New Vitara Build N/A sputtering and breaking up ..
 

I just got my vitara build and I am running NA

have a big problem tho...

The car runs fine when its cold, when the car warms up it starts to "sputter" really bad... it will do this for a bit and then it gets really bad the car will stall out.. This happens under most between 1500 and 3kish... RPM

any ideas???

its fully rebuilt bottom end, vitara and h beam rods... low comp..
stock fuel pump, stock injectors, chipped ECU with ECtune...
Distributor looks good, its fairly new..

What computer is it running off? Is timing set right?

why did you build a low comp N/A motor?

to boost it

If I'm not mistaken those pistons make a d16bottom in the 7-?-? Comp, run hotter plugs and play with timing sounds like the motor is flouding out! I bet it a pain to start up like the starter is bad or battery is dead..

Try running the d16 head from the obd2 cars that bumps the comp into the higher 7-?-? (I can never remomber d-series stuff, y8 z6?)

Use d16 pistons out the flip up light integras!! Like d-series type R comp! Or the twin cam ZC motor ( I think it's d16 a1,a6, or a8) I know one of those is an si crx code

go back to the guy who tuned it

Is the turbo even on the car? Did you tune it?

im curious about this issue, my brother has pretty much the same setup vitara pistons eagle hbeam rod block guard head studs rod bolts stock head skunk2 stg2 cams valve springs retainers dynoed 267hp 205trq at 7200rpms fun lil car no track times yet tuned with hondata s300

it has hella trouble on start up like it doesnt want to crank, sounds like it cranks really slow, runs damn good after it fires up