OK guys im have a problem with my car. Its an 03 evo 8. when wot the car runs lean and breaks up. Ive tried a new maf and that didn't do the trick. I put new plugs also. Also the guy who owned the car before me did the fuel pump himself and when he did it he broke four of the studs that hold that fuel pump and is not sealed would that have something to do with it?the car has got some stuff done to it.

tbe
hks intake
10.5 hotside
dnp manifold
dnp 02
walbro 255
fuel pressue regulator

 

If it is consistantly lean I would stop doing WOT pulls to start off. Get yourself a wideband that can log, a tactrix cable and Evoscan. Richen up the maps a little bit where needed. Unless you are saying that the lean condition has started because of a mod you recently put on. Then you need to find the cause of the problem directly.

I would drill and tap those studs out for the fuel pump. Make sure you have it secured in there, don't want anything falling into the tank or fumes escaping...

 

unhook ur battery for an hr to reset ur setting.That what I do when I start having ruff idle.

 

Seems like the car isn't getting enough fuel, I would believe their is something wrong with your fuel pump or fueling. Especially if it is running lean. Do you have a wideband o2?

It doesn't seem like a problem that can be solved with a boost leak test.

 

I have a wideband forgot to put that up. i don't do any wot puls i bought the car the way it is the guy i bought it of said it needed a tune and me and a buddy of mine looked at it and we put a base map in and its doing the samething.ill try to richen it up. whats the best way to fix the tank should i just get a new one? I dont want to do anything and have something spark.

Tried doing that also

 

also did a boost leak test to it.

 

+1 for richen up the tune, if not it's probably something wrong with your fueling

 

so i tried to ritchen up the tune that didn't help. I also put in a new fpr,wires,plugs,coils that didn't help.I got a code now its p0243 wastegate selonoid, would this be making it run lean i am running a mbc and the stock selonoid is not plugged in?

 

im having the exact same problem with my car similar mods.

 

stock solenoid should still be plugged in
not saying thats your problem... but it will be for a po243 code

 

Bump anyone have any idea what this could be?I'm thinking of getting a new fuel pump see if that makes a difference.

 

If you haven't already I would fix the fuel pump studs