possible boost leak, and or bad plugs. good thing is that you have Aaron and the crew to help you out. GL. keep us posted!

 

I drove Elree's car as well and heres what I experienced: During throttle of less than 50% the AFRs are running a consistant mid 14s, but when you accelerate beyond 50% the AFRs dramatically falls below 10.0 AFRs, on lower gears 1st to 3rd the car stumbles alot around 3000rpms w/10.0AFRs, but after that it accelerates fine but the AFR gauge still shows 10.0 (the lowest reading the guage can read), in fifth gear below 3000rpms the car doesnt stumble but still reads 10.0 AFRs. It also stumbles really hard after shifting through the gears(like you would when your at the track). Before, the car died a couple of times already, and we check to find out that the power feed line from the 255lph Walbro popped off from its clips (I have never seen that happen before), as a result, we finally zip tied the plug tightly to the clips. We all tried different things to help fix the problem like, tightening the IC pipe clamps,did a boost leak test, and cleaning the MAF sensor. I also found that when we took off the intake to the turbo inlet, that there was a lot of residue, or sludge, not too sure if that was a problem or not, but then again I couldnt really see that clearly. IMO, Elree needs to get his Evo retuned, or at least see if Aaron or Lucus can have a check from their more exerienced eyes.
Hope that helps the details, good luck Elree

 

I think it likely has a boost leak if its gotten to that level. That is the only thing that would explain the air fuel swing. We are more than willing to take a look at it and make it right.

edit- just noticed you checked that already. We will have to dive into the car and see whats going on.

 

Thanks for chiming in' I'll bring it down to the north end Dyno day on 18th or 19th. Looking forward to it.

 

Sounds like you might want to do a boost leak test before the date. Just to maximize the time the guys can have with your car. I don't know that they would be able to take that time on the dyno, especially depending on turnout, and wouldn't want you to be discouraged if they couldn't do that for you. Best of luck!

 

I leaked tested it last Friday to about 28 psi. Overall it's pretty solid. I don't like the 3 inch coupler clamped down to the stock IC piping, but that's what came with his car.

 

^ boost check already done, every maintenance check done, checked the sparks too, will let Aaron decide on it

 

I would get some new Iridiums in there too Elree before your retune. It is time.

 

sounds gtg for Aaron.