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kazuma · 04-12-2012, 06:21 PM

Okay I just ran a little test as I am trying to figure out my random rich/lean issue.

I had the car on ON with all accessories on but car off, then I went and checked the voltages at plug for the maf! so the 12v was good, the 5v going to ecu was good, the ground going to chassis was good THEN came the ground going to ecu! I checked this using a 20k ohm test on the voltometer,

What I found out was the ground going to the chasis was at about .4 ohm while the one going to ecu was at 1.4ohm! now I am sure that is not correct! shouldn't all my grounds be about the same?? If this is incorrect should I run another ground from the big ground by the ecu to chassis? what can I check in regards to this?

Any help would be greatly appreciated!

04-12-2012, 06:21 PM	#1
kazuma Zilvia Member Join Date: Jul 2004 Location: winnipeg, manitoba Posts: 150 Trader Rating: (2)	z32 maf ground Q! Okay I just ran a little test as I am trying to figure out my random rich/lean issue. I had the car on ON with all accessories on but car off, then I went and checked the voltages at plug for the maf! so the 12v was good, the 5v going to ecu was good, the ground going to chassis was good THEN came the ground going to ecu! I checked this using a 20k ohm test on the voltometer, What I found out was the ground going to the chasis was at about .4 ohm while the one going to ecu was at 1.4ohm! now I am sure that is not correct! shouldn't all my grounds be about the same?? If this is incorrect should I run another ground from the big ground by the ecu to chassis? what can I check in regards to this? Any help would be greatly appreciated!