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View Full Version : Power Mods how to lean out car with vortech super fmu



USMC_is300
02-08-2006, 08:05 AM
i am trying to lean out my eclipse its running way to rich and flodding out the cylinders before the car starts i have the vortech superFMU and i need to know how to asjust it to lean it out

anothaRRR
02-08-2006, 08:15 AM
Change out the disc on the fmu to a smaller one...(guessing you running 12:1)

USMC_is300
02-08-2006, 08:19 AM
not sure when i bought the car id was setup this way battle ground tuned it out so im not sure also i didnt get the disc or anything so i guess i will have to finish it up

Evil Goat
02-08-2006, 01:43 PM
ummmm wtf....the fmu is not your problem if its flooding before starting, an fmu is mechanical (meaning it has no electrical impulses that tells it when to turn on, so its not even regulating fuel pressure before starting the car) and only raises the fuel pressure when it sees boost, meaning it doesnt kick in until boost kicks in, fuel pressure will stay stock at idle or out of boost, so if you have a 12:1 disk it will raise the fuel pressure 12psi for every 1psi of boost it sees, but will not raise pressure before seeing boost, if it did you car would run like balls out of boost running extremely rich

edit: what kind of eclipse do you have? (is it a gs, rs, gs-t, gs-x?) im trying to figure out why you have an fmu to begin with, is it a n/a eclipse thats been turboed or something? theres no need for a fmu if its a 4g63t the ecu takes care of that problem until a certain point and then you can either go dsmlink, safc, or a nice stand alone, and you say its using a fmu but was tuned by batlground, what kind of tuning did they do, to my knowledge you cant use a fmu and say a safc, dsm link, etc together...b/c an fmu does mechanically what a safc, etc does electronically but with virtually no tunability

anothaRRR
02-08-2006, 07:13 PM
shit, I didnt even read the whole thing, I thought it was running rich driving the car, nevermind, the fmu isnt the problem....

Evil Goat
02-08-2006, 07:24 PM
^i was kinda thinking that, arent you the fellow w/ (or had, was for sale last i saw it) the turbo type r?

anothaRRR
02-08-2006, 07:33 PM
^i was kinda thinking that, arent you the fellow w/ (or had, was for sale last i saw it) the turbo type r?
yeah, still have it...

Evil Goat
02-08-2006, 09:24 PM
cool man, love that car, so clean, i make a habbit to come over and check it out at every import showdown