ok so here it is,,, got alot of theorys but being the pos aem has no check engine codes it could be anything so im taking suggestion ,,here it goes, h22 turbo with aem v94 version everything ran fine for a long time no probs at all but the other day i ran a little low on fuel(1/4 tank but i got a sump in my gas tank and external aeromotive system)not sure if this is coincedese or what but the car started sputerring through out the whole rpm rang and at idle it is shitty and when i get on it will still boost up fast but it pops kinda like detonation(not sure if it is ) i thought time for plugs so i took out my ngk bcpr7es-11 and swap a new set in gaped at 30 same as my old ones (they work great before) nothig did same **** could be o2 sensor could be injector cleaning , maybe the temp outside is just to hot (had it tuned when it was a little cooler out )my fuel pres is all good and it is presure gauged at the fuel rail so the filter shouldnt be cloged vacum is at 19 PSI,also did a compresion test and it is 180 across the board so on and so forth GIVE ME YOUR SUGGESTIONS THANX

 

Fuel filter? Check your fuel pressure.

 

fuel presure solid

 

do you have the knock sensor hooked up?? try loging knock raw and o2. see what happens in the log when you get the sputtering, i ASSuming you have a wideband in the car, other wise the o2 reading the ems is getting is junk.

 

knock is hooked up,,i am not running as wide band but i will be pick 1 up this week

 

im gona assume you know how to do the pc loging.... log afr and knock, timing, load, and tps... when you get the sputtering go back and look over the log... or save it and send it to me...

 

actually i have some one else tune the car im thinking maybe my o2 sensor is shot im planning on a wide band

 

using the stock o2 sensor w/the ems is useless. im going to guess that o2 feedback is not enabled. if it is then your car isnt gona run right because you have to enter the calibration for the stock sensor... waste of time.....