BAC and cold start/flooding?
#1
Full Member
Thread Starter
Join Date: Jul 2009
Location: Silicon Valley
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
BAC and cold start/flooding?
I wondering if disconnecting the electrical connector from the BAC would cause problems starting my car in the mornings that result in or look like flooding. After getting the car started and running, it starts fine through out the day.
The reason I disconnected the electrical to the BAC was because it's a bit dysfunctional and causes intermittent changes in idle speed usually when the car is not warmed up.
Thanks.
The reason I disconnected the electrical to the BAC was because it's a bit dysfunctional and causes intermittent changes in idle speed usually when the car is not warmed up.
Thanks.
#2
Moderator
iTrader: (1)
I wondering if disconnecting the electrical connector from the BAC would cause problems starting my car in the mornings that result in or look like flooding. After getting the car started and running, it starts fine through out the day.
The reason I disconnected the electrical to the BAC was because it's a bit dysfunctional and causes intermittent changes in idle speed usually when the car is not warmed up.
Thanks.
The reason I disconnected the electrical to the BAC was because it's a bit dysfunctional and causes intermittent changes in idle speed usually when the car is not warmed up.
Thanks.
#3
Full Member
Thread Starter
Join Date: Jul 2009
Location: Silicon Valley
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
Second question is about the BAC adjustment screw at it's front. If it's turned fully inward into the BAC what does that do as opposed to fully turned out?
I know my idle will decrease when turned in so that seems like less air into the throttle body. Is that correct?
My dysfunctional BAC needs to have that screw turned almost all the way inward to keep my idle rpms lower (1100) but still not low enough/normal.
Thanks.
#4
Moderator
iTrader: (1)
Ok thanks.
Second question is about the BAC adjustment screw at it's front. If it's turned fully inward into the BAC what does that do as opposed to fully turned out?
I know my idle will decrease when turned in so that seems like less air into the throttle body. Is that correct?
My dysfunctional BAC needs to have that screw turned almost all the way inward to keep my idle rpms lower (1100) but still not low enough/normal.
Thanks.
Second question is about the BAC adjustment screw at it's front. If it's turned fully inward into the BAC what does that do as opposed to fully turned out?
I know my idle will decrease when turned in so that seems like less air into the throttle body. Is that correct?
My dysfunctional BAC needs to have that screw turned almost all the way inward to keep my idle rpms lower (1100) but still not low enough/normal.
Thanks.
#5
Full Member
Thread Starter
Join Date: Jul 2009
Location: Silicon Valley
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
Non-turbo.
It's a nut that fits an Allen wrench at the front of the BAC. I can turn it and idle rates change. Seen posts about this months ago on the site but I'm not quite sure how they relate to my current problems. The reason I previously messed around with my BAC was the fluctuating idle problem. Posts said to clean the BAC and some mentions were made of adjusting this hex head screw.
Thanks.
It's a nut that fits an Allen wrench at the front of the BAC. I can turn it and idle rates change. Seen posts about this months ago on the site but I'm not quite sure how they relate to my current problems. The reason I previously messed around with my BAC was the fluctuating idle problem. Posts said to clean the BAC and some mentions were made of adjusting this hex head screw.
Thanks.
#6
Moderator
iTrader: (1)
Non-turbo.
It's a nut that fits an Allen wrench at the front of the BAC. I can turn it and idle rates change. Seen posts about this months ago on the site but I'm not quite sure how they relate to my current problems. The reason I previously messed around with my BAC was the fluctuating idle problem. Posts said to clean the BAC and some mentions were made of adjusting this hex head screw.
Thanks.
It's a nut that fits an Allen wrench at the front of the BAC. I can turn it and idle rates change. Seen posts about this months ago on the site but I'm not quite sure how they relate to my current problems. The reason I previously messed around with my BAC was the fluctuating idle problem. Posts said to clean the BAC and some mentions were made of adjusting this hex head screw.
Thanks.
#7
Full Member
Thread Starter
Join Date: Jul 2009
Location: Silicon Valley
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
Is there some cheap hack or fix for this or do I have to buy used BAC? If I have to replace the BAC do you have suggestions on where to get one?
Thanks.
Trending Topics
#8
Moderator
iTrader: (1)
There's a for sale section on this board that you could use to source a replacement. It is possible though to lightly mess w/the Allen bolt w/o damaging the BAC but if you really screwed around with it then it could actually be damaged. I believe there is a spring inside that would become damaged if the bolt was turned too much. The BAC pulses open and then closed in repeated fashion. The spring has control over this flapping mechanism.
#9
Full Member
Thread Starter
Join Date: Jul 2009
Location: Silicon Valley
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
There's a for sale section on this board that you could use to source a replacement. It is possible though to lightly mess w/the Allen bolt w/o damaging the BAC but if you really screwed around with it then it could actually be damaged. I believe there is a spring inside that would become damaged if the bolt was turned too much. The BAC pulses open and then closed in repeated fashion. The spring has control over this flapping mechanism.
#11
Full Member
Thread Starter
Join Date: Jul 2009
Location: Silicon Valley
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/bac-removal-886512/
A post has a pic of BAC insides and I probably did crush the spring on the terminal side but I might be able to unscrew that hex nut and replace it.
------------
Last edited by mszlazak; 05-24-12 at 10:35 AM.
#13
Full Member
Thread Starter
Join Date: Jul 2009
Location: Silicon Valley
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
The other issue is that I need to screw in that hex nut to keep my idle lower (1000-1100) but still not normal (750). Looking at the BAC schematic it seems that turning that screw into the BAC puts more closing pressure on the valve and this seems to mean something else is wrong.
Last edited by mszlazak; 05-25-12 at 10:50 AM.
#14
Moderator
iTrader: (1)
If I can easily get a similar spring then isn't the right compression simply determined by voltage readings coming from the BAC or is there more?
The other issue is that I need to screw in that hex nut to keep my idle lower (1000-1100) but still not normal (750). Looking at the BAC schematic it seems that turning that screw into the BAC puts more closing pressure on the valve and this seems to mean something else is wrong.
The other issue is that I need to screw in that hex nut to keep my idle lower (1000-1100) but still not normal (750). Looking at the BAC schematic it seems that turning that screw into the BAC puts more closing pressure on the valve and this seems to mean something else is wrong.
And since I've never seen replacing the BAC spring on this board you are entering virgin territory.
Thread
Thread Starter
Forum
Replies
Last Post