Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - How to: reduce the rich condition of a cold start.

suspectnumber961 · 08-02-2010, 09:08 PM

I've done the CHT sensor and TPS (throttle position sensor) on an '86 Nissan 720 4x4.

I have 2 rheostats in the dash and a switch also on the CHT sensor.

I notice that in warmer weather I can leave the CHT switch "on" and get a good start...in colder weather...it's more difficult to start.

The TPS mod will allow leaning the engine out to the point of reduced power.

I also run an EFIE at 200 mvs....seems to allow the O2 to cycle more easily than with no added mvs.

I don't believe I've documented an mpg gain though. I was having several other tuning/electrical issues with this truck and eventually I put things back to stock...thinking my messing around was the problem...when I noticed an increase in power.

Since I have the rheostats in the dash I can adjust things at will....now running at about 1/2 the LEAN setting I once ran.

What I am messing around with on my wagon is a a fuel vaporizer that has indications of both improving power and mpg....but I really haven't been able to finish testing it....having issues with the gas valve closing up and not allowing gas to vaporize.

Since I can lean the truck down real well...I eventually want to test a fuel vaporizer on it.

Here is some info on the subject:

http://www.nonags.org/members/nijqk/Sensor_mods.doc

08-02-2010, 09:08 PM	#48 (permalink)
suspectnumber961 EcoModding Alien Observer Join Date: Mar 2008 Location: I flitter here and there Posts: 547 highcountryexplorer - '86 Nissan 720 KC 4x4 ST with fiberglass cap 90 day: 21.78 mpg (US) Elroy - '03 Ford Focus ZX3 w/Zetec DOHC engine 90 day: 32.89 mpg (US) Thanks: 6 Thanked 78 Times in 65 Posts	I've done the CHT sensor and TPS (throttle position sensor) on an '86 Nissan 720 4x4. I have 2 rheostats in the dash and a switch also on the CHT sensor. I notice that in warmer weather I can leave the CHT switch "on" and get a good start...in colder weather...it's more difficult to start. The TPS mod will allow leaning the engine out to the point of reduced power. I also run an EFIE at 200 mvs....seems to allow the O2 to cycle more easily than with no added mvs. I don't believe I've documented an mpg gain though. I was having several other tuning/electrical issues with this truck and eventually I put things back to stock...thinking my messing around was the problem...when I noticed an increase in power. Since I have the rheostats in the dash I can adjust things at will....now running at about 1/2 the LEAN setting I once ran. What I am messing around with on my wagon is a a fuel vaporizer that has indications of both improving power and mpg....but I really haven't been able to finish testing it....having issues with the gas valve closing up and not allowing gas to vaporize. Since I can lean the truck down real well...I eventually want to test a fuel vaporizer on it. Here is some info on the subject: http://www.nonags.org/members/nijqk/Sensor_mods.doc __________________ *Carry on humans...we are extremely proud of you.* .................. Forty-six percent of Americans believe in the creationist view that God created humans in their present form at one time within the last 10,000 years. GALLUP POLL Last edited by suspectnumber961; 08-02-2010 at 09:15 PM..