85 -Weird BLM readings
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Instructor
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From: Crestwood Mo
85 -Weird BLM readings
Have been fighting lean mixture problem and high oxides of nitrogin. Most of the problem was in the air pump system including the diverter and switching valve. I did get the integrator numbers within proper range. As I was viewing the BLM numbers with my Auto Xray as the engine was running the digets would start with 1 and increase to ,I think, 250 and then begin all over again. Would that be the scanner, or the ECM, or what. How can the integrator numbers be normal and the BLM so screwed up????? I also noticed that as soon as the engine goes into closed loop I get a lean flag mixture reading. No trouble codes, seems to run good. I need some help from a higher power than myself....
Thanks in advance.....
Thanks in advance.....
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Instructor
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From: Crestwood Mo
Originally Posted by Bluevette85
If you do a search, other people have reported problems with using an Autoxray with the 85 ecm.
Drifting
Joined: Nov 2001
Posts: 1,783
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From: Latham NY
Originally Posted by 62k
Thanks, I'll give it a shot..Too many malfunctions and not enough answers. What type of scanner do you use for your 85????
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Instructor
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From: Crestwood Mo
Originally Posted by Bluevette85
I used Winaldl but I have converted to the 165 ecm so I use Tunerpro and Datamaster.
Thanks for the suggestions. I haven't had anyone indicate similiar problems with their Auto Xray. There's always tomorrow....
Drifting
Joined: Nov 2001
Posts: 1,783
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From: Latham NY
Originally Posted by 62k
How did you get the different ecm to function with the 85 schmatics and wire loom? I'm not in that arena yet.
Thanks for the suggestions. I haven't had anyone indicate similiar problems with their Auto Xray. There's always tomorrow....
Thanks for the suggestions. I haven't had anyone indicate similiar problems with their Auto Xray. There's always tomorrow....
Here's how to adapt to the 165 ecm
870 to 165 Instructions
As I suggested earlier, use the search for 'autoxray 85' and you will find many people with the same problem.
Thread Starter
Instructor
Joined: Oct 2002
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From: Crestwood Mo
Originally Posted by Bluevette85
Here's how to adapt to the 165 ecm
870 to 165 Instructions
As I suggested earlier, use the search for 'autoxray 85' and you will find many people with the same problem.
870 to 165 Instructions
As I suggested earlier, use the search for 'autoxray 85' and you will find many people with the same problem.
Thanks again
62k
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Thread Starter
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Joined: Oct 2002
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From: Crestwood Mo
Originally Posted by Bluevette85
Use the 'Search' button at the top of the page. Go to the advanced search and select archive then highlight C4 Corvettes. 
Bit the bullet today and revisited the emission police on the chance that the integrater numbers were correct, 125 to o/a 135, and the BLM numbers 1 to 250 was a malfunction of the scanner. To my amazement the old 383-85 passed with flying colors. The culprit all along was the air pump system. The check valves, diverter and switch valves were defunct which was causing a high reading of oxides of nitrogin, a no pass.
Thanks again for your help and suggestions.
62k
Le Mans Master
Joined: Jul 2001
Posts: 6,252
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From: Silicon Valley Kalifornia
Originally Posted by 62k
Oh...
Bit the bullet today and revisited the emission police on the chance that the integrater numbers were correct, 125 to o/a 135, and the BLM numbers 1 to 250 was a malfunction of the scanner. To my amazement the old 383-85 passed with flying colors. The culprit all along was the air pump system. The check valves, diverter and switch valves were defunct which was causing a high reading of oxides of nitrogin, a no pass.
Thanks again for your help and suggestions.
62k
Bit the bullet today and revisited the emission police on the chance that the integrater numbers were correct, 125 to o/a 135, and the BLM numbers 1 to 250 was a malfunction of the scanner. To my amazement the old 383-85 passed with flying colors. The culprit all along was the air pump system. The check valves, diverter and switch valves were defunct which was causing a high reading of oxides of nitrogin, a no pass.
Thanks again for your help and suggestions.
62k
Did you replace all the divert valves? Why were they causing a lean condition? I think I may have a similar situation. Thx!
Drifting
Joined: Mar 2005
Posts: 1,923
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From: GA
Originally Posted by MrNuke
I get the same thing of the BLM #'s counting from 1 to 254 then restarting with WinALDL. I think it's an '870 ecm thing..