W-B o2 problems.
10-04-2008, 10:33 PM
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Car: 1989 Camaro
Engine: 383
Transmission: 700R4
Axle/Gears: 3.73
W-B o2 problems.
I had the old diy-wb controller which was wired to the ecm so I could datalog. After lots of tuning I managed to get my tune close to where it needed to be according to my w-b. The problem was I had to take a lot of SA out for the car to be driveable under light load. When I go WOT from a stop the WB would show 12.5/1 (give or take) but I could see black smoke in the mirror. Normal driving the w-b would show 15 to 16/1 but the plugs show a rich condition.
I figure it was my DIY w-b so I ordered the LC-1 with the O-meter. I got it all hooked up and the O-meter did show the engine running richer than what I had been seeing so I figured I had the problem solved. NOT!!! I also wired the LC-1 to the ecm for datalogging and for some reason the O-meter will so one reading and Tunerpro shows another.
Looks like I may not have needed the LC-1 after all.
Now I need to try and figure out how to make my AFR in the datastream show the same as the O-meter. Any ideas?
Dewayne.
I figure it was my DIY w-b so I ordered the LC-1 with the O-meter. I got it all hooked up and the O-meter did show the engine running richer than what I had been seeing so I figured I had the problem solved. NOT!!! I also wired the LC-1 to the ecm for datalogging and for some reason the O-meter will so one reading and Tunerpro shows another.
Looks like I may not have needed the LC-1 after all. Now I need to try and figure out how to make my AFR in the datastream show the same as the O-meter. Any ideas?
Dewayne.
10-09-2008, 07:27 PM
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Car: 85 camaro z28
Engine: 305
Transmission: auto to manaul
Re: W-B o2 problems.
wat ecm? the way i understand it, there is a offset. ecm and lc1 needs the same ground
10-21-2008, 12:08 PM
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Car: 83 Z28
Engine: 406
Transmission: T56
Axle/Gears: 9" with 4.10s
Re: W-B o2 problems.
Make sure you set the calibrations for both accordingly. I had same problem with EBL and o-meter reading different. The o-meter itself comes cal'd at 7.68 = 0V and 5V =22.??. EBL wanted 0-5V - 10-20:1.
You can always use LogWorks that comes with LC-1 to get a direct reading. LogWorks 3 is out now. I just downloaded it from their website.
You can always use LogWorks that comes with LC-1 to get a direct reading. LogWorks 3 is out now. I just downloaded it from their website.
11-03-2008, 10:32 AM
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Car: 1989 Camaro
Engine: 383
Transmission: 700R4
Axle/Gears: 3.73
Re: W-B o2 problems.
After checking out this link ://www.eecis.udel.edu/~davis/z28/WB_hacs/
I read the following
"Calibrations were done using a 0v to 4V potentiometer circuit"
According to the papers that came with the LC-1 its default output is 0v=7.35 AFR and 5v = 22.29. the O-meter is also setup for 0v to 5V.
No wonder my O-Meter and TunerPro don't match up. I hate to change the LC-1 and O-meter settings because I feel I'm getting the correct reading and do not want to chance screwing that up. Looks like I need to figure out how to change the bin or TunerPro.
I read the following
"Calibrations were done using a 0v to 4V potentiometer circuit"
According to the papers that came with the LC-1 its default output is 0v=7.35 AFR and 5v = 22.29. the O-meter is also setup for 0v to 5V.
No wonder my O-Meter and TunerPro don't match up. I hate to change the LC-1 and O-meter settings because I feel I'm getting the correct reading and do not want to chance screwing that up. Looks like I need to figure out how to change the bin or TunerPro.
11-04-2008, 12:05 PM
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Car: 86 Monte SS (730,$8D,G3,AP,4K,S_V4)
Engine: 406 Hyd Roller 236/242
Transmission: 700R4 HomeBrew, 2.4K stall
Axle/Gears: 3:73 Posi, 7.5 Soon to break
Re: W-B o2 problems.
To correct the TP display.
22.29 - 7.35 = 15.55
15.55 / 255 = 0.0609803 (use this as the multiplier) +7.35 offset
Should read exactly as the others now.
22.29 - 7.35 = 15.55
15.55 / 255 = 0.0609803 (use this as the multiplier) +7.35 offset
Should read exactly as the others now.
