Good evening,
If you recall my 88 f-250 that you all helped me get running, 1988 f-250 4x4 with 4.9 and 5 spd, I took it to a shop the other day for alignment and tires and told them the brakes were locking up just check them out and tell me what's going on, they said they fixed the brakes and test drove truck for 25-30 miles and no problems. I put the truck on a trailer and pulled it home, unloaded it drove 10 miles and the brakes locked up again, so I called the shop and told them they said we don't know why you already had new calipers hoses and pads so we just flushed the system. I reminded them that the truck sat for a few years. We'll send you some new calipers and that will fix it. Put the new calipers on and pads blew through all steel lines, truck was fine put a couple hundred miles on it front brakes locking up again.
Any ideas I m thinking I'm going to have to replace all the steel lines and proportioning valves and tees.

Second problem after getting truck running it seems rich and when idling it sounds like it is either starving or flooding?

 

So front brakes are locking up not the rear? When this happens are you trying to stop quickly and stomping on the peddle or are you just lightly touching the brakes?

Don't guess about the engine issues, check fuel pressure and pull the codes and post up the results of your tests.

 

did you replace the master cylinder? if the pushrod is not properly adjusted, the front brakes will slowly lock up. and stay that way until the truck sits for a few hours.

the easy way to test this is when the fronts lock up, loosen hte brake line at the master cylinder. if pressure releases once loosened, the master pushrod is too long.

 

Front brakes will lock up when you are just driving you will start to feel it going from 3-4 gear when you go into 4 the rpm s will just start dropping like you are losing power then if you take your foot off of the gas it will almost stop dead in its tracks

 

I have not replaced the master cylinder myself although it look like it may have been replaced in the past. Previous owner told me that he was driving the truck and the front right I believe locked up so he took it to a local guy and had him fix it, then when the other side locked up he told him to just replace everything in the front pads, rotors, calipers, and hoses.

When I got it running I drove it and the brakes were locking up, so I took it to a local shop for tires, alignment, and to check and fix the brakes.
When I picked it up they said they bled the system and all was good and looked to be brand new, I drove it about ten miles before I loaded it on the trailer, unloaded it at my dad's house got on the main road and when I got to 4th it felt like it was losin power, limped to the station thinking it may be out of gas due to gauge not working and sure enough front hubs were scolding hot, brakes locked up.

I drug it to my buddies place and called the shop told them to get me a set of pads and calipers and I would just replace them myself, did that put another 60 or so miles on it and now locking up again.

 

get it to where the brakes are draging. loosen the hard line at the master. if it releases pressure and frees the brakes, it is either a collapsed soft line or a misaligned master pushrod. i doubt it is a soft line, because very rarely do they collapse, and almost never both at the same time