Guest Anonymous Posted February 28, 2001 Share Posted February 28, 2001 well, i just got a potentiometer from Radio Shack that i am going to be installing. it goes in between the coolant temp sensor and the ECM. then, from in the car i can make the ECM think that the car is cooler, or warmer than normal. so i can adjust the ECM to give me slightly better gas mileage or more power on demand!! hopefully, i'll be installing it this weekend when i change out my differential. has anyone ever tryed this before? Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted February 28, 2001 Share Posted February 28, 2001 Not me, sounds interesting tho; have to get ideas from some others a little more on top of the ECU/ECM stuff. Kevin Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted March 1, 2001 Share Posted March 1, 2001 That won't be just the fuel curve you're fiddling with - you'll be changing timing as well. Honestly, and not to burst your bubble, but I'll be surprised if it nets you much. OEM folks tuned that puppy to the best of their knowledge at the time, if they could've gotten more MPG they probably would have. Try it and report back though as you'll never know till you try. Is the car mostly stock or modified? If it's modified, especially on a MAP based system, then you'll have the best chance of improving on the factory's programming. Good Luck! P.S. What's the stock voltage range on that sensor? Keep that in mind as if it's very small you'll want a potentiometer that has a very small adjustment range and vice versa... Quote Link to comment Share on other sites More sharing options...
Guest scca Posted March 1, 2001 Share Posted March 1, 2001 i tried a similar think on a potentiometer and it didnt seem to help my stumble. got fedup with the oem stuff and jsut bought the sds.. Mike Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted March 1, 2001 Share Posted March 1, 2001 i do have a couple of mods right now. mainly just factory exhaust manifold with 2 1/4" complete exhaust to the back. i also have an Accel Super Coil. in my garage i've got a Turbo MAF along with a normal MAF, 6-2-1 header, slightly modified intake manifold, and a slightly warmed over cylinder head. since my car is a 79 and i am using the factory 2.8L i don't have an O2 sensor. so once i get these mods on there, i'll be running a little on the lean side. great for gas mileage but bad for performance. the potentiometer i got is a 10 turn unit so its easy to be precise. i'm not sure of the exact specs on it, but a few people have used it before for this application. so i figure for $20, why not!! Quote Link to comment Share on other sites More sharing options...
clint78z Posted March 1, 2001 Share Posted March 1, 2001 Yes that will work, and with factory emmisions is #1, economy next, power third . On the 280z(x) non turbo the igntion advance is not set by ECU . An air fuel ratio meter with O2 sensor bung might be a good thing to try and set the right ratios . Quote Link to comment Share on other sites More sharing options...
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