PLX SM-AFR question..............

[FreddyG]

Hi Guys!

While logging with my PLX SM_AFR WB02, instead of it giving me the varying voltage readings (0-5v=10-20AFR), it's giving me a flat 3.5v. Has this happened to any of you before and if so, could you Please tell me how you fixed it?

I have the SM-AFR+DB5 (gauge) combo and the gauge still registers the AFR. It doesn't stay at one certain reading, it works as it should.

Thanks in advance!

[Chalky]

Have you selected the proper pids when you setup the M250?

Without the proper pids, you will not get any reasonable readings.

[FreddyG]

Hi Chalky!

Thanks for the help!

I think that I've got the right ones selected, but am open to any and all suggestions, criticism, or advice that you'd be willing to share.

Here's my current selection of PID's:

[Chalky]

Looks good. DId your get the pic I sent showing the wiring diagram?

Pics courtesy of Bruce Melton!

[FreddyG]

I didn't get the pics, but I looked at the attachment and I didn't put the capacitor on there. Could that be part ofthe reason for the lack of slope or the flat readings?

Thanks for the help Chalky and Bruce Melton too!

[Chalky]

I didn't get the pics, but I looked at the attachment and I didn't put the capacitor on there. Could that be part ofthe reason for the lack of slope or the flat readings?

Thanks for the help Chalky and Bruce Melton too!

No. Shouldn't make a difference. I can PM the pics using IM.

Did you open my attachment I included in my previous post? That shows you the wiring diagram.

[FreddyG]

Yes Sir I did open it up and mine is wired the same way except that I didn't use the capacitor.

How can I check and compare the findings? I sent an e-mail to Nick at PLX and am awaiting an answer from them.

Thanks again Chalky!

[Chalky]

Are you using V1 or V2?

[FreddyG]

I've got V1.

[Chalky]

http://www.plxdevices.com/products/m300/

Try this. M250 and M300 same unit.