so i just bought my evo. ran great for the first hour on the drive home and then it started to run ****ty. when pedal is pushed to the floor she starts to sputter anywhere from 4-8k rpms in all gears. its as if there is a lack of gas and its running lean. if i feather the gas it will boost up and make it thru all gears fine. but i cant get into her fully. not even close. i replaced my coil packs, plugs, wires. and installed a walbro 255. what else do i look for/ check?

mods..
race valves
full 3 inch cat back exhaust(megan)
bigger turbo piping(megan)
intake
aftermarket b.o.v.... old one seized up.
headers (megan)
boost gauge
had a boost controller that was set at 22psi. but was taken off and is not at 16psi.
strict dyno tune of 93 octane. (aggresive tune)
had tune run 91 on way back, but has had 93 in her for 2 weeks.(i live in iowa n we might have ****ty gas, so i will try some 100 octane so we can see if it may just be the agressive tune)
dude i bought it from showed me slips. made 380hp and ran an 11.56 in the 1/4


if there are any suggestions pla help, thanks

 

sounds like you bought a turd or dont know what your getting into

 

how about taking it to a tuner.
if you do not have one in ur area maybe a shop to just check it out.
maybe log your car and do mail tuning with one of the vendors on here such as mellon tuning.
it may be a fuel issue or it may be something internal..im unsure but it's my .02

 

that really doesnt help, im on here to learn. not get critized

 

ya there arent many around, i know a guy who can tune, but has an hp tuner and nothing to tune an import with. any suggestions?

 

Did you check the hoses? I've seen the vacuum hose for the fpr come off a lot.

 

get the equipment on my website and log the car...send me the current rom/log and I'll be happy to look over the current tune for you to see what's going on. It would at least rule the tune being the culprit out and I might be able to identify the problem.

 

check your plugs again. I bought some NGKs from Oreilys one time and they ended up being the wrong plugs in the box!

 

got new plugs ordered, we think maybe its running to rich, cause to lean it would normally popa code correct?