{B3647} Open loop AFR

[87gmc]

I understand using this table and setting everything to 14.63 should make the PCM go Close loop, am I correct?

Ok I followed the steps

B4206 Always Use Open Loop EQRatio Tabe : Disable (My Os Didnt have it)

B4205 Closed Loop Temp Enable: Set to max setting (Set mine to 284)

B4108 STFT Idle Enable: Disable

Loaded it into the car and started it let it idle for a while and never went out of open loop. I moniter my afr and it was commanded at 14.68 which my table was set at 14.63. I would give it gas and I would see my afr climb at the points where I adjusted it to.

My question is will the car go into close loop when on the highway if it is hitting the tables where it is 14.63? I know if its not on 14.63 it will go open loop.

I know Disabling STFT IDLE will more than likely keep it in open loop at idle. Is there a purpose to this or this just a technique to activate the Open Loop AFR table. I'm trying to make sure i did everything right

Chris

[Tordne]

You basically stopped the car ever going Closed Loop with the change to {B4205}.

What have you done with {B3618} PE Modifier Based on RPM?

[87gmc]

You basically stopped the car ever going Closed Loop with the change to {B4205}.

What have you done with {B3618} PE Modifier Based on RPM?

I left the B3618 alone, I followed the instructions in efilive http://efilive.com/downloads/customo...20Tutorial.pdf Tutorial.

Also Ross talk about it some in this post http://www.efilive.com/forum/viewtop...=1990&start=15

I know im doing something wrong.

[87gmc]

I'm thinking something may be wrong with table everytime i save it at 14.63 and close the file and reopen its back at 14.62. If Ross is correct about stating it wont go into close loop unless it 14.63 that maybe a problem there also

[Tordne]

{B3801} set to "Disabled" also?

Interesting about the 14.62 thing. I know that the 14.63 number in a lot of cases is actually 14.628573

[87gmc]

Ok so i didnt read down far enough, i swear i get ahead of myself

Ok so long term needs to be disabled also along with STFT is what i gather.

[GMPX]

Something to try, change your units to EQ ratio, make sure that number is 1.00, though rounding errors from the conversion of EQ to AFR is not a known issue right now.
As soon as the O2 sensors become ready (you can monitor that using the PID GM.STATE05) then the PCM will look to the values in table B3647.
If the O2 sensors never become ready then it won't ever go into closed loop via table B3647. Can you please check that out with that PID.
On a warm restart that should only take about 20 - 30 seconds normally.

Cheers,
Ross

[87gmc]

hey ross did you ever get cal for 1270003? i need it

[GMPX]

hey ross did you ever get cal for 1270003? i need it

Paul needs to update the Zip file on the website, hassle him :lol:

Cheers,
Ross

[87gmc]

hey ross did you ever get cal for 1270003? i need it

Paul needs to update the Zip file on the website, hassle him :lol:

Cheers,
Ross

Man even if sends it to me in a email, im not ready to copy and paste again. Going through all the cal is not fun copy and past, copy and paste :oops: