Just done with my setup. GSR w/drag turbo kit. S-afc with Dsm 450cc injectors.
I set -40% across the RPM band 1000-8000. Idle is super lean...from the reading of the "Sensor check" thinging. And while driving...it goes way up to 5.*** instead of .95 or .85 as Liam had mentioned. What could be wrong with my setup? Stock timing...Help is appreciated.


[Modified by cinq, 9:42 PM 10/13/2002]

 

ttt

 

What is your throttle point set to?

 

have you checked here?

http://www.thedropshop.tv/vafc.htm

make sure your settings are correct

 

TH point ....i tried both...71%/72%...and 98%/99%

 

I tried that sites setup and it did not work out very well for me.

Now I am using 440 injectors.

I have my throttle points set at 0 and 40

I run 15psi and it works out great high throttle set to -35%
and low throttle I set 1000rpm -15% and 2000rpm to -20%
and the rest to- 25%
I dont know but it works well for me

 

you run 15 psi on the hack?


Rob

 

What the hell? you don't throw a CEL code for running -15% and -20% even???? How is that possible.... Whats your make/model, and FULL fuel and engine setup?

 

You have to run a smaller percentage cut in fuel at low RPM to account for the longer opening time of larger injectors, Hondata recommends adding back fuel to their maps after you apply the injector size multiplier. THey add back 20,19,18,17,16,12,9,8,8 percent to the first nine columns in their maps. ALthough these apply to constant pressure columns not constant RPM rows in the ECU maps. I personally run a -20% cut at idle and -35% cut at WOT. But I'm using a pressure compensated MAP adjustment circuit not RPM compensated like the AFC.

Also, since it's damn near impossible to boost with a turbo at 1 or 2K a -15% MAP cut won't make you throw a CEL down there. As long as your cut is -35% or so at higher RPM you can use a small cut at low RPM to smooth out idle.


[Modified by filetofit, 8:29 AM 10/14/2002]

 

That makes alot of sense. I think I will try that to smooth out the idle a bit.

 

I am sorry that is top sceret info.

Thank you come again

 

that sensor check (ie blue wire mod) is for reading the o2 voltage. Have you done the blue wire mod? Are you sure your not reading your MAP voltage?

liam

 

Yulp...I'm pretty sure I hooked up right. I have the A/F gauge too. When the Ln 2 reading displaying .85...the A/F gauge shows Rich....after driving around for awhile...the reading would go all the way up to max... 5.112 . It's like 5x richer than super rich? I don't know what to make of it Liam.

 

Liam, with the sensor type....do you set it to 6 for input and 6 for output?
I read in the manual that hondas are sensor type PR6 for Pressure and 6 for the number, but I'm not sure how to set it....with the Default at 01 for input and 01 for output.

 

all honda's should have their pressure in/out at 6 and 6

 

I just did that...the sensor check reading still show 5.115 after a little boosting.
Gas prices is pretty high here in the eastcoast...$1.55 for 93 Octane.

 

yea it is, some places down here is a little more than that for 93 octane it sux

 

Yea I fill up on 94 octane 90% of the time and it costs $1.67 a gallon..... but its worth it, I get noticably more gas mileage with 94 then 93.... its strange.

 

where do you guys live I pay $1.80 for 93 and we dont even have 94 that I have ever seen in nova

 

ummmmm you cant use the blue wire for the o2 on the V-AFC ONLY ON THE S-AFC!!!!!! thats why you are reading sooo high!! and here on the west coast iin the bay area over $2.00 a gallon for 91 octane thats supreme!!!!!

 

I don't have the V-afc....I'm using the S-afc. and you are paying too much for your gas!!!

 

That I dont know mate...but This setup is for a OBD1 GSR engine.

 

Stock o2 sensor is from 0-1 volt i believe, minus the wideband one on the old vx. Hurry up and get boosted rich! I will join you real soon

 

lucky!!! I paid $1.92 for 91 octane earlier today! I needed gas normally its $1.80 something for 91.

liam

 

Ya know...mine does weird stuff too. I stopped caring what my o2 voltage says because i dont trust it. The stock o2 sensor is lame. An EGT or a wideband O2 is the only way to go.

Me personally..i tuned with my egt and my butt dyno. I use my a/f gauge so i know my o2 sensor is working at all...haha The a/f is nice cuz it gives you an idea of what is going on (ie lean, mid, and rich).

Something you might want to try is replacing your o2 sensor..or barrowing a friends. When my gf broke my last o2 sensor (we donno how but she dented it in 1/2 driving around..must have been a rock or something) i replaced it with a new one. It really did make a big difference..the car runs alot better now. Something to try.

liam