Yes, I have a lot of people fooled. I've never actually owned a pickup truck so all my information comes from my friend with a body / repair shop and a former coworker. I think there's less complication with the chips for gas engines because all they can mess with are a few sensor voltages. My understanding is they used to trick the Engine Computer into thinking more fuel was needed, as in colder weather, and that provided more power. If you read the ads for the newer models, you should find they have different settings or selections for improved fuel economy too. Be aware that raw fuel helps to cool the valve heads and running lean too long can result in burned valves. Diesels are different because they're wide open to air all the time. Varying the mixture, (reducing the fuel, actually), is how engine speed is controlled so they are expected to be very lean at times. With gas engines you need to maintain the proper mixture all the time. While running lean can increase fuel mileage, it results in incomplete combustion so emissions will go up. My eyes glaze over when we start talking about four and five-gas analyzers related to emissions testing. If you live in an area that requires periodic emissions tests, the mechanics around there will be a better resource to find out what works and what doesn't
Don't overlook the "reviews" section found on many web sites that sell various products. You can learn what other people think of the chip you're considering.
Wednesday, October 9th, 2013 AT 3:28 AM