Power wire
Champion
Joined: May 2009
Posts: 2,732
Likes: 1
From: La Union, Philippines
I doubt that there is any mileage gains. It tells the computer to run in the open loop configuration, which ignores the O2 sensors inputs. This fattens the injector pulse and give a bit more response. I am using a 180 degree thermostat which probably does the same thing only using the water temperature sensor instead of the air sensor. If you want truely free hp, try a eFan.
Record Breaker
Joined: Nov 2008
Posts: 2,273
Likes: 1
From: Pierce County, Wa
It hasnt really helped with mileage for me. If anything, it's reduced it. You only see the benefit when you are at WOT, and at that point you're just guzzling gas anyways.
Trending Topics
Site Moderator
Joined: May 2008
Posts: 9,657
Likes: 24
From: Louisville, Ky
It will run a little richer (more fuel) and have a little more timing. It does not put the thing into open loop. It just fools the PCM into thinking the incoming air is about 20 degrees cooler. It is basically a $65 2 buck 4.7K ohm resistor.
Champion
Joined: May 2009
Posts: 2,732
Likes: 1
From: La Union, Philippines
I'm thinking this should be working at partial thottle as WOT is always open loop anyway. So telling the computer the inlet temp is 20 degree cooler richens A/F at partial thottle. Anyway that's what I'm think'n.
Record Breaker
Joined: Nov 2008
Posts: 2,273
Likes: 1
From: Pierce County, Wa
This is the info from one of the more popular vendors selling these
Your O2 sensors keep your Air Fuel ratio nailed to 14.75:1 at all throttle positions except Wide Open Throttle (WOT) so the POWER WIRE can NOT cause you to run rich during normal driving because no matter what the AFR will be 14.75:1. For this reason The Power Wire has been reported to add 1-2MPG increase when driven lightly. But at WOT the Power Wire will add approximately 2.5% at WOT. When your at WOT you are more concerned with HP than MPG at that moment in time and while passing an additional 8-10RWHP is exactly what your looking for.