slyhog022056
Full Access Member
Hey folks, been a while since i have been here but i have a problem that has been ongoing for a while. 1991 Ford F350 crew cab dually. 7.3 IDI, automatic 165,000 miles
I have replaced everything NEW, not rebuilt, vacuum pump, front rotors, calipers, master cylinder and brake booster (as a set) and all rubber hoses. The entire brake system has been flushed out and bled several times. The fronts will lock up if i mash the pedal really hard in a panic situation.
The rear has had new shoes put in about every 3 to 4,000 miles since they appear to be the only ones working.
I have always had a soft pedal, even swapped out NEW master cylinder 3 times, yes the rod gap is correct. rear ABS has been bypassed. rears work great except having to adjust them up 3 or 4 clicks every 2 or 3,000 miles. (normal for a Ford.)
Why cant i get the front brakes to work? proportioning valve?? I have ran out of ideas. In march i will have to pull a 20 ft trailer through the colorado mountains, the truck is 10,500 lbs empty and the trailer is 3,000 lbs empty, I definetly need good brakes before then.
My knock to me sound like a lifter, it comes and goes and hardly ever knocks past 1200 rpm, only at idle.
Is this common in these engines? it isnt injectors, they are brand new from Conestoga.They all react the same when cracked open at idle and at 1200 rpm. There isnt any air in the system, it sat for 4 months and started right up without using glow plugs. I have tried to listen with a stethescope to trace it down, it just sounds loud like a rod.
I have replaced everything NEW, not rebuilt, vacuum pump, front rotors, calipers, master cylinder and brake booster (as a set) and all rubber hoses. The entire brake system has been flushed out and bled several times. The fronts will lock up if i mash the pedal really hard in a panic situation.
The rear has had new shoes put in about every 3 to 4,000 miles since they appear to be the only ones working.
I have always had a soft pedal, even swapped out NEW master cylinder 3 times, yes the rod gap is correct. rear ABS has been bypassed. rears work great except having to adjust them up 3 or 4 clicks every 2 or 3,000 miles. (normal for a Ford.)
Why cant i get the front brakes to work? proportioning valve?? I have ran out of ideas. In march i will have to pull a 20 ft trailer through the colorado mountains, the truck is 10,500 lbs empty and the trailer is 3,000 lbs empty, I definetly need good brakes before then.
My knock to me sound like a lifter, it comes and goes and hardly ever knocks past 1200 rpm, only at idle.
Is this common in these engines? it isnt injectors, they are brand new from Conestoga.They all react the same when cracked open at idle and at 1200 rpm. There isnt any air in the system, it sat for 4 months and started right up without using glow plugs. I have tried to listen with a stethescope to trace it down, it just sounds loud like a rod.
