BBK TB and IAC count
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TECH Apprentice
Joined: Jan 2002
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From: Princeton, IN
BBK TB and IAC count I installed my BBK TB a week ago, the idle seems to be fine "idle is around 600 in drive" "650 to 700 in Park" I logged the IAC today and the count is 0...
Should I close the blade all the way and let the computer have control over the idle? Another note… the throttle position is .4 at idle… my stock TB was 0%
<small>[ September 26, 2002, 09:35 PM: Message edited by: dissonance ]</small>
Should I close the blade all the way and let the computer have control over the idle? Another note… the throttle position is .4 at idle… my stock TB was 0%
<small>[ September 26, 2002, 09:35 PM: Message edited by: dissonance ]</small>
Thread Starter
TECH Apprentice
Joined: Jan 2002
Posts: 364
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From: Princeton, IN
Re: BBK TB and IAC count I have seen it drop to 0% every once in awhile but 9/10 it's at .4; the bbk does not have a hole in the blade for the idle. So I think it needs to be slightly open…
I have read a few post about IAC but most guys have to adjust it because of an aftermarket cam… but most of them seemed concerned if the count was 0
<small>[ September 26, 2002, 09:36 PM: Message edited by: dissonance ]</small>
I have read a few post about IAC but most guys have to adjust it because of an aftermarket cam… but most of them seemed concerned if the count was 0
<small>[ September 26, 2002, 09:36 PM: Message edited by: dissonance ]</small>
Thread Starter
TECH Apprentice
Joined: Jan 2002
Posts: 364
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From: Princeton, IN
Re: BBK TB and IAC count Yeah, I like it
I have fast toys ram air and a very well sealed air box.
On cold starts it sounds like i have a blower on the car "wish full thinking" <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
A lot of guys trash the BBK, I have had the blade stick a few times... the 1st day I put it on...
I’m sure it does not make anymore power if any at all. I do think that it makes more power at part throttle thou.
<small>[ September 25, 2002, 10:35 PM: Message edited by: dissonance ]</small>
I have fast toys ram air and a very well sealed air box.
On cold starts it sounds like i have a blower on the car "wish full thinking" <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
A lot of guys trash the BBK, I have had the blade stick a few times... the 1st day I put it on...
I’m sure it does not make anymore power if any at all. I do think that it makes more power at part throttle thou.
<small>[ September 25, 2002, 10:35 PM: Message edited by: dissonance ]</small>
Thread Starter
TECH Apprentice
Joined: Jan 2002
Posts: 364
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From: Princeton, IN
Re: BBK TB and IAC count Any ideas about the IAC count being zero with the BBK? I was going to try to lower the idle and see if the IAC will take over the idle… I was worried about the blade sticking though
Re: BBK TB and IAC count You want the TPS to read 0%, so closing the valve slightly will take care of that. If you IAC count is 0, you get a slow return to idle when you take your foot off the gas, or a cruise control effect for a few seconds when you are driving. That is because the PCM sends extra IAC counts for a few seconds each time the throttle is closed. I have observed over 100 extra counts, diminishing back to the typical 30-40 required for normal idle in a 2002 A4.
Your idle speed will probably drop to 500 rpm (which is the stock speed programmed into the PCM for A4's) before you will get any IAC counts. Of course this all changes if you have reprogrammed the PCM for a faster idle speed. M6 cars on the other hand will see IAC counts if there is not enough air flowing past the plate to maintain an 800+ rpm idle.
Your idle speed will probably drop to 500 rpm (which is the stock speed programmed into the PCM for A4's) before you will get any IAC counts. Of course this all changes if you have reprogrammed the PCM for a faster idle speed. M6 cars on the other hand will see IAC counts if there is not enough air flowing past the plate to maintain an 800+ rpm idle.
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Re: BBK TB and IAC count As long as the idle is OK and you dont get an SES light from too fast of an idle or the plate being patially open, and you dont have the "cruise control" effect LEAVE IT ALONE!!!
By the way, DONT drill a hole in your plate in this case. It would only reduce your already too low IAC count.
By the way, DONT drill a hole in your plate in this case. It would only reduce your already too low IAC count.
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TECH Apprentice
Joined: Jan 2002
Posts: 364
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From: Princeton, IN
Re: BBK TB and IAC count i will try to close the blade alittle, i have marked where it's at right, so if i have problems i will turn it back.
it takes the idle 3 sec's or less to come back down...
i just want to get some control over my idle
thanks for the help
it takes the idle 3 sec's or less to come back down...
i just want to get some control over my idle
thanks for the help
