Search



Go Back   Third Generation F-Body Message Boards > Tech Boards > DIY PROM
Register Forgot Password?

DIY PROM Do It Yourself PROM chip burning help. No PROM begging. No PROMs for sale. No commercial exchange. Not a referral service.

Welcome to ThirdGen.org!
Welcome to ThirdGen.org.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!


Reply
 
Thread Tools Search this Thread
Old 09-29-2010, 06:34 PM   #1
Member
 
Join Date: Jan 2002
Location: Daytona Beach, FL
Posts: 215
Car: 88 GTA
Engine: 355 TPI
Transmission: 700 R4
Axle/Gears: 370 BW

Classifieds Rating: (0)

Send a message via AIM to jo88gta
Zero Cross Counts at idle

In closed loop, I am getting intermittent Code 44 (Lean) at idle and zero cross counts. Needless to say, a rough idle goes along with this data. The 02 sensor readings are around 360 to 440 mvolts (at idle), it never crosses the 450 mvolts threshold. Fuel pressure is right on 48 lbs. The BLM and INT are dead on 128. I burn my own chips and am not sure if I need to add fuel or swap the fairly new 02 sensor. Shouldn’t the ECM be adding fuel to compensate? Any guidance would be much appreciated.
__________________
355 - TPI, Edelbrock High Flow intake and runners - ported/polished. 24# injectors, Crane Cam, Air Foil, Cold Air Intake, Moates 4mb Prom adapter w/remote, Edelbrock Headers, Gale Banks 3" Cat Back, 3.70 - 9 bolt BW Rear, Spohn lower control arms, Poly Carbon bushings all around, K&N Filter, MSD 6AL Ignition, Coil and Wires, 4th Gen R-Spoiler, B&M Mega Shifter, Crane AFR, TD "Wonderbar", SFC's, 2000 Z28 leather seats
jo88gta is offline vBGarage Page   Reply With Quote
Old 09-30-2010, 12:43 AM   #2
Supreme Member
 
Join Date: Aug 1999
Location: sweden
Posts: 2,386
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt

Classifieds Rating: (0)

Re: Zero Cross Counts at idle

Is the O2-sensor "ready"? does it start to "react" when revving?

Maybe its not getting hot enough during idle, it should bounce between bigger values. Try a new heated O2 they dont cost very much.
__________________
GTA -89:415cui 749ECM+$59code+ p/h injectors+Procharger F1 + 4L80E

http://medlem.spray.se/gta324 Updated 2007-02-07

testdrive

http://www.youtube.com/watch?v=qcaDt7-HABo
gta324 is offline vBGarage Page   Reply With Quote
Old 09-30-2010, 07:26 AM   #3
Member
 
Join Date: Jan 2002
Location: Daytona Beach, FL
Posts: 215
Car: 88 GTA
Engine: 355 TPI
Transmission: 700 R4
Axle/Gears: 370 BW

Classifieds Rating: (0)

Send a message via AIM to jo88gta
Re: Zero Cross Counts at idle

Yes, the O2 sensor reads "Ready" and it reacts when revving. Once revved the code goes away, back to idle and code is back after a couple minutes. I am just a little confused why the ECM wouldn't be adding more fuel to try and correct the problem itself. The engine is running at operating temp (Around 212) and the headers and exhaust are tight as a drum.
__________________
355 - TPI, Edelbrock High Flow intake and runners - ported/polished. 24# injectors, Crane Cam, Air Foil, Cold Air Intake, Moates 4mb Prom adapter w/remote, Edelbrock Headers, Gale Banks 3" Cat Back, 3.70 - 9 bolt BW Rear, Spohn lower control arms, Poly Carbon bushings all around, K&N Filter, MSD 6AL Ignition, Coil and Wires, 4th Gen R-Spoiler, B&M Mega Shifter, Crane AFR, TD "Wonderbar", SFC's, 2000 Z28 leather seats
jo88gta is offline vBGarage Page   Reply With Quote
Old 09-30-2010, 08:10 AM   #4
Supreme Member
 
Twin_Turbo's Avatar
 
Join Date: Jun 2000
Location: Enschede, Netherlands
Posts: 4,471
Car: 82 TA 87 IZ L98 88 IZ LB9 88 IZ L98
Engine: 5.7TBI 5,7TPI 5.0TPI, 5,7TPI
Transmission: T5, 700R4, T5, 700R4
Axle/Gears: 3.08, 3.27, 3.45, 3.27

Classifieds Rating: (24)

Send a message via AIM to Twin_Turbo
Re: Zero Cross Counts at idle

so at idle it coems out of closed loop back to open? You need a heated sensor.
Twin_Turbo is offline vBGarage Page   Reply With Quote
Old 09-30-2010, 08:36 AM   #5
Member
 
Join Date: Jan 2002
Location: Daytona Beach, FL
Posts: 215
Car: 88 GTA
Engine: 355 TPI
Transmission: 700 R4
Axle/Gears: 370 BW

Classifieds Rating: (0)

Send a message via AIM to jo88gta
Re: Zero Cross Counts at idle

Quote:
Originally Posted by Twin_Turbo View Post
so at idle it coems out of closed loop back to open? You need a heated sensor.
No, it stays in "closed" loop. That is why I don't understand why BLM and INT are perfect at 128 and I am getting a "ready", "lean" and 0 "cross counts" with O2 voltages at 360 to 440 mvolts.
jo88gta is offline vBGarage Page   Reply With Quote
Old 09-30-2010, 11:00 AM   #6
TGO Supporter
 
