i just installed my safc, and now i get a major hesitation that works through it self when ever im in low gear at around 3k just at around 1 pound of boost. the safc isnt really tuned well yet.

but could the vacuum lines be collapsing on them selves? there brand new.

and is it possible there could be a ground problem?

steven

 

ahh crap 2x post sorry

 

i dont see how there could be any vaccumw under boost just my thoughts

 

oh.....well then. what ever it is. when i press the gas gradualy its not so bad but the the car falls flat on its face when i press it down faster at aroun 2500-3000 rpm

 

sounds like the secondaries groung the **** out of the motor.
was the problem the same befor you installed the safc

 

no. besisdes the secondaries dont kick in till 3.8k. you know of any grounds that the ecu are hooked up to? maybe i forgot to hook one back up or something

what do you think

 

Your question doesnt make sense since boost is positive pressure and vacuum is sucking. If anything check to make sure all the settings on the safc are correct (correct flapper, correct in/outs/ 4cylinder in diagonal up right position).

 

i have the safc gen 1.

is there something i could f**k up on the back?

 

im just really frusterated cuz it wasnt having this hesitation before the hook up.

however a while back i had a hesitation problem, that was due to the tps.

Q-does the tps do anything when the turbo starts to spool?(around 1/3-1/2 trottle)

 

bump

 

I didn't think the SAFC 1st gens worked well on our cars? Remove the unit and see how it goes.

 

ok which wires do i bridge again? i forget

 

nvm i found them

 

ok so ill remove it and nothing should be wrong int theory right?

if there is i hooked it up wrong (such as grounding wire or something)

what do you all think?

 

There is nothing wrong with 1st gen Apexi S-AFC. When I had a compressor upgrade/ 720cc second., it responded very well on the dyno and Lambda.

 

i still just cant think of why it would happen. much less under boost

what do you think?

 

unless its groundss............

 

If it causes problem after the install, obviously the installation is wrong or the unit is defective if that is the only thing you touched. Did you use the right setting on the back?
There are 2 settings. 1 is a dial (I think 5 is FC) and the other is several switches for different ECUs.

TPS= throttle position sensor
It has nothing to do with boost. It just makes random hesitations if it's not adjusted.

 

ok well i know that it is something wrong with the safc because i took it out and bridged the terminals. no hesitation. ill try switching the dial to 5 i think i have it on 4. boosted, would you by any chance know what the dip switch settings are for a s4?

 

I have to look it up and don't quote me on the "5". I'll send you all the settings when I get home. I have it written down on the manual. You'll probably see it late since I'm in Hawaii but you'll get it by tomorrow.

 

no problem

 

Ok.. for the S4 AFC settings:

dial #5
switches #1 - 8 = D U D D D U D U (u= up, d= down)
I hope that works for you.

 

thank you so much !!!!!