let off the gas the car immediatly starts to break up and even if you shut the car off it will not work right for a while.
So now I have no idea what can be going wrong with the car.

 

nvm.

 

i am thinking MAF sensor , did the car die after driving it? if it did check the crank sensor.

 

I am thinking the crank sensor also since they are prone to heat.

 

P0340- camshaft position sensor. you said it, not me

But before you rip everything apart, pull your air filter off and look in your MAF. If your honeycomb is falling apart (or already did) this could very likely be the symptoms of it.

Next step is a boost leak test.

What were your compression numbers?

 

Was going to sugggest that as well. Def do a boost leak test..

 

+1 sounds like you have the same problem as me. It was my maf screen was messed up.

 

MAF it sounds like. had this problem with my Eclipse Gst once.

 

Probably not your crank sensor- if thats bad the car won't start

 

I have the same issue after installing the new Tephra V7 with EGR delete. My car started fine for the first few days then quit. I'm getting a new battery and will post my results soon.

 

When I had my car tuned for my6265 turbo Mellon removed the honeycomb from my maf so it wouldn't get sucked into my big turbo so it's not that. But the maf itself could be bad I guess.

 

Ttt

 

what were your compression numbers???? Also the timing belt still has tension right? if you want i can pm you my number and I can help walk you through a few things on the phone.

 

my numbers were between 170- 188 on all cylinders as far as I know tension is good , belt is tight, i checked timing marks and all seem to line up.

 

are you on evoatlanta.com?

Did you check for spark after buying the COP system?

May be willing to come help-in Columbus