Ronny's Avatar
 
Join Date: Mar 2003
Location: wisconsin
Posts: 6,687

Classifieds Rating: (0)

Re: Zero Cross Counts at idle

Try idle at open loop option and see if you like it.
Ronny is offline vBGarage Page   Reply With Quote
Old 09-30-2010, 12:32 PM   #7
Member
 
Join Date: Jan 2002
Location: Daytona Beach, FL
Posts: 215
Car: 88 GTA
Engine: 355 TPI
Transmission: 700 R4
Axle/Gears: 370 BW

Classifieds Rating: (0)

Send a message via AIM to jo88gta
Re: Zero Cross Counts at idle

I am not sure what you are referring to, could you please explain?
__________________
355 - TPI, Edelbrock High Flow intake and runners - ported/polished. 24# injectors, Crane Cam, Air Foil, Cold Air Intake, Moates 4mb Prom adapter w/remote, Edelbrock Headers, Gale Banks 3" Cat Back, 3.70 - 9 bolt BW Rear, Spohn lower control arms, Poly Carbon bushings all around, K&N Filter, MSD 6AL Ignition, Coil and Wires, 4th Gen R-Spoiler, B&M Mega Shifter, Crane AFR, TD "Wonderbar", SFC's, 2000 Z28 leather seats
jo88gta is offline vBGarage Page   Reply With Quote
Old 09-30-2010, 12:39 PM   #8
TGO Supporter
 
Ronny's Avatar
 
Join Date: Mar 2003
Location: wisconsin
Posts: 6,687

Classifieds Rating: (0)

Re: Zero Cross Counts at idle

Your mask may not support OL idle. It is a flag in my mask(EBL.xdf).
Ronny is offline vBGarage Page   Reply With Quote
Old 09-30-2010, 12:57 PM   #9
Member
 
Join Date: Jan 2002
Location: Daytona Beach, FL
Posts: 215
Car: 88 GTA
Engine: 355 TPI
Transmission: 700 R4
Axle/Gears: 370 BW

Classifieds Rating: (0)

Send a message via AIM to jo88gta
Re: Zero Cross Counts at idle

Quote:
Originally Posted by Ronny View Post
Your mask may not support OL idle. It is a flag in my mask(EBL.xdf).
I am using an ARAP.bin and 6E.xdf. I don't believe I have that option. I searched and saw nothing along those lines. Any other suggestions?
jo88gta is offline vBGarage Page   Reply With Quote
Old 09-30-2010, 03:09 PM   #10
Supreme Member
 
Join Date: Aug 1999
Location: sweden
Posts: 2,386
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt

Classifieds Rating: (0)

Re: Zero Cross Counts at idle

post a log file?...but it sound like you'll need a new O2.....
__________________
GTA -89:415cui 749ECM+$59code+ p/h injectors+Procharger F1 + 4L80E

http://medlem.spray.se/gta324 Updated 2007-02-07

testdrive

http://www.youtube.com/watch?v=qcaDt7-HABo
gta324 is offline vBGarage Page   Reply With Quote
Old 10-02-2010, 11:57 PM   #11
Senior Member
 
xch3no2's Avatar
 
Join Date: Oct 2009
Location: Pacific NW
Posts: 676
Car: 89 K3500 Fleetside
Engine: RAT *tbi* EBL
Transmission: TH400
Axle/Gears: 3.73-Dana 60

Classifieds Rating: (0)
Re: Zero Cross Counts at idle

Quote:
Originally Posted by Twin_Turbo View Post
You need a heated sensor.
I concur, and w/gta324, not that it has to fall from closed loop, but o2 volts sound stiff & lean esp for your mods. (edited, I think I said it better this time).

Look at prop gain and O2 target values, maybe BPC.
Somehow it thinks it's doing the right thing when it's wrong.

Maybe your starting BIN's were modified for another engine/induction configuration?

Last edited by xch3no2; 10-03-2010 at 06:37 PM.
xch3no2 is offline vBGarage Page   Reply With Quote
Old 10-03-2010, 09:43 AM   #12
Member
 
Join Date: Jan 2002
Location: Daytona Beach, FL
Posts: 215
Car: 88 GTA
Engine: 355 TPI
Transmission: 700 R4
Axle/Gears: 370 BW

Classifieds Rating: (0)

Send a message via AIM to jo88gta
Re: Zero Cross Counts at idle

Ok, I appreciate the input. I currently do not have the ability to capture the data to share. I will post the data when I can and update you with any additional findings. Again, THANKS!
jo88gta is offline vBGarage Page   Reply With Quote
Old 10-03-2010, 09:43 AM
ThirdGen
1992 Camaro




Paid Advertisement


Reply

Go Back   Third Generation F-Body Message Boards > Tech Boards > DIY PROM

Tags
02, 1984, camaro, corvette, counts, cross, crosscounts, crosscountsatidletpi, h, idle, l98, messages, o2, sensor, vin, youtube, zer0
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 03:48 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
All content copyright © 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.

Emails & Contact Details