I have read that if u have the car at normal operating temp. and u turn the idle adjustment screw ontop the intake all the was clockwise untill u cant turn it anymore and if the engine dosent stall that u have a vac leak somewhere right, i mean in simpler words if u turn it all the way clockwise and the car dosent stall, that means u have a vac leak,

Please help, and yes ive already searched.

 

Well, since turning it CCW increases your idle speed (with the initial set coupler jumpered), that might make sense...Just make sure your coupler is jumpered, or the BAC will take over and keep your idle alive no matter how far you turn the idle adjust screw...

Just read that you've got an S5- I don't know how you guys bypass the BAC- shorting it to ground, or something like that...

 

thats what im talking about it dosent have that plug on the drivers side

 

can i just unplug the bac and clockwise decreases the idle

 

IIRC, you S5 guys have a single pin yellow plug that you short to ground for the initial set...If I'm wrong I'm sure I'll hear about it, lol....

I guess just unplugging the BAC would accomplish the same...

 

Ok yeah i unpluged the electical plug on the Bac and turned the screw on the intake all the way clockwise and the car still didnt stall,,, any more ideas i read this on this page http://www.geocities.com/huguesdc1/faqidle.html

 

Any S5 guys out there

 

Any one

 

please

 

Ok you cant tell me that no one has read that article before........

 

I don't think any of the S5's have it?
So if you have an S5, why are you asking about it?


-Ted

 

What im asking is if the car not stalling while idle screw all the way in is a good indicator or a vac leak???????

 

my car stalls........how do I set the idle screw to the right spot? My idle is high for the first 10 minutes(2K RPM) and then low afterwards(100-200 RPMS)......my timing is way off too.....I set the CAS to the right setting(FSM) and it never idles right......

 

ok
i just want to know if i have a vac leak or not the page is right there to show you what im talking about

 

Oops, ignore my replies.
For some reason I thought you were asking about the idle mixture adjust screw.



-Ted

 

RX7boy- hell, why don't you just block off the damn intake pipe forward of the AFM? You're trying to accomplish the same thing by completely closing the throttle passages...

madrx7- I had that problem, too, with the fresh rebuild- the CAS had to be off a little (maybe 5*) for a smooth idle, then as she broke in a little I slowly tweaked it back to the timing marks. Even now, she runs better about 2* advanced than she does with the marks exactly dead nuts...Experiment with different CAS settings, just don't get her too far off. It makes more sense to have the engine idle & run smooth with the CAS a little off, than to doggedly adjust it to the marks and make her run rough all the time...Of course, you may have other problems too...

 

no i just read that if u screw the idle adjustment screw all the way in and the car dosent stall then u have a vac leak is that so hard to understand...dang

 

No, I understand perfectly what you're trying to accomplish, just don't agree with the manner in which you are trying to do it...

There are several alternative methods for finding vac leaks that don't involve making adjustments to systems that, if running properly, shouldn't be messed with.

Have you tried to pressurize the intake system yet? I've read of several guys that went that route and found their leaks...And I would imagine that blocking off the intake (or most of it, you don't want to kill her) forward of the AFM while idling would get any vac leak to start making some noise...

 

how do u pressurize the system

and yes i do understand u

 

I've read a couple of threads on it in the last couple of months- see if a search pulls anything up, but it's fairly straightforward- use compressed air to pressurize the system from an easily adaptable location, then listen for the leaks. Engine doesn't have to be running, so no background noise to throw you off...

 

sounds easy enought
thanx

 

thanks I'll keep working on it.