I am also thinking booster, mine is doing the exact same thing...
Gary Hedlin wrote:
>
> No... it's just one of those things. Like that one math problem where the
> answer doesn't make sense, but it works every time you check it. :)
>
> Gary
>
>
> On Tue, Dec 13, 2011 at 11:26 AM,<clhyer@cox.net> wrote:
>
>>
>> Gary& Michael,
>> Thanks for the replies guys. Unless I hear another possibility to check
>> out I plan to replace the vac. booster this weekend.
>> Gary, you sure aren't discrediting me; maybe the FSM? LOL.
>> Cal
>>
>>
>>> Date: Mon, 12 Dec 2011 11:04:28 -0500
>>> From:<clhyer@cox.net>
>>> Subject: DML: Brake questions
>>>
>>> Good morning folks,
>>> Working on my son's '98 V-6 2WD Dak and am kinda stumped. Briefly,
>> about a year ago the brake and ABS lights came on. At the same time the
>> pedal took more effort, took more pedal before starting to work and when
>> stopped you can feel the pedal pulsing like a spring snapping back on the
>> pedal.
>>> We replaced the speed sensor at the rear end without success. I
>> replaced the master cylinder without any change.
>>> I've taken it to a shop to have the code read and it said it couldn't
>> read the ABS controller (located on the LF fender). I picked up a used
>> controller at a junk yard and so far (about 2 weeks) the lights have stayed
>> off. The pedal remains unchanged.
>>> I have performed the various tests outlined in the FSM and cannot locate
>> the problem.
>>>
>>> The last test I performed was with a vacuum gauge to check the booster.
>> According to the directions and diagram the vac. gauge is hooked into the
>> vac. line with a "T" fitting. The vac. line into the T is clamped off, the
>> engine shut off and you see how long vac. is held. A loss of 1" in 15
>> seconds is supposed to indicate a bad booster. When I perform this test,
>> as soon as I clamp the vac. line the vac. goes to zero. It don't move when
>> the truck is shut off either! Duh!!!
>>> Anyhow, I performed this same test on my '99 Dak which has no brake
>> issues. The vac. gauge does the exact same thing.
>>>
>>> The truck stops fine, it just takes more pedal and more effort. Any
>> ideas for me?
>>> Thanks,
>>> Cal
>>>
>>> ------------------------------
>>>> ------------------------------
>>>
>>> Date: Mon, 12 Dec 2011 15:20:16 -0500
>>> From: Michael Maskalans<dml@tepidcola.com>
>>> Subject: Re: DML: Brake questions
>>>
>>> On 12-Dec, 2011, at 11:04 ,<clhyer@cox.net> wrote:
>>>
>>>>
>>>> The truck stops fine, it just takes more pedal and more effort. Any
>> ideas for me?
>>>
>>> That sure sounds like a booster issue to me, but your similar test
>> results do make me question it. Until that point I was thinking "booster,
>> booster, booster" though so I'm going to stick with my gut and say you've
>> got a bad booster.
>>>
>>> Michael
>>>
>>> ------------------------------
>>>
>>> Date: Mon, 12 Dec 2011 16:06:57 -0600
>>> From: Gary Hedlin<superdak@gmail.com>
>>> Subject: Re: DML: Brake questions
>>>
>>> It's screaming booster to me too... I know the test results say
>> otherwise,
>>> but I've been down that road with the 98, so I have to say its the
>> booster
>>> issue. Not to discredit you or your tests, but I just cant see anything
>>> else.
>>>
>>> Gary
>>>
>>>
>>
>>
>
>
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