ExVtec

I have my turbo on and running. Must say....Grrrreat. While I am driving the transition from vacuum to boost is like a factory turbo car. Power delievery is smooth. The idle on the other hand is rough. It idles between 8-900 rpm's, which is fine, but it runs like its on three cylinders . We adjust the 1k @ -40% which ran really rough, then bumped it down to -30% which seemed to make it quit stuttering but I thought that was rather low.... To my understanding, doesn't that mean that it is allowing more fuel @ idle?? Anyway any help would be greatly appreciated.

Thanks all in advance.

99blusi

When I was running 450's I had my idle set to like 38...seemed to take care of it most of the time. Just play around with it a little bit and see what you can come up with.

Bailhatch

big injectors react slower so you may need a fuel setting that is more rich to get the right ammount of fuel. I have set up several cars w/ the hack and the the idle setting has been between -18 and -35 on all of them. You kinda have to drown it in fuel to get it to smooth out sometimes.

<look at how gay our blue cars look...

ExVtec

Thats good to know. If I get this idle problem squared away, I will be pretty impressed with the hack....(fingers crossed)..lol.

Thanks guys for the quick response.

boostincoupe

Back from the dead for a quick question:

would raising the idle speed remedy the rough idle issue?

numba1

just set your hack at -35% to-38% down low 1000,2000 rpm should smooth it out. i had mine set at that with vafc hack and 750cc inj. and it idled perfect.oh yeah fuel press.of the rail was at 51lbs. i think thats it.

numba1

sorry didn't read all the way to the end of the post. but to answer your last question, it might make it idle smoother but at a higher rpm. Try and check the plugs if there fould out or not, maybe just replace them. turbo cars go through sparkplugs quick.

boostincoupe

Not a problem. Thanks for the answer.

Edgemingsr

what kind of injectors are they? maybe you need a resistor box or inline resistors