Question about 1997 Ford F250 SuperCab

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F 250 brakes

I have a Ford F250 with a 7.3L diesel. When I start the engine the front brakes lock up. When I shut the engine off and remove the vacume line and check valve the wheel will then turn free. I just purchased the truck and there are 2 new calipers on the front. Whats up with this? How do I fix it?

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Does the red break light come on the dash like when the park break is applied?
If so the check your proportioning valve if the truck has an abs system then the valve will be called a rabs valve.( located on the frame rail under the driver side seat) Check the break lines on the front calipers to see if they are damaged they may have been pinched so bad that they will not release. Also check to see If the master cylinder was changed , if the break lines were connected to the master cylinder incorrectly or the wrong master cylinder was installed the breaks will apply themselves…please rate this if it helped thx…

Posted on Oct 26, 2008

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Diesel. Reduce power lite turned on. Shut off engine and started back up - lite is off. Can it be driven?


Jerry, Drive to a good shop. So many things can cause reduced power light unfortunately. The first step would be to get the truck hooked up to a scanner/computer and have the computer scanned for trouble codes. One thing that you could try is to drain the water from the water separator that is mounted on the frame under drivers front door. If the PCM picks up on water, power is reduced until water is removed/drained. It could be an exhaust sensor that is reading faulty. Unfortunately from here its impossible to tell you exactly what the fault is because there are just so many engine sensor inputs that could cause your problem. Check the attached links, forums,instruction and guides, Good luck
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I have a 1999 f 250 the front brakes will lock up randomly I replaced the front pads and it still does it. Can a vacum line from the booster assist cause this


No, you probably have a defect somewhere in your ABS unit to do this-try disconnecting the harness from the ABS to see if the problem goes away.

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I am looking for a vacumn pump for that runs with booster brake it is what generates pressure to the brakes


the vacume is produced by the engine not a pump if there is no vacume getting to the booster either the hos is disconnected (broken) or something is wrong with the engine..first disconnect the hose going to the booster start the engine and verify if there is suction by blocking the hose with your finger shut off the engine if there was vacume and your pedal is hard your brake booster is probably bad

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Ford f 250 6.0 diesel power stroke when you start the engine the steering wheel becomes wery strong if you use the foot brake why ?thanks a lot .OVY


the power steering pump also is connected to the brake booster and both take vaccum this is a verry common problem and sucks, the only way to fix this is to get a new power steering pump, just to have it happen again in a few years.

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89 f250 7.3 diesel, brakes went very stiff, still stops but must press extremely hard , replaced grommet in power booster, but still same


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1 Answer

What is the procedure for engaging a 92 ford f-250' 4x4 ?


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1 Answer

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16 to 20 at idle and 20 to 22 at the most diesels also use a auxillary pump to get the vaccum because it has no trottle there for no vaccum, might want to check that also.

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2 Answers

Brakes


sense its a deisel i would go with the vacume pump, diesels don't put out any or very little vacume, if you don't have vacume than booster won't work hense hard peddel. when you say you let up on peddel and hit it again you got better break tells me it is not getting enought vacume to booster. i would go for the vacume pump.

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I would think the power brake booster has failed, do u hear any hissing when u press the brake pedal?

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