crxfreak88

I had the same problem. turns out i was running lean. What kind of fuel management are you using?

NismoMan2

Im running a vortech 12:1 fmu, and im using a hf manifold with an adaptor plate, it sounds like i have an exhaust leak but im not sure. oh im thinking it could be some bad spark plugs wich i will be changing tomorrow, because it will boost just fine when the car is cold, but the sputtering is only when it warms up. im also going to take out the turbo tomorrow and check all the bolts, make sure everything is tight, ill get back with yall tomorrow on how the problems going

Semnos

try some colder plugs

crxfreak88

I had the same problem with the fmu. I got the 450's and the hack no problems since. Good luck.

88crxSi

also... do your motor a favour and don't boost when it's cold!!

NismoMan2

Sorry i only boost when its cold cause its the only time i get to lol

G2turbo_terror

The ecu advances the timing when your engine is still in warm up, that is why you should not be boosting. did you do a tune up before you started all this?

SeQuence

just buy a product called missing link, the check valves dont always work i've put 5 on my turbo didnt work, and then just orderd a part called missing link off of ebay. worked great. but if its not spooling check the ic piping you might have a leak it happend to me aswell.

NismoMan2

Ive got most of the bugs worked out of this setup so far, the problem with the sputtering at top end was the timing, it was off i guess. the problem with the horrible lag was the wastegate wasnt shut all the way, the only problem im having now is the check valves, im going to read up on the missing link and thats probably going to be the next add on to the project, i appreciate the help guys. -Ben

J-MAN

i have a missing link for sale in the classifieds.