pjonkheer

Hey Guys,

My tuner and I installed and setup my new VAFC last night and started to play with the settings. However, something is quite wrong with it. As soon as VTEC engages, my HP rating does down by a good 75% on the dyno. Before VTEC, everything is just fine. If he adds fuel etc. after VTEC, it goes down off the chart... Has this happened to anyone else before? I have a comptech SC, toda header, and comptech exhaust...

PS - My stock HP rating without the VAFC was 290 and 180 torque. It was about 80 degrees with moderate humidity and the engine was rather hot since I had just drove it for 40 minutes to get to the shop.

Thanks,

PJ


For Sale: Nearly brand new Comptech CAI. (500 miles)

ultimate lurker

If you're trying to add fuel with the VAFC you're going to make the ECU think its seeing boost. This will cause a dramatic drop in power. Do not add fuel with the VAFC.

Also, be sure your ESM is wired up properly.

UL

pjonkheer

Ok.

If I don't add fuel with the VAFC, what benefit can I get out of it?

Thanks,

PJ

3ngin33r1

Check your wiring and flatline the settings and try it.

pjonkheer

If I zero all the settings, it works fine. However, I might as well turn it off then right?

3ngin33r1

Have you checked your wiring? What settings are you zeroing? the fuel curve? What are your settings, please post them and I can help you out.

pjonkheer

To be honest, I don't know what the settings are. My tuner was doing everything... I'm not too familiar this kind of part...

Basically, he said adding fuel after VTEC was causing the power loss.

Is there a standard on what settings to use??

Thanks,

PJ

3ngin33r1

Every engine is different so there is no "standard" for the settings and you should never guess, always use a WBO2, there is a settings library thread as well, but putting the VAFC into a + range I haven't seen work too well, I hit a -11 on some of them after VTEC. Sounds like your tuner doesn't know what he's doing, be careful.

pjonkheer

Great.

I'm just gunna sell it then. I don't have time and money to be wasting on this thing.

My tuner says he has installed many VAFCs before and the way mine was acting is the first time he's seen anything like it. Oh well, I thought I could really benefit from one after seeing some of the dyno charts of others with FI.

Thanks for your help...

PJ

3ngin33r1

I wouldn't just give up on it that fast. Your tuner may have done several of them but the S2000 ECU is a bit different than others.

If you want to get rid of it that's your choice but I'm more than willing to help you get it set up.