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  #1  
Old 05-14-2015, 10:42 AM
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Default Poor Braking Performance

So I bought my truck used last month, and it currently has about 75k miles. I have only driven it 200 miles since I bought it but I noticed that it has terrible braking performance. To give you an idea of how bad, from 30mph, it takes over 100 ft. to stop. I suspect there is air in the abs unit, since I did a brake bleed yesterday and that didn't fix it. I did notice that the fluid was VERY dark...probably tobacco juice color if I had to give an example. I called the dealership asking how much a flush would cost, and the lady said, "Why would you want to flush your brake fluid? That's not typically done." I didn't even have a response to that absurd comment, but saying I'd like to do it regardless, she quoted me $120 out the door which seemed fair. Anyways, judging by the guy that owned it before me, it's probably never been changed, and I'm sure its either contaminated with water, or has air in there somewhere. My dad swears it's the rotors, but they look fine, other than the fact they are due for replacement here soon (they've got 10-15 mils before they hit minimum thickness). Pads were just replaced before I bought it with standard semi-metallic pads.

Is the fluid flush the likely fix? I've never had a vehicle this bad at stopping...it doesn't even think of locking the tires up even with the pedal to the floor, and it will be my daily driver here in a few weeks and I don't want to go crunching up someone's rear end.
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  #2  
Old 05-14-2015, 12:50 PM
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To correctly bleed an ABS system, you need a scan tool capable of running the ABS bleed function. Since you plan to flush the system anyway, have the dealer bleed them while they're at it.
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Old 05-14-2015, 01:09 PM
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One other thing to inspect would be the rubber brake lines. Over time they weaken and bulge under pressure, affecting braking performance.

I replace mine with braided stainless steel lines and now that I have the 2500 i am on the search for a set for that truck.
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Old 05-14-2015, 03:09 PM
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Quote:
Originally Posted by RamTech View Post
To correctly bleed an ABS system, you need a scan tool capable of running the ABS bleed function. Since you plan to flush the system anyway, have the dealer bleed them while they're at it.
Gotcha...I assumed that the bleed would be part of doing the flush. Never thought if it being separate.

I was looking at scan tools as I'm normally a DIY guy, but the cheapest ones I could find that did the ABS Bleed function are insanely pricey. I just found an AutoEnginuity one that is about 430 with necessary software, and most people say it works well for non-pros. I might look into that, especially if I need to do this every couple of years.
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Old 05-14-2015, 03:41 PM
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$430 is dirt cheap for one with any type of bi-directional controls. I think we paid in excess of $5k for our Solus and it's not top of the line by any means.
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Old 05-14-2015, 04:52 PM
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Right...sorry, my last post wasn't clear. I wasn't saying that 430 was insanely pricey...but the Snap Ons everyone raves about using was, as you said, much more...3.5k up to 10k.
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Old 05-15-2015, 12:01 AM
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Oh, I got your meaning. I'm just surprised anyone makes one that cheap with that much capability.
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Old 05-18-2015, 09:59 PM
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Im just throwing this out their but yes to correctly flush it you need a scan tool to do it right. Hears my question will one of the Diablo tuners be able to do this. Considering they can be used as a scan tool. Or any other tuner. Kill 2 birds with one stone lol
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