papabeardoe

Ok so when im cruising around 3500rpms the cars starts sputtering until i push the clutch in and let it out. When its sputtering the AFRs go all the way lean. I just dont know whats going on ive changed the plugs.

C130flyer

iTrader: (8)

are you on SD? if so your map sensor is bad

papabeardoe

No im not on sd.

4G63_EVO

iTrader: (4)

Do a boost leak test

Project_Broke

iTrader: (2)

this

ZOMGWRX

Interesting...I had this happen to me and it turned out to be my coils were bad. I got some Spoolinup COP and haven't had that issue since. But I'd do a boost leak test like mentioned and I believe the IX's sputter every so often around 3k rpms especially in a higher gear going uphill.

papabeardoe

Did one before and fixed a few small leaks. Just installed a spoolin up cop this past weekend and its still sputtering. I'll do another boost leak test.

Project_Broke

iTrader: (2)

Bad fuel? Did you fill up recently? Possibly clogged injector.

mines5

I experienced a similar situation , as soon as the car comes out of vacuum around 3-4k rpm it wud sputter badly. Checked everything , finally checked the injectors and wolla found the culprit. Changed to stock injectors for testing and all was good.

papabeardoe

The car is daily driven

Project_Broke

iTrader: (2)

Alright, well your symptoms indicate lack of fuel during this period so throwing ideas out.

What kind of FP? Maybe it's starting to go. Possibly the MAF. Have you tried cleaning/swapping it? Could also be a tear between the MAF and turbo you may not use during a leak test.