Finally got a vafc (used), got it installed, did the settings, crank up the car and get the SES. Pulled the maf code. When I give it a little gas it almost shuts off. I did the install so if I needed to remove the vafc I have a male and female spade terminal to connect back the maf wire. When I connect the maf wire, it idles and runs fine, with vafc intercept it is rough. Any ideas?

Bad unit maybe?

 

How did you connect it to the MAF wire, and what settings do you have it on?

 

it seems to me like too many people are having V-AFC2 wiring issues, somebody should really do something about this..

 

Sorry I never got around to replying to your pm. By the time I got around to reply it was about a week later so I figured you already found out how to do it. Did you get it installed ok?

 

You mean like wire them correctly? I haven't ever had a problem.

 

I just have the regular vafc, I got it used so I'm thinking the unit is just shot. I'm going to tinker with it one more time before I give up on it and just use it as a gauge

 

i would like if someone said how they setup the inital settings. i also hear the wiring is different than the safc-ii. thats why my vafc-ii is still not installed....

 

some one needs to make a write up on this install with pics

 

I never had any issues with wiring up my VAFC.

-Nick

 

I heard the only different wire is the KNOCK SENSOR PIN 71 purple....this one doesn't have to be wired up...umm..but everything else matches...correct me if i am wrong

 

I've got the regular VAFC also, no probs here. Lemme know if you need help/ideas.

 

I am starting to hook up the VAFC 1 to my 96 maximaand was wondering if I could use the vtec controller. if so, which wires corispond to VTM and the Vtec input and output. Thanks

 

Nice 3 year old thread bump.

You want to use the VTEC controller for what, exactly? You are aware that you don't have VTEC, correct?

 

You are not able to use the Vtec option on your car. I'm not too sure, but I think the only way to use it on a Maximma is if you have a 00VI... again, not sure. It was mentioned that it could posssibly be used on the VIAS from 02+, but thats not true cuz the VIAS needs to close at a specific rpm range, and then re-open at another rpm point.... VTec controller enables the solenoid to remain open until the rpms drop back to the set point.

 

I'm aware that there is no Vtec. I want to use it to control my maf and the injector duty cycle. I'm currently running a t3/t4 on a stock block and stock ecu management. I'm restricted to about 7psi. I want to increase boost and at the same time keep the correct air/fuel ratio. Is it possible keeping the stock injectors and maf unit? I 'm assuming that the stock injectors and maf will be static at some point. I want to hit 400whp. I'm short about 60hp.

 

Well you can't control the DC directly, but indirectly through altering MAF voltage. IMO using a VAFC to tune a boosted car ==

No reason to hook up the VTEC wire on the VAFC to use on your car.

So you're running 340whp completely untuned, stock MAF, stock injectors? Do you at least have an FMU/AFPR, fuel pump, any other supporting mods?

You must be running a crazy high fuel pressure to be making that sort of power with stock injectors.

This is a much better topic for FI, not AM. Search around, you'll see pretty much any question you could ever ask related to the fuel system already anwered there.