# sr20det MAF voltages **URL:** \ **Category:** SON240sx Automotive\ **Created:** [October 18, 2010, 2:58pm UTC](https://forums.speedlife.net/t/sr20det-maf-voltages/161643 "2010-10-18T14:58:48Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Steve660](https://avatars.discourse-cdn.com/v4/letter/s/ecb155/32.png) [@Steve660](https://forums.speedlife.net/u/Steve660)\ **Post date:** [October 18, 2010, 2:58pm UTC](https://forums.speedlife.net/t/sr20det-maf-voltages/161643/1 "2010-10-18T14:58:48Z")
Hey guys. I need some help diagnosing a maf voltage problem. Pretty much I reach max voltage way to quickly. I hit 5 volts at 5500rpm and the car gets mad and makes no power and leans way out. As of right now I believe the cause is routed to poor grounding. V=IR R being to high… Anyways what I’m looking for is a voltage per rpm data. A graph would be awesome. I have search for this all over google already with no luck I know at idle I should be between 0.8 and 1.4V and at 3000rpm between 1.4 and 2.0?V at idle I read a bit over, around 1.45+ v, @ 3000rpm I see right about 2.0volts but no lower so I’m at the high side of both of those intervals. The problem is I don’t know what to expect to see beyond 3000rpm. My set up is pretty much stock. I have an FMIC and exhaust but only running 7psi. It was dynoed at 200whp so I should be no were near maxing the sr20 maf. Any help is greatly appreciated wiring sucks! Thanks, Steve ---
**Author:** ![Steve660](https://avatars.discourse-cdn.com/v4/letter/s/ecb155/32.png) [@Steve660](https://forums.speedlife.net/u/Steve660)\ **Post date:** [October 19, 2010, 7:50am UTC](https://forums.speedlife.net/t/sr20det-maf-voltages/161643/2 "2010-10-19T07:50:46Z")
can anyone tell me what voltage they see just at 5000rpm? This is easy with a safc if anyone has one installed ---------- Post added at 02:50 PM ---------- Previous post was at 02:28 PM ---------- ![http://img.photobucket.com/albums/v282/tamboman/parts%20for%20sale/grounds/mafFSM.jpg](http://img.photobucket.com/albums/v282/tamboman/parts%20for%20sale/grounds/mafFSM.jpg) Does anyone know what the dotted cylinder over the two wires from the the ecu that is grounded represents? It is grounded to the ECU as well?