I have worked on the brakes on my 96 F350 , put New Master cylinder New wheel cylinders an everything an bleed the system really good but my brake petal still goes to the floor , also i would like to know if anyone knows how to improve fuel mileage ,

 

any lines leaking? Is there resistence on the pedal sa it goes to the floor? Did you bench bleed the master cylinder before putting it in? leaking fluid anywhere? Sorry if I insulted you, not my aim, I just need to get a little more info.

As for mileage, if you've got the diesel (assuming) then you may want to check out biodiesel. It's an investment, but you can make diesel for somewhere on the order of 70cents/gallon. As for gas, drive nicely, tune it up, and as it's cold I think a colder thermostat will make it have to warm up less. The engine runs rich to heat up quicker. Not sure about the thermostat thing, wait for somebody to flame me or not.

 

yes i bench bleed the cylinder an i cant find any leakin fluid the pedal has some resitance u can pump the pedal up but it slowdly goes to the floor , with pressure on it it just has me puzzled an also about my fuel mileage im geared 410 so i think that has alot to do with that but i get around 15

 

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hows the connection to the vacuum booster from the engine? If that's not good then it will take a bit of travel to make up pressure.

 

I am trying to remember if the brake boosters for diesels in those days were hydroboost or vacuum. I am thinking they are hydroboosted. Check and make sure your power steering fluid level is good. I would think you would wind up with a leak on either side of the firewall if that puppy let go on you.

I trust you adjusted the rear brakes, because you could get the same lousy pedal from having the rear brakes out of adjustment. If you've done brake work before, though, you probably knew to do that. Just in case...

As for the MPGs, don't dig the spurs in too hard and check your tire pressure regularly. You might try a fuel additive, but that has a cost as well.

 

Well i adjusted the rear brakes again i will look into the sugestion that u gave because i would like to get this fixed thanks again

 

If you can pump it up and hold the pedal down right away and it goes down you either have a leak or the master is bad. No other options that I know of.

Dick