Why did you do that?Originally Posted by nick123
Why did you do that?
He is followin the procedures written here, he is tryin to find his sweet spot for idle 1&2 without any interference from min airflow.
He doesnt need to do this if he is runnin a mild cam. The min airflow just needed to be adjusted
American Muscle, European Design, Japanese Tactics
Naf, thanks for that explanation... but I was asking nick123 that question to see if he has any understanding of what he's doing or if he's just blindly following the procedure. Yeah, he probably doesn't need to do this with a mild cam but it's his choice.
Yeah I'm planning on adding a cam shortly probably a rcr dragmaster. I understand maxing out min idle air B1829 will cause the ecm to disregard minimum idle limits essentially doing away with the lower hard limit.
[QUOTE=nick123;252663]the closer I get to 550rpm using B1652 to reduce idle speed the rougher is seems to idle.
I zeroed 1845 and 1843
63 g/s in b1829
First start after idle trim reset ....runaway idle to 1000rpm
Used 1852 to bring idle down started with 1.1 went down to .75 still 630rpm
Ran best at .8 702rpm
Ok so I kept going
.6 in B1652 680 rpm
.5 and it hits target rpm right away dosen't slowly idle down while cutting timing... timing barely spiking above commanded
.4 sputters adds allot of timing 32 deg
.53 starts just over commanded rpm slowly idles down while cutting some timing then adds timing back after reaching 550rpm
I drive around like this for a day added some timing 25 deg adds some rasp...idles around nice in parking lots and low speed cornering. Before with stock settings it would hang in 3rd and do a firm 3-2 downshift at about 25 to 30 kmhr super annoying...
So the problem now is cold starting it at .53
.53 sputters
.6 a bit better but wont stay running
.7 same here
.8 stays running but throws code (cold start enrichment)
.9 throws code
1.0 no code
This was all done cold and with B1829 maxed out and 1843 and 1845 zeroed.
At 1.0 in B 1852 it idles at about 750 and pushing 8 to 9 per second
I add the 1843 back and change 1845 increasing g/s in negative idle areas up to 0 at 0 and decrease g/s in positive idle areas.
What mods have you already done?
Kooks headers
3inch exhaust
Aem intake
Solo mufflers
Smaller harmonic balancer
So I'm just reading this thread more and I'm confused do you set 1651 and 1652 back to factory after building the 1829 table out? I set up a map in v8...
Kooks headers
3inch exhaust
Aem intake
Solo mufflers
Smaller harmonic balancer
So I'm just reading this thread more and I'm confused do you set 1651 and 1652 back to factory afterbuilding the 1829 table out? I set up a map in v8...
Long tubes?
No the ones that come with the hi flow cats
Shorties 1 7/8 with 3inch collector
And a 3.27 Camaro rear diff
Do you put your B1651 and 1652 back to stock after tuning theB1829 table or...
do you leave1651 and 1652 slightly above your target idle and let it learn down
Posting Permissions
Reply With Quote