LSJ tuning need help...idc doubles in blink of an eye

[djt81185]

I pmed keith 2 weeks ago asking for insight and still have nothing...anyone...please?

[fast98]

replace your maf sensor. i bet in sd the idc is fine. my brothers cobalt does the same thing and its supercharged, its just winter and he doesnt drive it now so i havent replaced the sensor yet. but check if the idc is fine in sd, if it is replace that maf sensor

[djt81185]

Im going to go to a ls2 maf since im running out of frequency as it is. Just this injector issues is killing me

[fullthrottle]

Im going to go to a ls2 maf since im running out of frequency as it is. Just this injector issues is killing me

I have one from a 6.0 chevy pickup that I want to incorperate into mysetup. its probably \quite possible that your IDC is directly related to your current MAF sensor Eh?

[LiteItUpSS]

Ive tried every tuning trick I know of to get rid of that injector spike. Now another cobalt that is turboed is having the same issue and we each designed our own tunes. Lastly a cobalt that is still supercharged is starting to see the same issue. I think its somewhere in the hardware but I have no idea. Wish Bill or one of them would jump in here.

are you speaking of another 2.0? or a 2.4?

[lsjwannabe]

he is talking about my 2.0 ss

[LiteItUpSS]

he is talking about my 2.0 ss

o ok

[black06g85]

this is an older picture of the setup in my car, fixed the piping issues on the cold side, but still same problem when running all 3" no change in behavior.

[black06g85]

and btw maf isn't going to matter, we are hardcoded to 11111 Hz anyway, stock maf is good to 13k HZ
here's some more screen shots for the hell of it

[Bill@HPTuners]

Black06 can you please post the .hpt & cooresponding scanner logs as screenshots really don't help much at all in this case.

[black06g85]

I know, just posting the idea so I remember when I get home from work. (no wireless out here in Harlem for the laptop) They will be up the second I get back though.
I got tunes and logs from pretty much everystep of the way, I finally got it to hold a somewhat steady afr now, but it's not happy.

[Witt]

Issue happens on supercharger swapped LSJs as well at the same manifold pressure.

[black06g85]

here is the latest tune and log I'm running right now, have the boost backed off a bit for tuning purposes.... but you get the idea

[black06g85]

well somehow got the car to hold a steady afr for once... goes a bit rich up top, but I gotta adjust the PE table now that it's holding. Only running 18psi though for now for tuning purposes..
oh yeah and the stock motor took a 30psi pull the other night like a champ... stupid wastegate line burst. and I swear it blew up by the way it started running (wrx like lol) but after continuing on for about a minute (I was on the triborough bridge) it was fine again like nothing happened.