u7165 9r12 get 10-12 mpg ??

[juzatheman]

i have -03 excursion 6.0l and the milege is something un real 10-12 mpg under 50mph driving at normal finnish roads an maby i can get 13-14mpg on highway if i push it to going =) at speed 55-60mph....

i have the 100hp tune on.

what could be wrong..

[mikel]

fuel filter?

injectors?

[juzatheman]

fuel filter?

injectors?

about six months a go changed:
-all 8 injectors
-hi pressure pump
-icp sensor
-oil and filters (3 times)

this week:
-all filtters and oils what you can possible change.

no influense what so ever...

at cold outdoor temps (41f-32f) no power at all un till engine warms up to normal temp. if i push the pedal on the floor i couldnt catch up 1.0l nissan micra...

it is same acceleration speed if i push 1/2 inch the pedal or if i push it to the floor...

and the engine shakes and wobbles between 1150-2100 rpm

no trouble codes

something have to figure out before winter comes an it hits below -30f

p.s. no white or black smoke.

[BIGROC]

How many miles are on it?Check your FICM output voltage to see if it is low.It should read 48.5v but no less than 38-40v when running.They had problems with the solder joints coming loose inside the module and low power will affect fuel mileage.It will also cause poor starting in cold weather.

[juzatheman]

i have a 7 pin fimc and the up left pin gives a reading 46v and the up right pin 11v.
how about the injector side there is a 4 wires/injector and only one wire 46v anothers 20v and less... is it normal? per injector

[BIGROC]

Each inj. should be getting 46v,if not this might be your problem

[juzatheman]

yes each injector gets 46v at one of the four wires,
but doesnt there should come 46v at two wires each injector for open and close side coils,if the 20amp pulse is same to opening and closing the injector?

i haven't yet check it with oscilloscope because i have hard time to get one to loan...

[iwantmorepower]

It' s not the FICM or injectors, it is the shitty tune . I had it on mine too and it did the same thing , removed it went back to old 9r0r7 crom and now truck runs great no more trouble.

[juzatheman]

how i can un done my 9r13 tune? i change my fimc to swamps 58v fimc and things got better a lot but i dont think the power of the truck is there where it shoud be...