Plx dm-6 and ms3x gauges reads .2 different

3tc power · Post by **3tc power** » Mon Jul 21, 2014 11:12 am

ok so i did a search before i made this thread because i don't want to make something that is already floating around. ok so i got my mk3 supra running full sequential ign and fuel. not i noticed my ms3 AFR gauge was reading .2 leaner than my PLX gauge. they pretty much move together but like i mentioned ms3 is .2 leaner for some reason. and another thing i noticed is that my car seem to like idling 13.0 better than 14.0-14.7 afr which is weird to me since I'm full sequential.

thanks in advance

Matt Cramer · Post by **Matt Cramer** » Mon Jul 21, 2014 11:43 am

Where is the wideband grounded?

3tc power · Post by **3tc power** » Tue Jul 22, 2014 5:33 am

Matt Cramer wrote:Where is the wideband grounded?

i grounded it to the Chassis under the dash!

Matt Cramer · Post by **Matt Cramer** » Tue Jul 22, 2014 5:50 am

What happens if you relocate that to a point approximately 1-2" from the MegaSquirt ground location?

Precision electronics require precision grounding.

3tc power · Post by **3tc power** » Tue Jul 22, 2014 9:02 am

Matt Cramer wrote:What happens if you relocate that to a point approximately 1-2" from the MegaSquirt ground location?

Precision electronics require precision grounding.

so i have to use the same ground as the ms3 for them to be on the same page? or close to the same point as the ms3?

Matt Cramer · Post by **Matt Cramer** » Tue Jul 22, 2014 10:33 am

Exactly.

3tc power · Post by **3tc power** » Tue Jul 22, 2014 11:36 am

ok cool thanks for the help Matt Cramer! i will post my results when i move everything.

3tc power · Post by **3tc power** » Sat Sep 06, 2014 6:31 am

So i found out what my idle issue was. it turns out that the old delphi 880cc doesn't like to idle around 13.8-14.7 afr, seems like everyone that has them had the same issue.(they like rich idles)
but i moved my ground of the PLX DM-6 to the same ground as the ms3 but is looks like it got worse than where i had it before. on my afr calibration settings i noticed that if i select a specific calibration burn it go out and go back in the calibration settings it won't show what i had selected before. is that normal?

kjones6039 · Post by **kjones6039** » Sat Sep 06, 2014 7:39 am

if i select a specific calibration burn it go out and go back in the calibration settings it won't show what i had selected before. is that normal?

Yes.

Ken

3tc power · Post by **3tc power** » Thu Sep 11, 2014 5:47 am

ok thanks kjones6039

well i moved the ground directly to the head and it seems to like it better there. not perfect but i will live with .2 difference. not moving that s*** again lmao, but thanks for the info guys i really appreciate it.

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Plx dm-6 and ms3x gauges reads .2 different

Plx dm-6 and ms3x gauges reads .2 different

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Re: Plx dm-6 and ms3x gauges reads .2 different

Re: Plx dm-6 and ms3x gauges reads .2 different

Re: Plx dm-6 and ms3x gauges reads .2 different

Re: Plx dm-6 and ms3x gauges reads .2 different

Re: Plx dm-6 and ms3x gauges reads .2 different

Re: Plx dm-6 and ms3x gauges reads .2 different

Re: Plx dm-6 and ms3x gauges reads .2 different

Re: Plx dm-6 and ms3x gauges reads .2 different