86 Gn sputter/buck once warmed up

[jj86gn]

Can anybody tell me why once my 86 GN is warmed up it begins to sputter and buck. I can prevent it from dowing this by tach the rpms up.

The only mods on the car are 3" downpipe and exhaust (No cats), Flowmasters, larger turbo, and chip with dial to control the tans shift points.


I did a total tune up using AC Delco parts (except the wires (NAPA)

Any information and help would be great.



P.S. Great site

 

[WarpSpeed]

Did you change the O2 sensor too(AC Delco?) Could be a bad MAF sensor. Do you have scan tool numbers?