Problem with vafc hack
Thread Starter
1.0 BAR
Joined: Dec 2003
Posts: 250
Re:Problem with vafc hack
Originally Posted by Dr.Boost
Everything is hooked up correct? Did you check? Double check? The grounds are hooked up right and the in and out are correct? What does it read for sensors? (ETC>Misc.>sensor check>)
the vafc has been in the car for like 2 years without problems....so i really dont think it is the problem...
could the map sensor be causing the idle problems....or maybe a vaccum leak somewhere
3.0 BAR
Joined: Mar 2003
Posts: 21,468
Re:Problem with vafc hack
What? Dude, like 4 posts up you told me you just did this today. WTF?
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Thread Starter
1.0 BAR
Joined: Dec 2003
Posts: 250
Re:Problem with vafc hack
Originally Posted by Dr.Boost
What? Dude, like 4 posts up you told me you just did this today. WTF?
the car has been boosted for 2 years
3.0 BAR
Joined: Feb 2003
Posts: 9,089
Re:Problem with vafc hack
what size injectors? if they are 450cc DSM injectors the idle settings should be at -46 or -47. 450-47% = 240cc (stock size). but a high idle usually means a vac leak... i'm assuming the only thing you installed was the injectors and then this problem started happening, my guess would be that the o-rings/injector seals are leaking causing a vac leak.
Thread Starter
1.0 BAR
Joined: Dec 2003
Posts: 250
Re:Problem with vafc hack
There was a vaccum line unhooked.....plugged it back in and now it idles perfectly.
here are my settings
1000: -45
1500: -44
2000: -42
2500: -40
3000: -40
3500: -40
4100: -39
4700: -38
5000: -38
5500: -38
6000: -38
7000: -38
8000: -37
9000: -37
the only problem i am having now is if i try to hold the idle at like 3000 rpm with the clutch in...every few seconds it drops to 2000 then back to 3000....almost like a rev control or somethin....any ideas?
here are my settings
1000: -45
1500: -44
2000: -42
2500: -40
3000: -40
3500: -40
4100: -39
4700: -38
5000: -38
5500: -38
6000: -38
7000: -38
8000: -37
9000: -37
the only problem i am having now is if i try to hold the idle at like 3000 rpm with the clutch in...every few seconds it drops to 2000 then back to 3000....almost like a rev control or somethin....any ideas?
3.0 BAR
Joined: Apr 2003
Posts: 2,260
Re:Problem with vafc hack
First off, I would fatten up settings below 3000 RPMs due to injector latency. This will help compensate for the time it takes to open injector.
Remember, your stock maps are pusling for 240 injectors which do not take as long to open as 450s due to the smaller amount of mosing mass.
Personally, Iw ould probably compensate 5% decreasing by 1% as you increase to 3000 RPMs.
..essentially, -40%, -39%, -38%, -37% -36%.. and hold -36% across the board, maybe -35% above VTEC cross over..
Remember, your stock maps are pusling for 240 injectors which do not take as long to open as 450s due to the smaller amount of mosing mass.
Personally, Iw ould probably compensate 5% decreasing by 1% as you increase to 3000 RPMs.
..essentially, -40%, -39%, -38%, -37% -36%.. and hold -36% across the board, maybe -35% above VTEC cross over..
1.0 BAR
Joined: Dec 2002
Posts: 463
Re:Problem with vafc hack
^I agree.
You're idling too high anyway. You need to enrich that more on the low end side. When I switched from OBD2a to OBD1, I didnt reconfigure my settings. My idle was very erratic which pretty much jumping from 800 RPM to almost 2000RPM. I went ahead and enriched fuel under the 3K area.... it now idles like stock again
You're idling too high anyway. You need to enrich that more on the low end side. When I switched from OBD2a to OBD1, I didnt reconfigure my settings. My idle was very erratic which pretty much jumping from 800 RPM to almost 2000RPM. I went ahead and enriched fuel under the 3K area.... it now idles like stock again
Thread Starter
1.0 BAR
Joined: Dec 2003
Posts: 250
Re:Problem with vafc hack
Originally Posted by thermalfi'd16
^I agree.
You're idling too high anyway. You need to enrich that more on the low end side. When I switched from OBD2a to OBD1, I didnt reconfigure my settings. My idle was very erratic which pretty much jumping from 800 RPM to almost 2000RPM. I went ahead and enriched fuel under the 3K area.... it now idles like stock again
You're idling too high anyway. You need to enrich that more on the low end side. When I switched from OBD2a to OBD1, I didnt reconfigure my settings. My idle was very erratic which pretty much jumping from 800 RPM to almost 2000RPM. I went ahead and enriched fuel under the 3K area.... it now idles like stock again
