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have gforce chip for lincoln towncar has 6 map sensor wires which 2 do i use its 2003 with 4.6
Please don't install that. If you can, send it back to the company for a refund. I am a dealership tech and have seen multiple vehicles come in with these types of devices hooked in and either cause check engine lights, or damage sensors. People also don't seem to understand why they have to pay $300 (ish) for a new MAF/IAT sensor on their brand new car that their brand new 'super' chip cooked. And replacing your intake air temp sensor with this little chip (which is essentially what you're doing) is not going to give you 60 hp and 6mpg extra. It's just not going to happen.
I would highly recommend you do a bit of research before proceeding to install, for fear of damaging your car, or at best case scenario, just wasting 70 bucks on junk that doesn't work.
Here's a couple links I found with some decent info with a quick google search... the first one is very interesting, shows someone taking one apart, and gives a quick basic breakdown from an engineering standpoint how this wouldn't work. The second one gives a handful of more links with a bit more detailed info.
http://priuschat.com/forums/gen-iii-2010-prius-accessories-modifications/84008-g-force-chip-scam-real.html
http://www.gaownersclub.com/forum/showthread.php?threadid=75121
Car Electronics Technician
10 years experience, installation manager