sir revalot

Excuse my ignorance, how can a lack of a BAC cause it to run rich? Any air bypassed by the BAC will be read by the AFM. So more air, more fuel.. No?

Running rich, to me, would indicate either blocked fuel return, jammed shut FPR, coolant temp sensor out of range, a bad AFM, or leaky injectors... A bad O2 sensor will also cause a rich idle.

87nitefc

So I don't need a bac is that wat ur telling me

satch

iTrader: (1)

You have a turbo. If you had an NA then the idle adjust screw would be located on top of the engine. On a turbo there is no screw on the top of the engine. On the turbo the adjust screw is located at the BAC. If you don't want an air adjust screw then don't install a BAC. The BAC is used to help maintain a proper idle and it's there for a purpose so without the BAC you lose the air adjust screw and a method for maintaining a proper idle.

87nitefc

Is it possible to interchange Tb from Na to turbo just for the adjustment screw

barkz

iTrader: (1)

dude, STOP, ill sell you my BAC...
or buy one of these http://www.ebay.com/sch/i.html?_odkw...valve&_sacat=0

sir revalot

Yeah, get a BAC if you don't have one.

I just wasn't sure how a lack of one could make it run rich.. Just poor or no idle..

sir revalot

Are you sure it has a standard ecu?

Often the BAC is left off when changing to a Microtech or other basic aftermarket computers.

87nitefc

Yeah stock ecu currently

satch

iTrader: (1)

You also have the variable resistor to help adjust the fuel mixture for idling only. The engine should be completely warmed up before making this adjustment. The adjustment screw is located near the boost sensor on a diamond shaped piece of metal.

87nitefc

This should help me lean my engine out

satch

iTrader: (1)

To a small degree. Usually the resistor is set to more rich than lean. The screw does not rotate too much. Pretty much from 8:00 o'clock to 4:00 o'clock. If you try to turn it pass these resistance points you'll break it.

87nitefc

So today I took my car to work seemed good I had a jumpy 1,500 rpm then when I had gotten out she starts but is idleing low compared to before now she was at 650 I gave a Lil gas and she died out I did notice my volt gauge is going nuts really unsteady I also notice my right signal light on my dash flickers for a few sec I'm not sure how good is this info but I'm guessing there has to be a short somewhere based on how my gauge is acting up I'm also getting huge amount of smoke any input about this

satch

iTrader: (1)

The output wire of the alternator should read 14 volts while idling/driving (belt might be slipping).

As stated before, the BAC helps to keep a steady idle at 750 rpm and prevents the idle from dropping down below 750!!!!!!!!!!!!!!!!!!

87nitefc

OK I got a bac where can I find a hose diagram for it.
Im planning to install a safc or AFC neo does it help with tuning

satch

iTrader: (1)

The service manual. And if you have a stock setup I'm not sure aftermarket devices are of much help but I could be mistaken.

87nitefc

So this is where I'm at belt was a Lil loose so this is after I had tighten the belts

satch

iTrader: (1)

Again, the BAC is there to help the idle from dropping below 750 rpm. Did you measure the output of the alternator or not. If you did what was it? If the voltage drops so will the engine speed.

87nitefc

Based on the pic of the bac on which side does the b/w wire connect to



Got it its the L/G_B/W