brevard2012

watching thread closely,   wife's 2012 edge with 90k miles,  like poster had pedal to floor, slowly,  but stopped.  i put on master cylinder and didn't help. 

no ABS light.  I got on wet grass and did several panic stops and ABS was working.

I took it to local garage full well expecting new ABS unit needed.

I had never heard of computer bleeding. He said it took 2 times bleeding but seems fixed,  only been 2 days since picked it up.  He said sometimes after a month or so has bleed them again and seemed to stay fixed.

it has 63,000 miles on it, i have run several cans of sea foam and techron along will filling up at chevron station, i think it was the concentrate as it said good for 3000 ? miles as other bottles said less.

I suppose i could have an injector with some sort of issue that it works better for only a short while after sea foam goes thru it,

i run mobil 1 5-30 and change at 7000 miles,

I should pull spark plugs. to see if tips indicate one cylinder different than others.

about time to try and remove intake manifold as well, can look for carbon build up.

i think a vacumm leaks let extra air in and causes negative LTFT as it getting too little fuel, plus a leak that would cause issues at 65mph and not a idle seems unlikely.

The short story is a while back my MPG dropped signiicantly, >20%, at say 65mph. I found the LTFT was almost +20 as I cruised along. I think I found a CEL won't get set till it hits 25. magically adding sea foam to gas tank really helped LTFT and mpg. LTFT dropped to +5. But the LTFT would creep back up after several tanks. I found I could pull the fuel line at the pump, under the hood, empty line and give put a capful of sea foam in line and it has same positive effect on LTFT. I suspect the Fuel pressure sensor is what is being affected by sea foam. I think its supposed to be 2% accurate. I really should just replace it but little nervous pulling intake manifold, although I would love to see how much oil on back of valves. but so easy to just add sea foam.

I Changed Air Filter, O2 sensor.

​So my question is, for anyone that is getting good highway mpg, what is your LTFT when cruising, also at idle, mine runs +10 to +15 at idle, what yours.

My STFT seems to mover around, plus and minus.

A positive fuel trim number means the engine is getting more gas than optimum, so a weak fuel pump can't be cause, it would have to be putting out too much pressure, I suspect the fuel pressure senor is out of tolerance.

How hard is intake manifold to remove ? I have not see any youtube videos specific to this 2.0 engine.

by the way, I took it to dealer before warranty was over, with +20 LTFT and they just blew me off , said nothing was wrong with car.

thanks

just installed the newer part, f2gz-19g490-a, in my 2012 edge, works great, the green yellow red lines had been missing long time, their back.. plug and go, no calibration.

I went to dealer with the $85 without shipping, price from web and they let me have it for 100, about the same as the web one with shipping.