I think you have this backwards. In the turbo crowd (where I come from) they lean out the air/fuel mixture to create a hotter/faster burn and more power. Obviously this increases the risk of knock or ping which is the combustion of the air/fuel mixture before the spark plug fires or before the piston is at or near TDC. Most cars sent to the US are detuned (set to run rich) since we have a wide range of 87 to 93 octane gas and the car companies don't want to be replacing engines for people who don't listen to their gas recomendations. 87 burns hotter and 93 burn cooler. That's why high compression and turbo (non-diesel) engines require higher octane gas to run safely.If this is like previous ones, it is a probably a $0.50 resistor you could get from radio shack. You replace your temp sensor with it, so the LCs computer will think engine is always cold. It will then always run rich, theoretically giving you a miniscule amount of extra power. It might get you 1 hp and no way will it give you more mpg, if it is always running rich. You know what they say, if it's too good to be true...
Even if there were noticeable power and mpg gains (there are not), I would not do that to my LC, who knows what it will do to long term reliebility.
So, I've decided to buy one and instal it this weekend to use for the African trip I am leaving for next week, instead of the extended range fuel tank I had scheduled for install this weekend. Why would I need the extended range tank and all that extra weight and expense when I can just install a $25 chip that will completely change the dynamics of how the combustion of my 14 year old engine operates?
This should make for an interesting install/results thread if someone is going to volunteer as a guinea pig...maybe then we could have some trusted results from a truly reputable source!
Please keep us updated (with pics of the install, true mpg results, etc.)
And all this time I thought Viagra in the radiator would help.I'm going to buy one, not because it will help my truck but because it will make me more handsome. Ok, it will make me less ugly. Women will swoon when I walk by and not just because I've been working on my truck in the hot summer sun. I think it will also make me taller.